Title: Impact of climate change on water sector in Gumbasa Watershed, Central Sulawesi, Indonesia

Authors: I. Wayan Sutapa; Saiful Darman; Djayani Nurdin; Fathurrahman

Addresses: Department of Civil Engineering, Faculty of Engineering, University of Tadulako, Palu, Indonesia ' Department of Agriculture, Faculty of Agriculture, University of Tadulako, Palu, Indonesia ' Department Economy, Faculty of Economy, University of Tadulako, Palu, Indonesia ' Department of Agriculture, Faculty of Agriculture, University of Tadulako, Palu, Indonesia

Abstract: Global climate change resulting in increased or decreased rainfall volume, rising temperatures, may also be associated with changes in season patterns, wind patterns, air humidity, and solar irradiance. This study aims to determine the potential hazards arising in the water sector due to climate change. This research was conducted in Gumbasa Watershed, Central Sulawesi, Indonesia. Primary data used in this research are characteristic of land, while secondary data include rain data, climatology data and earth map. The data of rain used by the nearest station are Bora Station, Kulawi, Palolo, Bangga Bawah, and Wuasa, whereas climatology data is used at Bora Station. Some of the methods used to complete this study are: 1) regional rainfall; 2) evapotranspiration; 3) water availability; 4) CDF statistical analysis; 5) climate change projections; 6) potential hazards. Based on the analysis performed, it can be concluded: 1) there is no danger of decreasing water availability for all periods (1993-2052); 2) there is a high flood hazard in the period 2013-2022, while the other periods do not occur due to flood hazard; 3) low drought hazards occur in the period 2003-2012, while for other periods there is no drought hazard.

Keywords: climate change; Gumbasa Watershed; MockWyn-UB model; water sector; hazards.

DOI: 10.1504/IJHST.2021.113110

International Journal of Hydrology Science and Technology, 2021 Vol.11 No.2, pp.211 - 231

Received: 04 Sep 2018
Accepted: 10 Jul 2019
Published online: 19 Feb 2021 *

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