Salah Ajjur currently is a PhD candidate in Sustainable Environment at Hamad Bin Khalifa University in Qatar. He completed his MSc in Environmental Engineering at IUG in 2013. Salah does research in groundwater resources, hydrological modelling and climate change.
Flood hazard mapping using a multi-criteria decision analysis and GIS (case study Gaza Governorate, Palestine)10 Jan 2020
As a result of ongoing urbanization and climate change, urban areas (e.g., Gaza Strip (GS)) experienced many floods recently. These floods posed threats to human lives and turned many regions to disaster areas; however, municipalities’ managers attempt to combat this challenge. This study aims to present a geographic information system multi-criteria decision analysis (GIS-MCDA) method to identify flood-prone areas. Five criteria are considered: distance to stormwater drainage network, land use (cover), height, slope, and groundwater depth. Three steps are carried out to classify the areas according to its vulnerability to flooding into five categories: “Very high,” “High,” “Moderate,” “Low,” and “Very low.” These steps are the following: standardization, weighting, and overlaying of the criteria. After that, a sensitivity analysis was performed to show how areas’ classes are changed. The proposed methodology was demonstrated in Gaza Governorate (Palestine) were most people and infrastructures were severely affected by flood in the last two decades. The results show that Nafaq Street, Zaytoon, Toffah, and Daraj regions are the most vulnerable areas in Gaza Governorate. This was consistent with historical floods inundation data. This study is a powerful tool with low cost and time that guides decision-makers to allocate the proper management in flood-prone areas in Gaza Governorate. Further research includes taking advantage of the flood-prone area map to implement spreading managed aquifer recharge projects.
Identification of intrinsic suitable sites in Gaza Strip for the application of artificial groundwater recharge using a geographic information system multicriteria decision analysis30 Nov 2019
Gaza coastal aquifer is perceived as the only natural source of water in Gaza Strip (GS), providing water for about 1.9 million inhabitants living in an area of 365 km2. GS annual mean precipitation is about 325 mm, but this precipitation is not exploited properly to feed the aquifer. This study aims to identify the intrinsic suitable sites in GS for the implementation of artificial groundwater recharge. The most suitable sites were identified using a geographic information system multicriteria decision analysis based on four criteria: hydrogeological aptitude, soil, slope, and land use. Three steps were carried out to find these sites: screening for suitable areas, suitability mapping, and sensitivity analysis. The suitability map was divided into two zones after the screening: available and unavailable. Available areas (70% of total GS area) were further divided into four classes according to the weighted linear combination ranking. The findings show that 60% of GS areas are suitable for artificial recharge application. After that, seven current storm water‐collection basins were assigned. Five of them were found to be corresponded with sites suitability analysis. This map is a powerful tool for implementation of recharge techniques in GS.