EIA Study- Final Report-May 10 - UNDP

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Environmental Impact Assessment Khan Younis Wastewater Treatment Plant May 2010 Table 6.2: NO3 Plume Distance from Infiltration Basins Year North West Towards the Sea Plume Distance from Infiltration Basins (m) South East North East Towards the Towards Border Middle South West Towards Rafah 2011 1,000 650 1,000 1,100 2015 2,250 1,250 1,900 1,900 2018 3,000 1,600 2,400 2,200 2020 3,500 1,800 2,700 2,500 2025 3,750 2,000 2,880 2,800 The closest municipal well in the area is located at about 4.4Km in the north-west direction of the proposed infiltration area (Al Madina Riadea Well). Accordingly, the infiltrated water will not reach any municipal well until 2025. 6.2.1.2. Impacts on Water Quantity: As field investigation presented earlier, the water level elevation is around 10m AMSL and the saturated thickness of the aquifer is almost 10m thick. During the infiltration of treated waste water, the saturated thickness become more than 50m at the end of simulation (year 2025) which means that more than 40m dome depth (thickness) under the recharge basins. Illustrative different maps of the simulated groundwater level elevation are shown in the following figures for different years (year 2010, 2015, 2018 and 2025respectively as figure 6.3a, 6.3b, 6.3c and 6.3d). The impact of infiltrating treated wastewater in Al Fukhari Area on the groundwater can be considered positive due to the fact that the current water resource in the area almost not exist due to limited saturated thickness and highly brackish water. After 15 years of infiltration in the area, there will be a local aquifer existence with an average saturated thickness of more than 50m and extend in a radius of about 4km from the infiltration basins. The water quality will improve as well by diluting the existing brackish water. The infiltrated treated waste water will never reach any adjacent municipal well in the area as shown in previous figures. The infiltrated treated wastewater can be used for irrigation purposes in the nearby agricultural areas, which can be considered as recovery wells, knowing that the simulated figures presented are for spatial distribution and water level elevation without any kind of groundwater recovery, hence if a recovery wells is being considered, the plume will shrink as well as the water level elevation will drop from +50m AMSL based on the abstracted groundwater. SOGREAH/UG CONSULTANTS 96
Environmental Impact Assessment Khan Younis Wastewater Treatment Plant May 2010 Figure (6.3a): Simulated Water Level Elevation Year 2010 (+20m) Figure (6.3b): Simulated Water Level Elevation Year 2015 (+30m) Figure (6.3c): Simulated Water Level Elevation Year 2018 (+35m) Figure (6.3d): Simulated Water Level Elevation Year 2025 (>+50m) Figure 6.3: Simulated Water Level Elevation for year 2010-2025 SOGREAH/UG CONSULTANTS 97
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EIA Study- Final Report-May 10 - UNDP

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