Modeling and monitoring the impact of storm water artificial recharge on groundwater : case study : Beit Lahia municipality infiltration basin

مقدم أطروحة جامعية

al-Ramlawi, Khalid Said

مشرف أطروحة جامعية

Nassar, Abd al-Majid
Mughir, Yunus

الجامعة

الجامعة الإسلامية

الكلية

كلية الهندسة

القسم الأكاديمي

قسم الهندسة المدنية

دولة الجامعة

فلسطين (قطاع غزة)

الدرجة العلمية

ماجستير

تاريخ الدرجة العلمية

2010

الملخص الإنجليزي

The main source of water in Gaza Strip is the shallow aquifer which is part of the coastal aquifer.

The quality of the groundwater is extremely deteriorated in terms of salinity and nitrates.

Artificial recharge is a way to improve the ground water quality and quantity.

This research investigates the impact of storm water that is artificially recharged into the groundwater quantity and quality.

The newly constructed Biet Lahia Municipality infiltration Basin is considered as a case study.

Two methods were used : 1) laboratory analysis, where samples were taken from the storm water in different times of winter and from groundwater wells surrounding the basin and 2) groundwater flow and quality models were developed for the basin using MODFLOW and MT3D.

The first method results showed that the quality of storm water in Biet Lahia infiltration basin is acceptable according to World Health Organization (WHO) in many parameters as No3-, Cl-, Mg+2, Ca+2, Na+1, k+, detergent, turbidity, TSS, TDS, and hardness.

However, the Fecal Coliform in storm water is not acceptable.

The quality of groundwater in the area surrounding the basin is not acceptable in terms of nitrate.

Therefore, the artificial recharge of storm water to the groundwater, will work on reducing the concentration of nitrate in the ground water.

The simulation of the groundwater flow model showed that the groundwater mound beneath the center of the recharge basin can be expected to rise to about 25 cm above the present water table in winter, and then drop in the summer and so on.

This makes groundwater level oscillatory near the basin.

The model simulations indicate that the water level will be increased in the area and the cone of depression will diminish substantially due to the infiltration.

The simulation using MT3D showed that the concentration of nitrate in the groundwater in the study area is reduced since the infiltrated storm water has fewer nitrates than that in the groundwater it also showed the path lines for imaginary particles that are infiltrated in the recharge area will spread radially about 100 m after 2 year, 250 m after 10 years, 400m after 20 years A monitoring system was developed to measure the impact of groundwater in the infiltration basin in the future, by using monitoring wells around the basin, where the location of these wells were based on the results of groundwater models Alternative of recharging treated wastewater in the basin was tested.

The simulation of the model showed that the groundwater mound beneath the center of the recharge basin will be about 1.2 m above the present groundwater level after 1 year.

The native groundwater downstream of the recharge area will gradually be influenced by the water originating from the infiltrated water and the cone of depression will diminish substantially due to the infiltration.

Therefore, it is recommended to increase the number of infiltration basins in Gaza Strip to make use of all available storm water and treated wastewater as a means to reduce the scarcity of water.

التخصصات الرئيسية

علوم الأرض و المياه و البيئة

الموضوعات

• المياه الجوفية
• فلسطين
• بيت لاهيا
• قطاع غزة

عدد الصفحات

112

قائمة المحتويات

• APA
• MLA
• AMA

لغة النص

الإنجليزية

نوع البيانات

رسائل جامعية

رقم السجل

BIM-304807