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Assessment of groundwater vulnerability to pollution in an Arid environment

Slimani Rabia, Charikh Messaouda, Aljaradin Mohammad

Archives of Environmental Protection

2023

Vol. 49, no 2

50--58

This study focuses on mapping the groundwater’s vulnerability to pollution in the region of Ouargla, located in the North-East of the northern Sahara, exposed to potential risks of alteration. By applying the methods (GOD, DRASTIC, and SINTACS), coupled with a Geographic Information System (GIS), we were able to identify a medium to high vulnerability trend. In light of the results recorded, the DRASTIC and SINTACS methods prove to be more suitable for our study region. This makes it possible to highlight the recharge zones and land use as being the most vulnerable in the territory studied. The GOD method presents a strong vulnerability trend over 77.02% of the study area. Such a result is directly related to the depth of the water table. It can therefore be argued that this method is far from being representative of the reality on the ground because of these very heterogeneous characteristics.

Materiały budowlane z zabytkowego zamku "Ksar Metlili" (Sahara Algierska)

Hamiane M., Kielski A., Wodnicka K., Bamoun A., Dressi S.

Materiały Ceramiczne

2008

R. 60, nr 3

130-131

Zbadano materiały budowlane użyte do budowy zabytkowego XII wiecznego zamku "Ksar Metlili" na terenie Sahary Algierskiej oznaczając gęstość, gęstość pozorną, porowatość otwartą, zamkniętą i całkowitą, nasiąkliwość wodną i skład fazowy. Stwierdzono, że zamek został zbudowany z surowców lokalnych takich jak kamień gipsowy (temchent), piaskowiec, piasek, glina i drewno palmowe. Okazało się, główną przyczyną niszczenia (degradacji) budowli jest wysoka porowatość użytych zapraw gipsowej i wapiennej. Wskazano na sposoby prowadzenia prac konserwatorskich.

The building materials used in the construction of historic castle from XII century "Ksar Metlili" in the Algerian Sahara was analysed. Bulk density, specific density, total, open, and closed porosity, water absorption and phase composition was measured. It was found that the castle was built with local raw materials such as plaster stone (temchent), sandstone, sand, clay and palm. It was concluded that, the main cause of destruction (degradation) of the buildings was high porosity plaster and limestone mortar. Ways to carry out conservation work were pointed out.