ANALYSIS OF RIVER FLOW REGIME CHANGES RELATED TO WATER AVAILABILITY ON KAPUAS RIVER, INDONESIA

摘要

The rivers are major sources of fresh water, which is a basic need of the society.The availability of water is affected by watershed characteristics such as rainfall and land cover types. Along with population and economy growth, there has been a change in land use that leads to changes in land cover types, there by changing the river fl ow regime and affecting the availability of water in the river. So, it is necessary to analyze water fl ow regime changes in the river to determine water availability to plan for action in the future. Studies on these aspects were conducted in the Kapuas watershed with catchment area of about 100.284 km2, West Kalimantan, Indonesia. The study was conducted by analyzing the trend of annual rainfall and change of land cover during the last 3 decade, analyze land cover types and compare the availability of water in the Kapuas river from measurements results in 2002 and 2012.