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The prediction of water requirement is important in planning and managing irrigation system. Based on this case, this study aims to evaluate water requirement of irrigation to obtain the prediction of maximum value of water requirement. The research took place in Irrigation Area of Ampiang Parak at Pesisir Selatan Regency with the area was 2,363 hectares. The descriptive qualitative analysis approach was used to collect the data by using observation, interview and taking of primer and secondary data. The tabulation of data used Cropwat version 8.0 software to analyze water requirement values. The result of this research the calculation of water requirement values using Cropwat version 8.0 software are 4.772 m3/sec in MT 1, 4.770 m3/sec in MT 2, and 5.05 m3/sec in MT 3. The data shows that irrigation area may not have dryness. However, there is some area that is rainfed. Based on observation at Irrigation Area of Amping Parak there are leaking lines, and there are area irrigations that have not connected according to irrigation area of Amping Parak scheme.

The earthquake on February 25, 2022, in West Pasaman resulted in damage to people’s houses as well as fatalities. The quake happened just under the Mount of Talamau, 18 km northeast of the city of Simpang Empat City, with a magnitude of 5.2 M. This earthquake was followed by small earthquakes that occurred until February 27, 2022. Damage to houses in the earthquake-affected area became the focus of attention in this research to assess the housing vulnerability related to the earthquake hazard. The vulnerability assessment of house buildings is critical in earthquake-prone areas because it can provide information about the impacts on the buildings. The vulnerability of house buildings is closely related to the potential for damage due to earthquake hazards. The benefit of the vulnerability assessment of house buildings is to arrange the mitigation action plan to reduce the level of damage to building structures. The method, in turn, can reduce the number of fatalities as well. Buildings with a high level of vulnerability to earthquakes are non-engineered or residential buildings that are built without considering essential factors in planning, such as the necessary technical requirements.

Landcover changes (LCC) are one indicator of an increase in population in a watershed area that demands the provision of housing locations, road infrastructure, and productive land to meet the needs of life. LCC can positively impact the form of increased land use values and incomes, while also negative impacts in the form of erosion, landslides, and floods. The watershed area should have a balance in its development. This research is important as a first step in overcoming changes in land cover that can threaten the sustainability and sustainability of the Kuranji watershed. The aim of the study is to reveal the LCC from 1985 to 2018 and its causal factors in the Kuranji watershed. The methodology used is descriptive qualitative with 60 respondents. Data were obtained by interviewing respondents. Respondents are those having agricultural land and working in the agricultural sector and this research was carried out in 2019. The results showed an increase in the type of land cover of settlements and mixed gardens, while forests, rice fields and shrubs have decreased. The main factor influencing changes in land cover is economical (59%), followed by social factors (25%) and political factors (16%). It was also found that local wisdom of the Minangkabau culture was able to reduce LCC. In Minangkabau, the land owned by the community, in general, is a legacy from generation to generation that cannot be sold without significant reasons.

Floods often occur in Lubuk Buaya residential housing in Padang city, which has a population of 6,500 citizens per km2. These natural phenomena happen due to sea level water rises and the change in the new river mouth of the Batang Kandis river. The construction of a 500 m floodway and a 700 m dike of Batang Kandis river were proposed to control flooding. The floodway was then damaged during the earthquake on September 30th, 2009, and wiped out by a flood on March 24th, 2016. Theoretically, to solve flood conditions downstream of Batang Kandis river with 70 km² of watershed area, the floodway is expected to be able to discharge 307 m3/s. This study uses a numerical simulation using HEC-RAS software with three scenarios. The first scenario uses the existing condition of the river width of 50 m and a depth of 1 m, it experienced an inundated area of 0.60 km2 for 5 hours. The second scenario is done by increasing 2.50 m embankment height, which gave the result of 2x700 m2 flood inundation in several locations. The third scenario also carried out dredging of the river up to the elevation of 0.00 m above sea level, and there was no flood inundation. Thus, the third scenario is the best result that has been carried out to control the floods downstream of Batang Kandis river

Floods have often occurred in the city of Padang, PALAPA Metropolitan Urban Area in recent years, this is generally caused by high rainfall and poor drainage capabilities. NVivo software is utilized to analyze the online news which reported floods occurrence. Based on the news collected from 2009–2018, it was found that Gunung Pangilun Village, Padang Utara Subdistrict was often flooded when it rained for more than 3 hours. This area is a densely populated area (1,000 people / km2). The cause of inundation in this area is that drainage is not able to accommodate water and high rainfall intensity with the parent river in the Batang Kuranji watershed. The flooding that occurred in this area caused several schools, offices and hospitals to be flooded, a number of houses and a number of points on the local road were flooded. Therefore, it is necessary to know the large drainage capacity that is able to accommodate the amount of runoff discharge when the rain occurs using the 5-year return EPA SWMM software modeling

