Assessment of the impact of Damage to the Bulok River Basin on Hydrological Characteristics

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Yanti F Riswulan Riswulan
Irwan Sukri Banuwa
Abdullah Aman Damai
Erdi Suroso

Abstract

Water resources are the most important thing for human life. Research and management of water resources are very important to create the sustainability of water resources. Watershed (DAS) is a water catchment area that has an important role in providing water resources for humans. This research was conducted in Bulok Sub-watershed by analyzing two watershed evaluation factors, namely: watershed damage identification factors and watershed water system conditions based on Minister of Forestry Regulation Number 61 of 2014 concerning Monitoring and Evaluation of Watershed. The results of this study are the values obtained if the percentage of land cover in the Bulok Sub-watershed has decreased by 7.97% or an area of 6,987.29 hectares from 2009 to 2018. In the period 2009 to 2018 the critical and very critical criticality class increased from Rp. 2.32% to 23.44%. The decrease in vegetated land area in Bulok Sub-watershed has an effect on the characteristics of the watershed in Bulok Sub-watershed, in the water management aspect, the KRA (Flow Regim Coefficient) increased from 226 to 423, this value is an indication of a very high gap in the maximum and minimum discharge values during that time period.

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