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21 results on '"Rahardjo, Noorhadi"'

4. Analysing the Driving Forces of Carbon Stock Change for Climate Change Mitigation.

Author

Utami, Westi, Sugiyanto, Catur, and Rahardjo, Noorhadi

Subjects
CARBON offsetting, CLIMATE change mitigation, LAND management, REFORESTATION, ENVIRONMENTAL management
Abstract

The management of land use is a significant factor in maintaining the equilibrium of carbon stocks. However, the expansion of infrastructure, mining, industry, trade, economic activity and population has resulted in significant changes to land use, which have led to a reduction in carbon stock reserves. The objective of this study was to map the level of carbon stock reserves and to analyse the variable driving forces of carbon stock change. The variables used in this study encompass 21 distinct types, including: socio-economic, physical, locational, land and spatial planning aspects. The dependent variable comprises the level of carbon stock by land use type in 2014, 2018, and 2022. Spatial regression analysis was employed to ascertain the driving forces that exert a predominant influence on alterations in carbon stock reserves. The results of the spatial regression analysis between the dependent and independent variables yielded a highly significant correlation, as indicated by the R-square value exceeding 0.09. This condition is influenced by the use of complex and comprehensive variables, as well as the use of spatial regression which is able to analyse between variables by considering spatial aspects. The results of the analysis demonstrate that location variables (city centre, airport and road accessibility), physical variables (relative relief) and land variables (land title status) are the most dominant variables. The analysis of the driving force of carbon stock change represents a crucial aspect of land use management and the control of land use change from areas with high to low carbon stock. In order to maintain the balance of carbon stock reserves, it is essential to optimise mangrove areas and implement reforestation initiatives in forest areas. [ABSTRACT FROM AUTHOR]

Published
2024
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7. Temporal monitoring of surface runoff using remote sensing in Pabelan watershed, Central Java.

Author

Nasikha, Maulida Allya, Sudaryatno, and Rahardjo, Noorhadi

Subjects
LAND cover, REMOTE sensing, RUNOFF, WATERSHEDS, LANDFORMS, VALUE (Economics)
Abstract

In general, current spatial planning tends to focus on the need for land and its economic value. The land has a limited capacity while the need for land continues to increase. Numerous watersheds in Indonesia are enduring the impact of land changes due to exploitative land use. Changes in watershed conditions as a result of uncontrolled land expansion without regard to environmental aspects often lead to undesirable conditions, in addition the lack of consideration of environmental aspects can lead to various disasters. So that there is a need for spatial planning so that the fulfillment of land and space needs still pays attention to environmental aspects. This study aims to map the spatial distribution of surface runoff using remote sensing data in the Pabelan watershed and to describe the relationship between land cover changes and surface runoff in the watershed. Remote sensing is used to determine changes in land cover and surface runoff in this watershed. Analysis of land cover changes and mapping of the surface runoff area was carried out to describe the relationship between land cover changes and surface runoff. The method used in the surface runoff mapping was made using the Cook. The results of this study are in the form of land cover maps of the Pabelan watershed in different years, visualization maps of surface runoff, and the relationship between land cover changes and surface runoff. The results show that surface runoff in 2020 is still dominated by the same runoff class as the runoff class in 2009 and 2015, which is dominated by the normal class but has a different area. The normal class in 2020 has an area of 69,92 km2. In 2020, the normal class has the widest area compared to previous years. The low runoff class also has the most extensive area this year. In 2009 the low runoff class had an area of 0,27 km2, in 2015 it was 0,48 km2 while in 2020 it was 1,49 km2. The high runoff class in 2020 is the lowest compared to the previous year. In 2009 this high-class area was 46,12 km2, in 2015 it was 43,42 km2 and in 2020 it was only 40,46 km2. The extreme runoff class has the widest area this year. In 2009 the extreme runoff class was 0,23 km2, in 2015 it decreased to 0,17 km2, and in 2020 it was 0,36 km2. In this study, it can be concluded that land cover change is not a major factor in the formation of surface runoff. There is another factor, which can affect the surface runoff. [ABSTRACT FROM AUTHOR]

Published
2023
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11. Status of groundwater and river water quality around the location of illegal gold mining activities in Lantung District, Sumbawa.

