ANALYSIS OF WATER RESOURCES CARRYING CAPACITY WITH SPATIAL APPROACH (CASE STUDY : CIAMIS REGENCY, WEST JAVA)

• Main Author: Ramadhani, Radiyah
• Format: Theses
• Language: Indonesia
• Subjects: Teknik saniter dan perkotaan; teknik perlindungan lingkungan
• Online Access: https://digilib.itb.ac.id/gdl/view/45923
• Institution: Institut Teknologi Bandung

Water resources are a basic need for all living things. But now the availability of water resources is decreasing. Population growth, socio-economic conditions, and changes in land cover are identified as the main causes of pressure on the water. This situation is expected to increase in the future due to climate change. Water Resources Carrying Capacity (WRCC) as a water availability threshold status needs to be identified. The purpose of this study is to analyze and simulate the effect of the Water Resources Support policy in each demand of water demand by integrating socio-economic conditions and the availability of water resources until 2040. The analysis was carried out in the Citanduy watershed using the integration of the hydro-economic model SWAT and DSS -WEAP (Soil Water Assessment Tool and Water Evaluation and Planning) supported by ArcGIS software. The availability of water in the Citanduy watershed, as the main source of raw water in the Ciamis Regency is estimated using the SWAT hydrological model with projected changes in land use and climate RCP 4.5 CSIRO model M.k 3.6. The results of the projected availability of water in the Citanduy watershed indicate that water discharge will decrease by an average of 37%. Then, the results of the SWAT model are used as a hydrological input for the WEAP system model. The results of the SWAT model are used as a hydrological input for the WEAP system model. Simulation models produce a value deficit of the WRCC Citanduy watershed increasing with an average value of 1.48 m3 / second in 2017 which only occurred in August to 12.93 m3 / second in 2040 which occurred in July to November. With the application of improved irrigation water efficiency, fisheries efficiency, Demand Save Management and domestic water mix in the upstream river area and the application of improved irrigation water efficiency and fisheries efficiency in the downstream river area accompanied by dam operations resulted in an increase in the carrying capacity of the Citanduy Watershed Watershed by 90.05% of the scenario reference, where 9.95% water insecurity occurs in irrigation areas. Related to the results of simulations and priorities for water services, the Government of Ciamis Regency together with other relevant citiesneeds to review plans for expanding irrigation areas or by changing irrigation systems or cropping patterns.