Analysis of Water Availability in Tuban Regency Watershed Area

摘要

The impacts of climate change can affect the water availability of watershed in Tuban Regency, especially those that flow into the sea as much as 17 watersheds. The purpose of this study is to analyze the variables of temperature and rainfall associated with climate change on water availability in 2050. Projection methods for the climate change using Magicc/SCengen, image processing to obtain vegetation index and land cover type. Groundwater calculation using direct runoff and base flow analysis. The results show the projections in 2050 are trend raising in temperature and trend descend in rainfall, and the water availability is still sufficient assuming a decrease in forest area due to development.