Pembangunan Infrastruktur merupakan sebuah upaya yang dilakukan pemerintah kabupaten solok dalam meningkatkan kemajuan ekonomi kerakyatan yang tertuang dalam 4 pilar pembangunan dalam rencana strategis Barenlitbang Kabupaten Solok Tahun 2016 – 2021. Dalam kegiatan pembangunan sebuah infrastruktur pihak-pihak yang terlibat adalah Penyedia jasa konsultan perencana yang juga mempunyai peran dalam mendampingi pihak pengguna jasa (owner) dalam hal konsultasi, maka dari itu konsultan harus mempunyai pemahaman, pengalaman dan dapat menampung semua masukan atau keinginan dari pengguna jasa kemudian dituangkan dalam sebuah desain perencanaan. Dalam undang-undang nomor 2 Tahun 2017 tentang jasa konstruksi yang mengatur haluan kemajuan jasa konstruksi untuk dapat mewujudkan sistem badan usaha yang kokoh, kredibel, dan hasil yang berkualitas. Penelitian ini dilakukan untuk mengetahui tingkat kepuasan pengguna jasa terhadap kinerja konsultan perencana dengan menilai 26 variabel kepuasan pengguna jasa terhadap produk konsultan perencana menggunakan metode Field research (Penelitian Lapangan) dengan meninjau langsung ke lapangan pada bagian yang akan diteliti guna untuk memperoleh data primer. Kemudian dianalisis menggunakan 3 (tiga) analisa dengan Analisis Kesenjangan (GAP), metode Importance Performance Analysis (IPA) dan Analisis Customer Satisfaction Index (CSI). Dari hasil analisis yang dilakukan menunjukkan bahwa dari 26 (dua enam variabel) yang diujikan kepada 38 (tiga puluh delapan) responden diperoleh dirata-rata persentase kepuasan yang dirasakan oleh pengguna jasa sebesar 77,73% yang artinya pengguna jasa “Puas” terhadap produk yang dihasilkan oleh konsultan perencana

Sungai Anak Jaya Setia 1 yang terletak di Kabupaten Bungo sering mengalami banjir. Saluran drainase yang ada masih berupa saluran drainase alami. Tujuan utama dalam penelitian ini adalah menganalisa perhitungan saluran drainase di daerah Sungai Anak Jaya Setia 1 dengan debit banjir rencana 5 tahun untuk saluran sekunder, merencanakan Storage sebagai pembuangan akhir dari saluran drainase, Membandingkan menggunakan Storage sebagai membuangan akhir dan tanpa Stoarge. Data-data yang digunakan pada penelitian ini adalah peta tata guna lahan untuk penentuan persentase impervious area, data hujan. Seri data hujan yang digunakan merupakan data hujan jam-jaman. Maka dari itu perlunya melakukan modifikasi pada data curah hujan, penentuan distribusi hujan jam-jaman dilakukan dengan mengubah lengkung Intensitas-Durasi-Frekuensi (IDF) untuk periode ulang 5 tahun menjadi hyetograph hujan rencana dengan menggunakan Alternating Block Method (ABM). Setelah semua parameter input EPA SWMM 5.1 ditentukan dan diinputkan sehingga simulasi dapat dilakukan. Kualitas simulasi cukup baik apabila continuity error untuk limpasan permukaan dan penelusuran aliran < 10%. Simulasi yang dilakukan pada penelitian ini dibagi menjadi 2 skenario. Dari 2 skenario yang dilakukan jumlah titik banjir pada skenario 1 berjumlah 4 titik yang berada pada Junc 4, Junc 11, Junc 15 dan Junc 16. Sedangkan pada skenario 2 dengan di tambakannya Storage sebagai tempat penampungan air sementara sebelum di alirkan ke Outall terdapat 2 titik banjir yaitu pada Junc 12 dan Storage 2. Hal ini menunjukkan bahwa menambahkan storage sebagai tempat pembuangan cukup membantu mengurangi titik banjir.

Batang Kuranji Watershed with a total area of Watershed 224.7 km2 comprises Batang Sungai Sapiah Sub-watershed, Batang Danau Limau Manih Sub-watershed, Batang Sungkai Sub-watershed, Batang Bukik Tindawan Sub-watershed and Batang Padang Janiah Sub-watershed. Batang Kuranji flows from upstream of the Bukit Barisan with the highest elevation of 1,605 meters above sea level at the peak of Bukit Tinjau Laut and empties into the Padang beach with a main river length of ± 32.41 km. DEM has an influence on the results of land erosion by affecting the slope accuracy. The higher the DEM resolution, the more precise the results of the soil erosion simulation. With the MUSLE method the rate of erosion occurs in the Batang Kuranji watershed, with DEM data of 8m and land cover in 2017, an erosion rate of 23.91 tons / hectare / year is classified in hazard class II (light), DEM data of 30m erosion rate is 7. 70 tons / hectare / year are classified in hazard class I (very mild), with DEM data of 90m erosion rate of 4.54 tons / hectare / year classified in hazard I class (very light). It can be seen that the higher the DEM resolution, the more accurate the erosion rate calculation in the watershed.

The government of Indonesia had provided the Rehabilitation and Reconstruction (RR) assistance to 194,636 houses for communities after September 30, 2009, earthquake in West Sumatra. The community-based development model was adopted in this housing program aid. This study aims to explore people’s satisfaction towards the RR program and to identify the difference of satisfaction level between urban area and rural area. The research was carried out by conducting a questionnaire survey to 200 communities. The beneficiaries were invited to determine their satisfaction level based on 5 Likert scale from 1 as “not satisfied at all” to 5 as “absolutely satisfied.” The satisfaction level was assessed by two factors, process of reconstruction and result of reconstruction. It was found that the level of communities’ satisfaction is at average level. The satisfaction level of urban communities is 2.75, while the satisfaction level of rural communities is slightly higher at 2.88. The satisfaction levels of urban and rural communities with the reconstruction process are at 2.63 and 2.75, respectively, while the satisfaction level with the results of the program is at 2.84 and at 2.95, respectively. Communities’ satisfaction with the result of reconstruction is higher than that with the process of reconstruction.

