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Construction and demolition waste (CDW), produced at various stages of construction projects, is a major problem for the construction industry. This waste has led to an international issue that is widespread and enduring. This research used a quantitative method in two stages to suggest workable options to fix this significant problem. An online survey of Egyptian construction industry professionals was conducted during the first round to gauge how three key factors affected the safe disposal of CDW (SDCDW). Management of route, collection, and transportation (MRCT), determination of illegal waste dumping sites (DIWDS), and construction waste tracking and scheduling (CWTS) are the three main factors. The development of a comprehensive framework for SDCDW, in support of Egypt's vision 2030, involved multivariate statistical analysis using the structural equation modelling (SEM) method in the second stage. The findings showed that these three factors had a favourable impact on SDCDW in Egypt. This was evidenced through mentioning the acceptable effect sizes of these three factors towards SDCDW; where MRCT showed moderate effect towards SDCDW with a value of 0.16, CWTS showed small effect towards SDCDW with a value of 0.137, and DIWDS showed small effect towards SDCDW with a value of 0.052.The study also discovered that MRCT is more effective in treating SDCDW with a model path coefficient of 0.383. However, DIWDS is the least effective when it comes to SDCDW with a model path coefficient of 0.191. In support of Egypt's Vision 2030, this paper makes concrete suggestions for the government and the construction sector regarding the safe disposal of CDW. [ABSTRACT FROM AUTHOR]

The structural mechanisms and stratigraphic features of the earth strongly control the hydrocarbon potential of any oil field. In this study, we selected the Sufr El Dara offshore oil field, Southern Gulf of Suez, Egypt, as the area of interest. This field has a complex structure and stratigraphic features owing to being located in the Morgan accommodation zone. The lateral and vertical facies are substantially different. Conventional techniques applied to open-hole logs and seismic data have failed to produce a reliable model of the study area. To minimise the risk factors and select the best location, we developed a workflow to integrate different techniques to describe the complexity of the study area. Our interpretation is based on detailed reservoir correlations. As the main tool, we used comprehensive interpretation of the well data (e.g., E-logs and dipmeters) to define the pattern of the faults and the extent of the reservoir. In addition, we incorporated seismic techniques (e.g., spectral decomposition and unsupervised vector quantiser for waveform classification), first used in the Gulf of Suez region, which considerably impacted the mapping of the structure and stratigraphic features at the reservoir level. We used multiple targets for interpretation, although our focus was constructing the main structural model of the study area at the Kareem level. We found that the proposed geological model is a powerful predictive tool for locating structural closures and reservoirs. The model will assist in the exploration and development not only of conventional structure plays (clysmic trends) but also of more unconventional stratigraphic plays focusing on Kareem fans, which were produced by the combination of both stratigraphic and structural traps in the study area. • Gulf of Suez rift basin. • Offshore Gulf of Suez. • Spectral decomposition in rift basin. • Multi-seismic attribute. • Waveform classification. [ABSTRACT FROM AUTHOR]

This study was carried out to investigate the abundance, distribution, diversity and condition factor of Mormyrids in Oyan Dam lake, Abeokuta North Local Government Area of Ogun State, Nigeria. The fish were sampled from the catches of the fishermen in Oyan Dam lake, which used gillnets of 30-80 mm laterally stretched mesh size. The fish were sampled monthly between February and September 2011, at two different sites (Imala and Ibaro). The results revealed that a total number of 100 fishes of six species belonging to the family Mormyridae were collected. Numerically, catches were dominated by Mormyrus rume (34%), Hyperopisus bebe (30%) and Petrocephalus bane (24%). Together, these species comprised 88% of all collected individuals. Marcusenius ihuysi was rare and least in number representing 1% of the fish caught. The results showed that only four species were recorded in the dry season, namely Mormyrus rume, Hyperopisus bebe, Petrocephalus bane and Mormyrus deliciosus while five species were recorded in the wet season particularly in September. Mormyrus deliciosus, was not recorded in the wet season. In terms of body weight, the highest mean value was recorded for Mormyrus deliciosus (435.71 ± 95.71), followed by Mormyrus rume (143.82 ± 5.55) and Hyperopisus bebe (123.5 ± 5.26) while Petrocephalus bane was the least one (95.00 ± 8.56). The results also showed that the condition factor during the wet season (4.18) was higher than the condition factor of the dry season (3.51). Simpson's index was used to determine the species richness, while Shannon-Wiener's Index was used to evaluate species diversity; species evenness was equally evaluated using Pielou's Index. The indices of diversity included (d) = 0.31 and 0.23, H = 1.18 and 1.53 and E = 0.851 and 0.853 respectively for the two sites at Oyan Dam lake. The estimates from these indices indicated a low fish species composition and richness, also unevenness in the population of Mormyrids in Oyan Dam lake. Therefore, it will be advisable to regulate the activities of fishers in the water body to allow future increase in the abundance of this species. [ABSTRACT FROM AUTHOR]