IJSTR >> Volume 9 - Issue 4, April 2020 Edition

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AUTHOR(S)

Bambang Milianto, Anis Saggaff, Febrian Hadinata

KEYWORDS

Watershed, dependable flow, HEC-HMS, hydrology, water availability, Q80, TRMM.

ABSTRACT

Water resources are needed currently very much, especially in the area of Kota Pagar Alam for the purposes of rice fields which are planned to be served by Lematang Weir. The purpose of this study is to determine water availability to calculate dependable flow in Lematang Weir by using the Hydrology Engineering Center-Hydrologic Modeling System (HEC-HMS) model. The Lematang Weir watershed is influenced by land cover and average monthly rainfall which ranges from 7.13 mm in 2018, based on rainfall data which is taken from satellite rainfall data (TRMM). Based on mapping analysis and Geographical Information System (GIS) software, the Lematang Weir watershed is obtained covers an area is 59.889 km2. By using HEC-HMS software, the simulation results to show that the Q80 dependable flow in the Lematang Weir watershed is 1 m3/s and Q90 is 0.70 m3/s.

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