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Agus Wuryanta
Research Institute for Watershed Management Technology Center (BPPTP DAS Solo)
Earth & Planetary Sciences

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Water Shortage at Several Sub Watershed into Wonogiri DAM Ugro Hari Murtiono; Agus Wuryanta
Jurnal Geografi : Media Informasi Pengembangan dan Profesi Kegeografian Vol 16, No 2 (2019)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jg.v16i2.20830

Abstract

The study was conducted at several selected sub-watersheds (Temon, Wuryantoro, Alang, and Keduang Sub-watersheds) in Wonogiri District. These four sub-watersheds are main rivers whose outlets flow into Wonogiri Dam. The study calculated the water supply and water demand for various uses at four sub-watersheds. The Thornwaite and Mather method was used to estimate the water supply. The results indicated that: (1) The water supply of Temon Sub-watershed was 35,435,875 m3­­­­­ and the annual water demand was 51,053,247 m3­­­­­, therefore there was a deficit of 30,59 % per year; (2)  The water supply of Wuryantoro Sub-watershed was 17,788,417 m3­­­­­ and the water demand was 22,413,430 m3­­­­­ per year, therefore the deficit was 20.64% per year; (3) The water supply of Alang Sub-watershed  was 31,372,317 m3­­­­­ per year and the water demand was 69,566,500 m3­­­­­ per year, therefore the deficit was 54.90% per year; (4) The water supply of Keduang Sub-watershed was 438,527,889 m3­­­­­ and the water demand was 452,611,219 m3­­­­­ per year, thus, the deficit was 3.11%  per year; (5) those sub-watersheds need improvements especially effective water resources plans, water allocation and distribution based on the determined priority, e.g., retention basin, low evapotranspiration re-vegetation, well-managed infiltration, water resources protection, and water reservoir construction.
Co-Authors Ugro Hari Murtiono