Impact Assessment of Agricultural Reservoir and Landuse Changes on Water Circulation in Watershed

Seokhyeon Kim; Jung-Hun Song; Soonho Hwang; Moon Seong Kang

doi:10.5389/KSAE.2021.63.2.001

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2021 Vol.63, Issue 2 Next Page

Impact Assessment of Agricultural Reservoir and Landuse Changes on Water Circulation in Watershed 농업용 저수지와 토지이용변화가 유역 물순환에 미치는 영향 평가

2021. pp. 1-10

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Abstract

Agricultural reservoirs have a great influence on the water circulation in the watershed. It is necessary to evaluate the impact on water circulation by the agricultural reservoir. Therefore, in this study, we simulated the agricultural watershed through linkage of Hydrological Simulation Program Fortran (HSPF) and Module-based hydrologic Analysis for Agricultural watershed (MASA) and evaluated the contribution of the agricultural reservoir to water circulation by watershed water circulation index. As a result of simulating the Idong reservoir watershed through the HSPF-MASA linkage model, the model performance during the validation period was R² 0.74 upstream, 0.78 downstream, and 0.76 reservoir water level, respectively. To evaluate the contribution of agricultural reservoirs, three scenarios (baseline, present state, and present state without reservoir) were simulated, and the water balance differences for each scenario were analyzed. In the evaluation through the agricultural water circulation rate in the watershed, it was found that the water circulation rate increased by 1.1%, and the direct flow rate decreased by 13.6 mm due to the agricultural reservoir. In the evaluation through the Budyko curve, the evaporation index increased by 0.01. Agricultural reservoirs reduce direct runoff and increase evapotranspiration, which has a positive effect on the water circulation.

Keywords

Water circulation

agricultural reservoir

landuse change

HSPF-MASA linkage model

agricultural water circulation rate

Budyko curve

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Information

Publisher :The Korean Society of Agricultural Engineers
Publisher(Ko) :한국농공학회
Journal Title :Journal of Korean Society of Agricultural Engineers
Journal Title(Ko) :한국농공학회논문집
Volume : 63
No :2
Pages :1-10
Received Date : 2020-10-20
Revised Date : 2021-01-03
Accepted Date : 2021-01-03
DOI :https://doi.org/10.5389/KSAE.2021.63.2.001

Journal of Korean Society of Agricultural Engineers ISSN:1738-3692(Print) 2093-7709(Online) 한국농공학회논문집

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