HYDROGEOCHEMISTRY AND HYDROSTRATIGRAPHY ANALYSIS IN TAMAN HUTAN RAYA REGION AND SURROUNDING BANDUNG, WEST JAVA

• Main Author: NIKLA IKLIMA (NIM : 22714304), NELI
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/29600
• Institution: Institut Teknologi Bandung

Bandung is one of the big city with rapid increase in the number of people. This may have implication to the increase of water demand which depends on groundwater and surface water. Other impact is the changing of land use as impact of the development of residential and public facilities which could decreasing the amount of water infiltration. The aim of this research is to know the impact of the changing in land use to water balance in research area. Hydrogeochemical data from water samples are used to determine groundwater flow system and the calculation of water balance is using F.J.Mock Method. Groundwater flow system in research area is known as local flow based on hydrogeochemistry analysis which characterized by low TDS value, bicarbonate dominated water type, and young-aged water (7 – 11 years) with hydraulic conductivity value of 7.76 x 10-8 - 2.64 x 10-7 m / s, as well as including the akuitar layer of volcanic breccias. There are anomalies of the value of TDS and isotope made possible by the presence of subsurface water-resistant coating, which will be evidenced by the results of geoelectric data analysis. Water balance calculation from 2010 – 2013 shows the increased of run off which have implication to the decreased of groundwater storage. The changing of land use in research area from 2010 to 2013 caused the decrease of recharge area and increase of run off and reach 25,78% between 2010 – 2013.