Abstract

Climate change in Indonesia is marked by changes in temperature, rainfall patterns, sea level and climate variability. The climate condition of the Sausu watershed is a natural process that occurs in a rainfall patterns, magnitude and changes in air temperature. This study was conducted to identify the dangers of climate change to the water sector in the Sausu watershed. The analytical method used is Modified Penman evapotranspiration, water balance analysis model F.J. Mock, Makesens, Cumulative Distribution Frequency (CDF) statistical analysis and hazard weighting. This study uses secondary data, namely rainfall sourced from the Sausu rain station in 2002-2021 and climate data (climatology) sourced from BMKG in 2002-2021. Results from this study is that climate change occurs in the Sausu watershed which is characterized by a positive Z value (an increasing trend) and negative (a decreasing trend). A positive Z value (increasing trend) occurs in June, and a negative Z value (declining trend) occurs in December. The danger of decreasing water availability (PKA) occurs in the period 2052-2061 with a low level of danger. Flood hazard occurs in the period 2052-2061 with a high level of danger. Drought hazards occur in the period 2042-2051 and the period 2052-2061 with a low level of danger.

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