GROUNDWATER POTENTIAL AND QUALITY ASSESSMENT IN A SLUM AREA, BIMA CITY, WEST NUSA TENGGARA, INDONESIA

• Main Author: Vinca Alvando, Pascalia
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/65119
• Institution: Institut Teknologi Bandung

The meteorological condition of Bima which is prone to drought, the suboptimal service of clean water from bulk water, and the projected population growth encourage the integration of conjunctive water use. Therefore, a study regarding the groundwater potential zone and groundwater quality, especially in a slum area, will be conducted. The method used to determine the groundwater potential zone is AHP (Analytical Hierarchy Process) and is integrated with the GIS (Geographic Information System). hydrogeochemistry measurements were carried out to determine the quality of each groundwater parameter and analyzed using PCA (Principal Component Analysis) in R. The result shows that the groundwater potential zone in the Rontu watershed is mostly classified as “High” with a coverage percentage of 48%, followed by the “Medium” zone which covers about 31.12% of the total study area. And the “Very High” zone at 17.22%, and the “Low” to “Very Low” zone covers about 3.62% of the total research area. The variance distribution of groundwater parameter quality in dimension 1 (Dim1 or PC1) highly correlates with the type of contamination caused by brackish water. Meanwhile, the parameters distributed in the Dim2 or PC2 are usually associated with pollution originating from anthropogenic. In the third quadrant, there is no distribution of variance, where samples MA-01, MA-04, and MA-05 are plotted, which distinguished the spring quality with the wells located in the urban area. All samples tested for the hydrogeochemistry are assessed according to the drinking quality and sanitation standard by PERMENKES NO. 492 of 2010 and PERMENKES NO. 32 of 2017, respectively. Two samples, namely SB-06 and SG-09, have concentrations of TDS, Sulfate, and Sodium which exceed the quality standard, and thus are not potable. For sanitation, sample SB-06 has value parameters of TDS, taste, and odor exceeding the permissible limit.