Padang City is one of the metropolitan cities in West Sumatra Province and has six (6) watersheds, one of which is the Batang Kuranji watershed. Over the last few years Batang Kuranji watershed has experienced significant infrastructure and urban development which began with the massive earthquake of 30 September, 2009 with coastal communities, afraid of being affected by larger aftershocks having the potential of a tsunami, moving to the upper watershed. As a result, the type of land cover that was originally an infiltration area has been changing into a runoff area. The Batang Kuranji channel with a discharge (Q25) 870 m3/s may not be able to accommodate the change in discharge which can lead to flooding. This paper aims to determine changes in discharge that occur due to changes in land cover and to analyse whether the use infiltration wells and retention pond can reduce the flooding volume. Two methods to calculate runoff discharge were adopted, HEC-HMS 4.1 Modelling and Nakayasu. It was found that the peak discharged increases to (Q25) 1,037.60 m3/s. Thus, creating retention pond with a dimension of 35 hectare with a depth of 5 m and 34,246 infiltration wells can reduce the flood risk. The percentage of runoff discharge they can accommodate is 90.98% and 9.02% respectively.

Kabupaten Solok adalah daerah pertanian dan lumbung penghasil beras di Provinsi Sumatera Barat. Untuk menjaga produksi beras dan pertanian pemerintah kabupaten melaksanakan berbagai proyek sumberdaya air untuk menunjang produksi pertanian tersebut. Pelaksanaan proyek tersebut memperlihatkan adanya keterlambatan proyek. Penelitian ini bertujuan untuk mengidentifikasi sumber-sumber penyebab keterlambatan proyek infrastruktur sumberdaya air di Kabupaten Solok. Penelitian ini menggunakan metoda survey kuesioner dan total ada 75 responden ang teriri dari kontraktor, konsultan perencana, konsultan pengawas, PPTK, dan PPK. Hasil kuesioner memperliahtkan dari 17 buah faktor yang ditinjau didapatkan 5 faktor utama yang berpengaruh terhadap keterlambatan, yaitu pembebasan tanah (nilai rata-rata 4,53), pengaruh cuaca (rata-rata 4,53), tidak ada sosialisasi dengan instansi terkait (rata-rata 4,37), lokasi proyek sulit dijangkau (rata-rata 4,28), dan manajemen pengawasan proyek yang buruk (rata-rata 4,20).

Coastal regions are vulnerable to erosion and depletion of land areas for human habitation and economic activities. A description of various types of the hydraulic structures associated in erosion protection applications are provided. Recently, because of the shortage of natural rock, traditional forms of river and coastal structures have become very expensive to build and maintain. Therefore, the materials used in hydraulic and coastal structures are changing from the traditional rubble and concrete systems to the cheaper materials and systems. Erosion problems in coastal zones are become increasingly serious due to the development of artificial activities related to the expansion of city functions, industrial complexes and harbour facilities, as well as the removal of sea sand for use in aggregate resources at the construction sites, which is a major factor in the inflow and outflow of sea sand. In addition, the environmental and economical importance of the coastal beach zones is increased. However, coastal beach zones are constantly eroded by waves accompanied with the rising water level due to storm surges, hurricanes, winter storm impact, and high tide. This erosion motion accelerates the regression of the coastal cliff due to the regression of the dunes or the shoreline. In addition, the regression leads to loss of real estate in the hinterland and ruins the shock-absorbing zone between land and sea. The application benefits for erosion protection are discussed. Several case studies are included.

Infiltration wells, biopore holes, retention ponds serve to collect surface water from rain and then seep into the ground to become ground water reserves. This study aims to look at the application of a distributed hydrological model for the analysis of absorbed discharges in infiltration wells, biopore holes and retention ponds in the Batang Kuranji watershed. Research methods the study was conducted using a survey method that is secondary data collection and primary data. In this study the techniques of rainfall data analysis, Batang Kuranji watershed land use, Runoff analysis using distributed hydrological models and absorbed discharges in infiltration wells, biopore holes, retention ponds in the Batang Kuranji watershed. By applying model 4 using 1 infiltration wells, 2 biopore holes and 4 retention ponds can reduce the runoff rate in the sub-watershed by 7.514% - 27.545%, for the watershed level can reduce the discharge of 15.297%, the more the number of absorption wells, biopori holes and retention ponds more effective in reducing runoff in the Batang Kuranji watershed.

