Rainfall Analysis for Estimation of Peak Discharge and Soil Erosion on the Catchment Area of Musi Hydro-Power Plant, Bengkulu Indonesia

Khairul, Amri and Halim, A. and Ngudiantoro, Ngudiantoro and Faiz, Barchia Rainfall Analysis for Estimation of Peak Discharge and Soil Erosion on the Catchment Area of Musi Hydro-Power Plant, Bengkulu Indonesia. International Proceedings of Chemical, Biological and Environmental Engineering, 63. ISSN 2010-4618

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Abstract

This research aims to determine peak of discharge and soil erosion occurring in catchment area of Musi Hydro-Power Plant, Bengkulu, Indonesia based on analyzing rainfall characteristics. The research was conducted from October to December, 2012 in the catchment area of 60.357,21 Ha. The area lies on 102°22'18.98"-102°38'38.93" Lat., and on 3°16'28.873" -3°33'57.441" Long. Melchior method of rainfall analysis was applied for analyzing hydrological characteristics of peak discharge (Qp) with the specific time return. Potential soil erosion occurring in PLTA Musi Catchment Area was using USLE method determining by indices of rain erosivity, soil erodibility, length and slope, crop management, and soil conservation practices. Sediment Delivery Ratio (SDR), analyzing method of sedimentary ratio, is calculated to estimate the total amount of sediment based on calculation of total erosion occurring in the Catchment Area. Result of the research revealed that the peak of discharge for the catchment area of Musi Hydro-Power Plant, Bengkulu Province was 204,131 m3/second, and the time of concentration (Tc) was of 12,565 hours in the watershed area of 60.357,21 Ha for over 2 years at all the time. In addition, the total amount of erosion that occurred in the area of Musi Hydro-Power Plant, Bengkulu Province reached 1.737.884,27 tons/year which is twice over the tolerable soil erosion that equal to 811.804,475 tons/year. The amount of sediment released to the Musi river within the catchment, further, was of 137.292,857 tons/year is double over the tolerable value of sediment that equal to 64.132,55 tons/year, unfortunately.

Item Type: Article
Subjects: S Agriculture > S Agriculture (General)
Divisions: Faculty of Agriculture > Department of Soil Science
Depositing User: Miss Goklasni Manullang
Date Deposited: 23 Dec 2021 05:22
Last Modified: 23 Dec 2021 05:22
URI: http://repository.unib.ac.id/id/eprint/23646

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