Assessment Of Diyarbakır City Centre Groundwater Quality And Obtaining Thematic Maps With GIS Technic.

Abstract

Through increasing world population, due to pollution and climate change, potable water and usable water is decreasing. Groundwater is most important an alternative water source. Therefore, as the determination of groundwater potential, the ground water quality must be measured on a regularly. Geographic Information System (GIS) is a computer program which is used as an extremely popular in recent years. Continuous upgrade with GIS data, analysis and modelling can be done to places which are not derived.

In this study, groundwater quality and water features of Diyarbakır urban which contains Bağlar, Kayapınar, Sur and Yenişehir residential areas, aimed to determine. At this location, water wells opened for drinking water as well as irrigation water is used in the agricultural field. Therefore in the study area which opened in water samples taken from water wells were examined. It was reformed in the field, water samples were taken from the predrilled water wells. Water wells in the same coordinates are determined by Garmin etrex 30 handheld Gps system. Chemical analysis of water samples taken in the laboratory was made. Some of the wells water’s pH, EC, and TDS features were acquired by Portable Hanna HI 98125 PH/EC/TDS/C⁰ meter device at the field.

At this study,   aquifer types and features are considered and water quality and water chemical properties determined in Diyarbakır City centre. PH, EC, TDS values of the water samples taken on site as well those water chemical analyses measured in the laboratory. Then they were modelled by using ARC INFO GIS programme and Spatial Analyse extension. At the end of this process, thematic map of Diyarbakır City centre’s PH, EC, TDS were produced.