Land Use Model To Reduce Flood at Arau Padang Watershed

LUSI, UTAMA (2021) Land Use Model To Reduce Flood at Arau Padang Watershed. Land Use Model To Reduce Flood at Arau Padang Watershed, 9 (3). ISSN 2277-8616

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Abstract

Flooding is one of the many environmental problems that occur in some watersheds (DAS) in Indonesia. Based on Lusi Utama's research (2019), is the large level of debit in SUB-watersheds Arau-the city of Padang, which is calculated based on land use that causes flooding. For this reason, it is necessary to reduce the flooding that occurred in the Arau Watershed by managing the area and land use that is ideal. Some of the results of research on floods occur as a result of human behavior, namely by changing the function of infiltration land into developed land. There was a high increase in flooding in Padang City from 2008 - 2018. This shows the condition of the Watershed (DAS) is bad, causing floods and sedimentation. By using a map of the earth and analyzed with the Argis X, obtained extensive maps and land use. Thiessen and Gumbel methods for calculating planned rainfall is used. The amount of discharge due to land use is analyzed by Rational methods. Analysis of discharge that occur due to rainfall will be compared with discharge obtained from land use. If the discharge due to rainfall is greater than the discharge due to land use, it is necessary to adjust the area and type of land use that can reduce flooding. The area and type of land use arrangement called the land use model is to reduce flood, the largest green land required is 50.21% in the Lubuk Paraku, and the smallest is 7.32% in the Sekayang. Index Terms—Model, Land use, Discharge, Watershed, Rainfall.

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