الخرائط الرقمية لخصائص المياه الجوفية في محلتي السواوة و الآمان بمنطقة المحجوب : دراسة مقارنة باستخدام نظم المعلومات الجغرافية

Abstract EN

The research aims to analyze the spatial distribution of the qualitative characteristics (physical and chemical) of groundwater in the localities of Al-Sawawa and Al-Aman, and to produce digital maps for them using geographic information systems based on the results of the analysis of 20 samples of groundwater wells in the laboratory to determine their characteristics.

It was appreciated Hydrogen Ion Concentration (pH), Electrical conductance (EC), Total dissolved salts (TDS), Nitrate, chloride, magnesium, calcium and bicarbonate ions, and comparison of results with Libyan and international standards for drinking purposes.

The results showed spatial differences for the qualitative characteristics (chemical and physical) between the water of the groundwater wells in the two study areas, whereas the pH recorded the highest value of 7.50 mg / liter in well 6,it reached the lowest value of 6.94 mg / liter in well 8 in the Sawawa area, while it was between 7.52 mg/L and 6.65 mg/L in Al-Aman area.

Also, the results indicated that the values of the total dissolved salts reached the highest 4556 mg / liter in well 6, while the lowest was 1198 mg / liter in well 9, and nearly 10418 in well 17 and about 1970 mg / liter in well 18 in Al-Sawawa and Al-Aman localities, which made it outside the permissible limits for domestic use in drinking according to Libyan and international standards, While calcium concentrations in groundwater wells ranged between 120 and 400 mg/liter in Al- Sawawa locality, it reached between 200 and 400 mg/liter in Al-Aman locality, at a rate of 206 mg/liter, and the average chloride in groundwater in the study area was about 1350 mg/liter, and its concentration ranged Between 532.5 in well 13 and 1881.5 mg/L in well 15 in Al- Sawawa locality and between 781 and 4331 mg/L in Al-Aman locality.

The study produced high- resolution digital Maps showing the geographical distribution and qualitative characteristics of groundwater.