Author

Barakati, Kevin Philips, Adji, Tjahyo Nugroho, and Rahardjo, Noorhadi

Subjects
GROUNDWATER, GOLD mining, LEACHING, QUALITY standards, MERCURY
Abstract

The Lantung area is one of the places on Sumbawa Island with a large gold deposit. One of the activities of the Lantung people that has the potential to damage the environment is separating gold from mercury. This study aimed to examine the activity of the gold leaching process and the level of contamination of groundwater and river water due to gold processing from amalgamation by mercury (Hg+) waste. In this study, sampling was carried out for each location, namely two samples of wastewater, six samples of river water, and two samples of groundwater, which were then tested in the laboratory on the parameters of mercury and TSS. At the same time, pH was measured in the field. Furthermore, from the survey results, it was found that the use of mercury was ±150-250 mL at each gold processing location. The results showed that all samples from wastewater (tailings), groundwater and river water were contaminated with mercury with levels exceeding the acceptable quality standards. Furthermore, the status of water quality using the Pollution Index (IP) method shows that wastewater is light to moderately polluted, groundwater is lightly polluted, and river water is also lightly to moderately polluted. [ABSTRACT FROM AUTHOR]

Published
2023
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13. Unmanned Aerial Vehicle (UAV) Data as a Land Cover Data Renewal in Pandanrejo Village, Kaligesing Sub-District, Purworejo

Author

Rahardjo, Noorhadi, Aunurrahim, Abghy, Asri, Galuh Hayun Mustika, Rahardjo, Noorhadi, Aunurrahim, Abghy, and Asri, Galuh Hayun Mustika

Abstract

The high activity of the community caused changes of the land cover in a region. The changes is needed to be renewed to support the actualisation of data in the field with the data on the map. Remote-sensing technology development is able to make the data renewal of a certain area to get easier. One of the strategies that can be done to make this data renewal is by using UAV technology. UAV or Unmanned Aerial Vehicle has various advantages, such as: it has real time and actual data. Moreover, it is cheaper and more effective technology which can be used to get high-resolution data. Pandanrejo village has a variety of land cover types according to its relief. Based on the visual interpretation and classification elements, there are 23 classification classes that refer to classification for detail scale mapping. Based on the aeral photograph, UAV can provide a detail data extraction on a 1:5000 scale. On that scale, field’s appearences, in the form of its vegetations, buildings, and other kind of appearances in Pandanrejo Vilage, Kaligesing Sub-district, Purworejo, can be seen and identified in detail way. This research is aimed to: (1) analyze and make a visual interpretation to what extent UAV can be used to make a land cover data renewal and land cover mapping and (2) provide the detail information about to what extent UAV can be used to make a land cover data renewal and land cover mapping. The method employed in this research was to do a visual interpretation by employing on screen digitization to get the land cover classification in order to make the land cover data renewal of Pandanrejo Village. The results of this research are the Pandanrejo Village’s land cover mapping based on the analysis and visual interpretation of UAV data and also the update of Pandanrejo Village monograph data based on the interpretation process and calculation of the Pandanrejo Village’s land cover area.

Published
2021

16. Kajian Kualitas Lingkungan Permukiman di Daerah Pinggiran Kota Kasus di Desa Ngestiharjo, Yogyakarta

Author

Ekartaji, Prittaningtyas, Yunus, Hadi Sabari, and Rahardjo, Noorhadi

Subjects
Desa Ngestiharjo, daerah pinggiran kota, kualitas lingkungan permukiman, settlement’s environment quality, urban periphery, lcsh:G1-922, lcsh:Geography (General)
Abstract