Batang Kuranji Watershed is one of the region river at Indragiri - Akuaman with a total area of Watershed 224.7 km2 consisting of Batang Sungai Sapiah Sub Watershed, Batang Danau Limau Manih Sub Watershed, Batang Sungkai Sub Watershed, Batang Bukik Tindawan Sub Watershed and Batang Padang Janiah Sub Watershed. Batang Kuranji flows from upstream of the Bukit Barisan with the highest elevation + 1,605 meters above sea level at the peak of Bukit Tinjau Laut and empties into the Padang beach with a main river length of ± 32.41. DEM has an influence on the results of land erosion by affecting the slope accuracy. The higher the DEM resolution, the more precise the results of the soil erosion simulation. With the Musle method the rate of erosion occurs in the Batang Kuranji watershed, with DEM data of 8m and land cover in 2017, an erosion rate of 23.91 tons / ha / year is classified in hazard class II (light), DEM data of 30m erosion rate is 7. 70 tons / ha / year are classified in hazard class I (very mild), with DEM data of 90m erosion rate of 4.54 tons / ha / year classified in hazard I class (very light). It can be seen that the higher the DEM resolution, the more accurate the erosion rate calculation in the watershed.

Banjir adalah suatu kondisi dimana tidak tertampungnya air dalam saluran pembuang (palung sungai) atau terhambatnya aliran air di dalam saluran pembuang, sehingga meluap menggenangi daerah (dataran banjir) sekitarnya. Langkah yang dilakukan pemerintah adalah dengan pengadaan konstruksi pengendali banjir dengan tujuan mengurangi bahkan menghilangkan ancaman banjir tersebut. Konstruksi pengendali banjir yang sudah ada di sungai tersebut adalah normalisasi dan checkdam. Penelitian ini membahas tentang kepuasan masyarakat terhadap pengadaan konstruksi pengendali banjir di Sungai Bungus tepatnya pada Kecamatan Bungus Teluk Kabung, Kota Padang. Jenis penelitian ini adalah penelitian deskriptif kuantitatif dengan metode survey. Hasil studi menyimpulkan bahwa manfaat dan kepuasan yang dirasakan masyarakat berbeda dari kedua konstruksi pengendali banjir yang ada di Sungai Bungus tersebut. Masyarakat merasa tidak puas dengan konstruksi normalisasi dan dirasakan belum bermanfaat. Namun, setelah adanya konstruksi checkdam masyarakat menjadi puas dan masyarakat secara keseluruhan sudah merasakan adanya manfaat dari konstruksi tersebut.

Salah satu wilayah di Kota Padang yang dilanda banjir adalah kawasan Jati Kota Padang. Berdasarkan data banjir 22 Maret 2016, indikasi permasalahan yang ada di kawasan Jati yaitu kurangnya kapasitas saluran drainase. Tujuan dari penelitian ini adalah untuk mensimulasikan kemampuan Jaringan Drainase Kawasan Jati dengan menggunakan program EPA SWMM versi 5.1 dan menentukan alternatif penanganan masalah banjir yang tepat di kawasan tersebut. Model EPA SWMM 5.1 ini mampu menghitung kuantitas dan kualitas limpasan permukaan dari setiap daerah tangkapan hujan, debit aliran, kedalaman aliran, dan kualitas air di setiap pipa dan saluran selama periode simulasi. Data-data yang digunakan pada penelitian ini adalah peta tata guna lahan untuk penentuan persentase impervious area, data hujan dan data dimensi saluran drainase pada kawasan Jati. Seri data hujan yang digunakan merupakan data hujan jam-jaman, karena tidak adanya data hujan jam-jaman pada stasiun hujan di lokasi penelitian, maka penentuan distribusi hujan jam-jaman dilakukan dengan mengubah lengkung Intensitas-Durasi-Frekuensi (IDF) untuk periode ulang 5 tahun menjadi Hyetograph hujan rencana dengan menggunakan Alternating Block Method (ABM). Setelah semua parameter input EPA SWMM 5.1 ditentukan dan diinputkan, simulasi dapat dilakukan. Simulasi yang dilakukan untuk mengatasi banjir di kawasan ini yaitu dengan 3 (tiga) skenario yaitu dengan mengubah dimensi saluran, perencanaan sumur resapan, dan mengubah arah aliran ke kanal banjir Jati. Dari 3 skenario simulasi yang dilakukan masih terdapat saluran yang meluap, tetapi dari 3 skenario ini, skenario yang lebih berpengaruh dalam mengatasi banjir di kawasan Jati adalah skenario 3.

Indonesia has many islands that are suffering from beach abrasion. This phenomenon has beenoften happening and is categorized in one of the National Disasters. West Sumatra beaches with the totallength of about 600 km stretch along the west side of Sumatra Island where directly opposite to the IndianOcean. The waves from the Indian Ocean in any circumstance may cause abrasion to damage houses andpublic facilities. Factors that affect coastal abrasion include coastal geometry, wave parameters, soil sedimentand beach plantations. An investigation on the plant species and soil sediment on the West Sumatra beach hasbeen done. The effects of the last two factors on beach abrasion are then elaborated in this paper. It is foundthat some beach vegetations have shown remarkable role to reduce abrasion impact. Meanwhile, the type ofsoil sediments in which associated with physical properties showed also significant effect. From this study, itwas found that vegetation roots will protect the beaches together with the soils. This investigation alsoconcludes that coastal endemic plants in the West Sumatra need to be explored as a mitigation action toreduce the abrasion impact.

