Study of Climate Change Effect on Water Balance in Upper Citarum Watershed, The Krueng Cunda Watershed, and The Woske Watershed, Indonesia

EasyChair Preprint 6144

Abstract

The Changes in water availability are felt by the community as a result of climate change. In the territory of Indonesia and several other countries, the main source of water for raw water is surface water which is very dependent on the value of the rainfall. Changes in rainfall characteristics will directly impact water availability, especially water availability in rivers, reservoirs and other water reservoirs. The purpose of the analysis is to determine changes in the shift in the rainy season, changes in reliable discharge, and the effect of climate change on the water balance. From the calculation, there has been a shift in the rainy season and a significant decrease in the amount of rainfall during the last 10 years. In the Upper Citarum Watershed, there is a change in the maximum mainstay discharge from 8.6 m3/s to 7.98 m3/s, and the initial minimum flowrate of 1.04 m3/s to 0.4 m3/s. In the Krueng Cunda watershed, there is a change in the maximum mainstay discharge from 8.76 m3/s to 7.25 m3/s, and the original minimum flowrate of 2.65 m3/s to 2.25 m3/s. In the Woske watershed, there is a change in the maximum mainstay discharge from 4.36 m3/s to 4.22 m3/s, and the initial minimum flowrate of 1.01 m3/s to 0.89 m3/s. Climate change greatly affects the water balance in a watershed. From the calculation results, the water balance in the Upper Citarum Watershed in 2019 has a water deficit for three months, namely in July of 0.25 m3/s, August of 0.68 m3/s, and September of 0.93 m3/s. Meanwhile, in the Krueng Cunda watershed and the Woske watershed there was a decrease in the value of the water balance similar to that of the upstream Citarum watershed but still able to meet the water needs of the population.

Keyphrases: change, climate, water

@booklet{EasyChair:6144,
  author    = {Abdul Chalid and Aris Mulyadi},
  title     = {Study of Climate Change Effect on Water Balance in  Upper Citarum Watershed, The Krueng Cunda Watershed, and The Woske Watershed, Indonesia},
  howpublished = {EasyChair Preprint 6144},
  year      = {EasyChair, 2021}}