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http://dx.doi.org/10.3741/JKWRA.2021.54.2.93

Parameter optimization of agricultural reservoir long-term runoff model based on historical data  

Hong, Junhyuk (Department of Civil System Engineering, Ajou University)
Choi, Youngje (Department of Civil System Engineering, Ajou University)
Yi, Jaeeung (Department of Civil System Engineering, Ajou University)
Publication Information
Journal of Korea Water Resources Association / v.54, no.2, 2021 , pp. 93-104 More about this Journal
Abstract
Due to climate change the sustainable water resources management of agricultural reservoirs, the largest number of reservoirs in Korea, has become important. However, the DIROM, rainfall-runoff model for calculating agricultural reservoir inflow, has used regression equation developed in the 1980s. This study has optimized the parameters of the DIROM using the genetic algorithm (GA) based on historical inflow data for some agricultural reservoirs that recently begun to observe inflow data. The result showed that the error between the historical inflow and simulated inflow using the optimal parameters was decreased by about 80% compared with the annual inflow with the existing parameters. The correlation coefficient and root mean square error with the historical inflow increased to 0.64 and decreased to 28.2 × 103 ㎥, respectively. As a result, if the DIROM uses the optimal parameters based on the historical inflow of agricultural reservoirs, it will be possible to calculate the long-term reservoir inflow with high accuracy. This study will contribute to future research using the historical inflow of agricultural reservoirs and improvement of the rainfall-runoff model parameters. Furthermore, the reliable long-term inflow data will support for sustainable reservoir management and agricultural water supply.
Keywords
Agricultural reservoir; DIROM; Historical data; Genetic algorithm; Parameter optimization;
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Times Cited By KSCI : 4  (Citation Analysis)
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