A high intensity of rainfall experiences flooding in some areas. Flooding can be caused by several aspects, such as inadequate urban drainage, reduce the porous surface due to rapid development and the topography of the area itself. Flood has always been a scourge for the inhabitants of Padang city. Especially when there are a heavy-rain and long duration, certainly flood will hit some places in Padang city. Therefore, many things that must be considered by the local government in overcoming the problem of this flood, including improvements of the drainage system, reforestation and create the polders. In this research, it is described the area of the prone area in Padang city with spatial analysis tools which are approached in the Geographical Information System. Based on the topography of the Padang city, inundated areas and flood direction will be presented in case of the heavy rain occurs. From the analysis, there are several points of vulnerable inundation in Padang city that are generally located in densely populated areas and main roads in Padang city which can be considered for the future planning.

Sinergi antara pemerintah pusat dan daerah, antara pemerintah dan dunia usaha, serta antardaerah sangat diperlukan dalam meningkatkan potensi keberhasilan pembangunan pariwisata berbasis kewilayahan. Kunci utama untuk menciptakan sebuah daerah dengan industri pariwisata yang baik adalah terwujudnya kenyamanan pengunjung. Kenyamanan pengunjung akan bisa terlaksana jika dua variabel berikut terpenuhi yakni adanya budaya dan perilaku masyarakat yang ramah pariwisata dan adanya infrastruktur yang saling berkesinambungan antar destinasi pariwisata. Untuk itu pemerintah pusat dan daerah harus bersama-sama mewujudkan adanya peningkatan infrastruktur kepariwisataan di provinsi Sumatera Barat. Walaupun kaya akan budaya dan kondisi alamnya nan cantik, tidak membuat provinsi Sumatera Barat kebanjiran kunjungan wisatawan. Bahkan untuk tahun 2015 lalu terjadi penurunan kunjungan wisatawan mancanegara sebanyak 13,2%. Untuk itu promosi dan peningkatan infrastruktur pariwisata harus terus dilakukan. Untuk mewujudkan hal diatas, perlu kiranya untuk mengetahui kapasitas infrastruktur di Provinsi Sumatera Barat saat ini dalam rangka mendukung industry pariwisata. Ini dimaksudkan untuk mendapatkan benchamarking atau titik patok bagi pengembangan infrastruktur kedepannya dalam rangka peningkatan aksesibilitas pariwisata Sumatera Barat. Diharapkan dengan penelitian ini dapat mengetahui kondisi eksisting infrastruktur kepariwisataan provinsi Sumatera Barat dan bagaimana strategi pengembangannya kedepan sehingga bisa menambah kontribusi pendapatan daerah dari sektor pariwisata.

Batang Kuranji merupakan satu dari enam sungai yang mengalir di Kota Padang. Batang Kuranji ini sering mengalami banjir diantaranya banjir bandang tanggal 24 Juli 2012 dan tanggal 12 September 2012, terakhir banjir besar terjadi tanggal 22 Maret 2016 yang menggenangi kompleks perumahan, perkantoran dan fasilitas umum di daerah Air Pacah dan kawasan lainnya yang ada di kiri-kanan aliran batang kuranji. Mengingat terdapat beberapa parameter karakteristik daerah aliran sungai dan pola aliran yang mempengaruhi terjadinya banjir, maka diperkirakan ada suatu hubungan yang erat antara karakteristik DAS dan pola aliran tersebut. Hubungan ini sangat penting untuk diketahui sehingga bencana yang mungkin timbul pada suatu sungai yang memiliki karakteristik tertentu dapat diantisipasi. Makalah ini mencoba meneliti Karakteristik DAS berdasarkan morfometrinya dan Pola aliran terhadap terjadinya banjir di Batang Kuranji. Data yang digunakan dalam analisa ini adalah peta topografi TNI angkatan Darat skala 1:50.000, lembar Padang No.1223-II dan lembar Solok No.1323-III serta data curah hujan. Hasil perhitungan Perbandingan antara Qmaks/Qmin = 706/3,17 = 222 jauh lebih besar dari 50; Kerapatan jaringan sungai (Dd) =1,744, tingkat sedang; Tingkat percabangan sungai (Rb) berada antara nilai 5 hingga 6 yang termasuk dalam kategori tinggi; Tekstur jaringan sungai (T)= 1,927, tingkat rendah; Relief Rasio DAS (Rh) = 0,0495; Gradien kemiringan DAS = 6,42%, cukup curam; Pola Aliran Dendritik. Berdasarkan hasil perhitungan tersebut dapat disimpulkan, bahwa Batang Kuranji sering mengalami banjir dan mempunyai tingkat erosi yang tinggi.