Penelitian ini mengkaji kualitas lingkungan permukiman di daerah pinggiran kota khususnya di Desa Nges-tiharjo, Kecamatan Kasihan, Kabupaten Bantul. Tujuan penelitian ini adalah (1) mengkaji sebaran kualitas lingkungan permukiman di Desa Ngestiharjo, (2) mengkaji kondisi sosial ekonomi penduduk di Desa Ngestiharjo, (3) mengkaji hubungan partisipasi penduduk dengan kualitas lingkungan permukiman, dan (4) mengkaji faktor sosial ekonomi, biotik dan abiotik yang berpengaruh terhadap kualitas lingkungan permukiman di Desa Ngestiharjo.Metode penelitian yang digunakan dalam penelitian ini metode penelitian terkait dengan eksistensi populasi adalah metode penelitian sampling, terkait dengan karakteristik obyek penelitian adalah metode survei deskriptif kualitatif, dan terkait dengan cara analisis adalah pendekatan kualitatif dan kuantitatif. Teknik sampling yang digunakan adalah teknik proporsional random sampling. Responden penelitian ini adalah kepala keluarga yang dipilih acak berdasarkan strata dan propor-sional. Teknik analisis data dengan menggunakan skoring dan pembobotan, uji korelasi Spearman, uji regresi ganda dan analisis deskriptif kualitatif dengan menggunakan tabel silang.Hasil penelitian ini adalah (1) pola sebaran kualitas lingkungan permukiman di Desa Ngestiharjo disebabkan karena adanya perbedaan keteraturan bangunan dan per-bedaan kualitas lingkungan rumah; (2) tingkat pendapatan kepala keluarga mempunyai hubungan yang lemah terha-dap kualitas lingkungan permukiman dengan nilai koefisien korelasi 0,270. Hubungan yang lemah tersebut disebabkan kondisi lingkungan permukiman dan kondisi rumah yang baik tidak seluruhnya merupakan hasil investasi pendapatan si kepala keluarga tetapi merupakan hasil warisan dari orang tua si kepala keluarga; (3) tingkat partisipasi kepala kel-uarga mempunyai hubungan negatif dan lemah terhadap kualitas lingkungan permukiman. Nilai koefisien korelasin-ya adalah sebesar -0,207. Kegiatan pengelolaan lingkungan permukiman di Desa Ngestiharjo tidak memperbaiki fak-tor-faktor yang berpengaruh terhadap kualitas lingkungan permukiman; (4) faktor sosial-ekonomi, biotik, dan abiotik yang berpengaruh terhadap kualitas lingkungan permukiman di Desa Ngestiharjo adalah keteraturan bangunan (t = 3,637), tahun sukses pendidikan kepala keluarga (t=3,155), tingkat pendapatan ( t = 2,598), dan persentase vegetasi (t = 1,760). ABSTRACT This research was conducted to study the quality of settlement environment in urban periphery with Desa Ngesti-harjo, Kecamatan Kasihan, Kabupaten Bantul as locus of study. The objectives of this research were (1) to analyze the dis-tribution of environmental quality of the settlements in Desa Ngestiharjo; (2) to analyze the socioeconomic condition of the residents of Desa Ngestiharjo; (3) to analyze the relation between the community participation and environmental quality of the settlements and (4) to analyze the socioeconomic, abiotic, and biotic factors contributing to the enviromental quality of the settlements in Desa Ngestiharjo.The method used in this research that : (1) associates with population is sampling method; (2) associates with objects characteristic is qualitative descriptive survei, and (3) associates with data analysis is the quantitative and qualitative method. Proporsional random sampling employed in this research. The respondents were heads of the household which were stratified and proportionally selected. The data were then analyzed using scoring and weighting, Spearman correlation, multiple liniear regression,and qualitative decriptive analysis using crosstab methods.The results of this research were (1) The distribution of the environmental quality of the settlements was found as result of the differences in building regularity and housing environmental quality; (2) The heads of household had a weak correlation with the quality of settlements, as indicated by the correlation coefficient of 0,270. The weak correlation stemmed from the fact that the good environmental quality of the settlement and the housing were not complete results of the income of the head of households, but was inherited from the predecessors; (3) The heads of household particiption was found to be negatively affected the enviromental quality of the settlements, indicated by the coefficient correlation of -0,207. The management of settlements environment did not improve the factors contributing to the environment quality of settlements; (4) Socioeconomic, abiotic, and biotic factors contributing to environment quality were housing regularity (t = 3,637, educational level of the heads of the households indicated by the years spent in educational institutions (t=3,155), level of income (t = 2,598), and percenta-tion of vegetation coverage (t=1,760).

Published
2016

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