Assessing the Impact of Land Cover Change and Climate Change On Water Availability in Brantas River Basin, East Java, Indonesia Rohandi Prastiawan, ST- Dr. Christopher Ndehedehe (Griffith University)- DR. Roland A. Barkey (Hasanuddin University)
1. Universitas Hassanuddin
2. Griffith University
The cumulative emissions of CO2 in the atmosphere have caused impacts on hydrologic variability. It decreases the precipitation rates and increases surface temperature. On the other hand, unprecedented rates of land cover change have increased stream-flow and evaporation in the watershed. The effect of both climate change and land-use change has become a significant issue in the Brantas Watershed, Indonesia. In this study, SWAT analysis will be performed to observe the correlation between climate change and the impacts of land cover change to the watershed and projected water availability in the future will be measured. The watershed has been classified into five major land cover classifications- forest, water, agriculture, settlement and open land from three different satellite images, 1998, 2008 and 2018. Temporarily, the land cover map has shown major change in forest area, which has decreased 30 % and Open land area has decreased 6%, while agriculture and settlement increased 23 % and 20 % respectively The aim of this study is to contribute to the disaster prevention and mitigation plan for the future, which can be adopted by policy makers, planners and other associated development workers.
Keywords: Brantas Watershed- Climate change- Land Cover Change- SWAT- Water Availability