Sawah Liat drainage is one area of drainage that the flow of water discharged into the Kuranji River in Padang City. It is a very vulnerable area to the flooding. Flooding was caused by high rainfall, land-use change, and river flooding. This area does not yet have a drainage network system. This research is to plan a new drainage system using the eco-drainage concept of adding a retention pond in the drainage network system. EPA-SWMM model was used to simulate the planned drainage network model and assisted with Global Mapper and ArcGIS for spatial analysis. Six simulation models are performed by combining two models of the drainage network, two land cover models, and two models of rainfall. The results showed that the drainage network models with retention ponds are more effective against controlling flooding. With simulation using a 5-year rainfall return period, there was no flood. For simulations using rainfall data on March 22, 2016, the depth of flooding could be decreasing from 0.2 m to 0.9 m. The retention pond can reduce the 5-year flood volume of 120,200 m3 or 59% of the total 203,710 m3

Development of transportation infrastructure in the region aims to meet the needs of the community to facilitate mobility of people, goods, and services. However, the work of transportation infrastructure requires a large amount of cost while the development budget is limited. Therefore, a careful determination of the priority of road handling is urgently required. In this study, an analysis was conducted to determine the priority of handling strategic roads in Tebo Regency. This study uses the Analytic Network Process (ANP) method with 4 (four) criteria to determine the priority of road handling, namely: engineering, economics, regional potential, and policies. It was found that National Road - Pintas being the first priority with a weight of 0.252, then the second priority for National Road - Lubuk Mandarsah with a weight of 0.23.The third priority is Unit I Rimbo Bujang - Unit XI Rimbo Ulu Road with a weight of 0.211.

The construction of large water resources infrastructure project often involved a joint-operation (JO) project between two or more construction companies. The form of JO can be grouped into two categories - an integrated type and a non-integrated type. This paper investigates the reason of forming a JO project made by companies. The specific advantages and problems of JO project is also analysed in this paper. In order to achieve the objectives, three water resources infrastructure projects were selected as case studies. Data was gathered by conducting 11 semi-structured interviews to project owners, contractor managers, and project staffs. Data was analysed by means of content analysis. It was found that the most fundamental factor to form a JO is to win a competition or tender. An integrated model is in favour because it can reduce overhead costs and has a simple management system, while a non-integrated model is selected because it can avoid a sleeping partner and make contractor more responsible for their own job.

Adanya ramalan akan terjadinya gempa besar yang diikuti oleh tsunami melanda Kota Padang dalam waktu dekat ini sehingga Pemerintah Kota Padang membuat kebijakan dengan membagi kota padang dalam tiga zona kerentanan tsunami, yaitu kerentanan tsunami tinggi (zona merah), kerentanan tsunami sedang (zona kuning) dan kerentanan tsunami rendah (zona hijau). Kawasan zona merah berada di pinggir pantai hingga 1 km kearah timur kota Padang dan merupakan zona yang sangat rentan dilanda tsunami, zona kuning berada 1 hingga 3 km dan zona hijau lebih dari 3 km dari pinggir pantai kearah timur. Dampak dari kebijakan ini, banyak penduduk yang bermukim di kawasan zona merah pindah ke zona hijau yang lokasinya berada disekitar jalan by pass di kawasan Air Pacah termasuk pusat pemerintahan Kota Padang dan kantor-kantor pemerintah serta swasta lainnya. Sayangnya, lokasi yang digunakan untuk pembangunan kompleks perumahan, perkantoran dan fasilitas umum ini berada pada topografi yang kerendahan dimana pada musim hujan selalu tergenang. seperti yang terjadi tanggal 22 Maret 2016 lalu, kawasan ini dilanda banjir besar yang tingginya 1-2 m. Penyebab banjir ini disamping curah hujan yang tinggi, juga akibat luapan Batang Maransi yang mengalir dalam kawasan ini serta masuknya air banjir dari Batang Balimbing tempat bermuaranya Batang Maransi. Batang Balimbing (orde kedua) dan Batang Maransi (orde ketiga) masih dipengaruhi pasang surutnya air laut dan jika hujan turun dengan intensitas tinggi dan bersamaan terjadinya pasang air laut, maka dapat dipastikan kawasan ini akan mengalami banjir. Hasil perhitungan diperoleh elevasi muka air banjir di muara Batang Maransi = + 3,501 m, sedangkan elevasi muka tanah (lahan) di sekitar Batang Maransi adalah + 1,424 m s/d 2,45 m. Jadi tinggi banjir berkisar antara 1,051 m - 2,077 m. Untuk mengendalikan banjir yang sering terjadi di kawasan ini, salah satu upaya yang dapat dilakukan adalah dengan membangun pintu klep di Batang Balimbing tepatnya di muara Batang Maransi sebanyak 5 buah dengan lebar masing-masing 4 m, sehingga air pasang dan banjir dari Batang Balimbing tidak bisa masuk ke Batang Maransi. Selama pintu klep bekerja, debit banjir Batang Maransi di simpan sementara di badan sungai dan kolam retensi, untuk ini Batang Maransi perlu dinormalisasi dengan lebar (b) = 20 m, kemiringan talud (m) = 1,5 dan dalam (h) = 1,478 m serta pembuatan kolam retensi dengan luas 35 ha dan dalam 2,5 m.

A large area of peat swamp forests has disappeared due to either legally or illegally logging, drainage, agricultural conversion, fire, deforestation or large-scale developments for residential centers and industries. In Indonesia, less than 3% of the remaining forest is protected; the rest is available for logging and conversion to other land uses. Over 93% of the remaining swamp forests in Sumatera had been profoundly degraded. Change the land use to agriculture dramatically changes the characteristics of the peat substrate. Once drained, peat is highly flammable, and the fires can burn for month challenging to extinguish. The peat forest change to agriculture practices and other land use supposed to create short or long-term consequences. One of the consequences is surface degradation due to the oxidation process. A set of field measurements has been conducted using Hobo loggers. The measurement aimed at collecting data about the groundwater level and the soil temperature. The data was gathered within one and half year. The measurements were carried out on two conditions: during dry and wet periods. The difference of the model to other approaches into the measurement of land subsidence rate, this model adapts to the characteristics of the soil, the different temperature and the groundwater level over time as three additional factors that strongly affect to the rate of subsidence. The rate of subsidence in Sumatera varies from 2 until 13 cm per year due to the oxidation processes.

In the present study, we provide a land use planning recommendation for land conservation and agro-economical production for the Sumani watershed in West Sumatra, Indonesia, where intensive agriculture has long been practiced. We based our land conservation management recommendations on soil erosion rates using the Universal Soil Loss Equation (USLE) determined in our previous paper (Aflizar et al. 2010). Our land use planning vision is to maintain current land use practices as much as possible. In sites where the soil erosion rate remains less than the tolerable erosion rate (TER) (14 Mg ha-1 y-1; a rate set by the Indonesian government) land use was not altered. When soil erosion rates exceeded the TER, we selected a new land use with a smaller CP-factor than the former land practice to reduce soil erosion rates. The recommended land use planning resulted in a 16.1% change distributed as follows: vegetable gardens with terracing (10%), vegetable gardens with contour cropping (1.8%) and sawah (4.3%). The changes made in the recommended land use plans could reduce soil erosion rates by 88%, a reduction from 58.9 to 7.1 Mg ha-1 y-1, with a total profit loss in agricultural production of only 3.9% in the Sumani watershed.

Purpose The purpose of this paper is to determine the potential landslide of Maninjau area. Design/methodology/approach A literature review and field investigation were undertaken to determine the potential landslide of Maninjau area. The field study includes the physical and mechanical properties of the soil in Maninjau area. Findings The Maninjau Lake area is very prone to landslides. Landslides in Maninjau may happen especially for slopes more than 40 per cent. The action plan must be done as well as the installation of the early warning equipment in the landslide-prone areas and re-plantation on critical ground. Originality/value The paper is very specific as it attempts to discover how prone Maninjau area is to landslides.

The government of Indonesia had provided the Rehabilitation and Reconstruction (RR) assistance to 194,636 houses for communities after 30 September 2009 earthquake in West Sumatra province. The community-based development model was adopted in this housing program aid. This study aims to explore into what extent people's satisfaction with the RR program and to identify the difference of satisfaction level between urban area and rural area. The research was carried out by conducting a questionnaire survey to 200 communities. The beneficiaries were invited to determine their satisfaction level based on 5 Likert scale from 1 as ‘not satisfied at all’ to 5 as ‘absolutely satisfied’. The satisfaction level was assessed by two factors, process of reconstruction and result of reconstruction. It was found that the level of communities’ satisfaction is at average level. The satisfaction level of urban communities is 2.75; while the rural communities is slightly higher at 2.88. The satisfaction level of urban and rural communities with the reconstruction process are at 2.63 and 2.75 respectively; while the satisfaction level with the results of the program is at 2.84 and at 2.95 respectively. Communities’ satisfaction with the result of reconstruction is higher than that with the process of reconstruction. Keywords: post-disaster reconstruction, housing reconstruction, community-based, satisfaction level.

There is a rapid development in Air Pacah area since 1999. This area used to be a remote are and a retarding basin of Oadang City. In 2011, it was designated as the new head quarter complex for Padang City goverment. One of the negative impact of its development was the increase of flood frequency. In order to mitigare the flood, goverment conducted a flood control project at Maransi River which passes this area. However, this project has not completed yet due to land acquisition problem Accordingly, this paper aims to identify community perception on flood causes and into what extent the flood control project has benifited the community. Thirty semi-structure interviews were conducted between May and October 2015 and analysed using descriptive statistic and content analysis method. It was found that community feel that there has been an increase in flood frequency, flood depth, and flood duration. There are four dominant factors that have significant impact on flood, rain duration, lowinfiltration area, massive construction of real estates and offices, and bad drainage system. Community who live exacly next to the construction site has benefited from the flood control project, on the other hand community at the upstream has not feel the positive impact yet because the construction halted due to land aquisation problem. As a result, it is strongly recomended that goverment to immediately acquire the land needed for the flood control Project. Keywords: community perception, flood, flood causes, flood control, land acquisation

The implementation of community-based approach, where community can control a government owned infrastructure project, is rarely found. However, Sumatra River Basin Organization (BWSS) V successfully implemented a small scale irrigation project using this method in West Sumatra Province, Indonesia. This paper aims to describe how this policy was implemented, highlight its milestones, and discuss the advantages of its application. A detailed literature review and semi structured interviews were conducted to achieve the objectives. It was found that the implementation of community-based approach can bring about a sense of belonging, sustainability, and a source of income for the community. Hence, the project was finished on time within budget with high quality materials. In some cases the quantity of the project was more than it was targeted. The key policy that contributed to the success was trusting community to control the project and making sure that the proposed project came from the community.

The Liquefaction Potential Assessment in a Sosil deposit is an Important aspect of earthquake engineering practice since its contributtion to the safety of construction. The Physical properties of sand oil that include grain size and density had known give effects to the liquefaction resistance. Those Physical Properties of sand oil associated to liquefaction resistance have been studied in laboratory. The new method as a results of that study is demonstrated here to assess the liquefaction potential. The example case i a real construction design of reclamation hore in order to develop a new port in Medan, Indonesia. Since the limitation of reclamation source mterial, it founds that the gradation of the ready user materils are suspect to liquefaction. Then, using the new methods, the solution to treat those material as part of the construction requirement. The treatment to be accomplished is compaction efforts to reach a certain relative density in order to avoid the possibility of liquefaction on site.

Pengalaman di Negara-negara yang telah maju menunjukkan bahwa konsep "TECHNOPARK" sudah teruji kebenarannya dalam kontek mendorong Percepatan Menumbuhkembangkan industri dan bisnis terutama untuk yang skala kecil dan menengah di daerah-daerah sampai wilayah perdesaan.

Beach abrasion is one of the national disasters that concern the Indonesian government. This disaster has resulted in adverse coastline changes in West Sumatra Province. The mainland area has been lost for hundreds meters due to abrasion. A field study has been conducted and found that beach without vegetations is very vulnerable to abrasion than the beach with vegetations. In some place, abrasion protection has been done by using hard structures but this way is not natural and attractive. A field investigation also found that several types of endemic beach vegetation in West Sumatra can live for decades till now. This condition shows that beach vegetations can be used for beach protection purposes against abrasion. This study describes the mechanism of vegetation root in protecting beaches against abrasion using numerical simulation. Engineering parameters for modeling were obtained from mechanical testing of beach sand samples. The simulation results show that vegetation roots give the unity effect to the surrounding sand into a large mass. This unified soil mass that come down into the bottom provides mechanical resistance against the pull force. The simulation results explain the root mechanism of vegetation in protecting beach against of abrasion

The purpose of the study is to look at changes in land use and hydrograph models of Danau Limau Manis Sub-watershed using data 2011 until 2015.The results shows the change of land use of Batang Kuranji Watershed, Sub DAS Danau Limau Manis can decreased 3.03% from 2011 to 2015. It due to the opening of new land. While shrub rose rose 0360%, because was due of changes of forests that have not done processing. For an others using of the land the number increase 3.40%. It due to changes of forests and shrubs into failure land.. As the runoff coefficient (C) does not occur any significant change that is from 0.405 into 0.408. Peak discharge calculated by the Nakayasu method 128.02 m3 / dt, was greater by Rational method of 127,52 m3 / dt is caused no difference in the approach used.

The 1997, 2010, and 2015 El Nino events have been recognized worldwide as a primary factor of decreasing biomass productivity. Its effects occur at farm as well as regional scale. Yet some still think that the effect is only perceived by farmers directly. We proposed a simple method to describe that its effect at catchment scale is not negligible. For this purpose, we analysed an upstream catchment in West Sumatera that normally receives high rainfall up to 5000 mm per year. This catchment is in pristine condition due to its status as national park. We used satellite and ground monitoring systems i.e . rainfall and stream water level. Satellite data such as DEM (Digital Elevation Model) used to trace river networks is acquired from ASTER GDEM in 30 m resolution. To monitor vegetation health, we used NDVI (Normalized Difference Vegetation Index) and EVI (Enhanced Vegetation Index) on board MODIS (MODerate resolution Imaging Spectroradiometer) Terra (daytime) MOD13Q1 (250 m resolution). Catchment delineation was performed using local land use map. Time series of EVI and NDVI was processes for year 2015, comprising 23 datasets. Rainfall data from year 1980 to 2012 from 9 stations and water level at the main river were analysed. We found the trace of 1997 El Nino very clearly through rainfall anomalies at all stations. As for the 2010 event, the pattern was not consistent across all rainfall stations. The 2015 event was not imminent until late October 2015. Throughout the year, NDVI remains above 0.8. In late October, maximum NDVI dropped below 0.4. This coincides with very low water level in the stream. The same pattern was also found in two neighbouring catchments with similar land use, Kuranji and Air Dingin, and Tampo catchment. This proves that the 2015 El Nino did not only threatens farmers, but also other aspects that depend on vegetation health and stream flow. Both methods are proven to be robust and may be used as an alternative way to monitor vegetation health and the impact of global climate change for ecology and water management such as domestic water use, irrigation and flood control.

Heavy rains on Monday, 21/3/2016, which flushed the city of Padang, West Sumatra, causing floods and submerged thousands of homes at local residents. This time called the flooding the worst experienced by the region in recent years. Head of Logistics Emergency and Disaster Management Agency said flooding in Padang city West Sumatra at this time was the worst, because it contributes to soak the areas that usually never flooded. The purpose of the study is to look at changes in land use and hydrograph models of Batang Air Dingin watershed using field data.The results shows the change of land use of Batang Air Dingin Watershed can decreased 1.57% from 2011 to 2015. It due to the opening of new land. While shrub rose rose 0.70%, because was due of changes of forests that have not done processing. For an others using of the land the number increase 1.75%. It due to changes of forests and shrubs into failure land.. As the runoff coefficient (C) does not occur any significant change that is from 0.443 into 0.445. Peak discharge calculated by the Nakayasu method 179.274 m3 / dt, was greater by Snyder method of 177.150 m3 / dt is caused no difference in the approach used.