초록 열기/닫기 버튼
The alternativity and reliability of major stream flows, the basis of water management in Seomjin river basin are investigated. Flow data measured by Ministry of Land, Infrastructure and Transport and Ministry of Environment etc. during last 10 years were equalized with area ratio flow method etc. and mutually compared. And they were analyzed annual correlation with correlation coefficient and error characteristics with mean absolute error(MAE) and root mean squared error(RMSE). Equivalent flow estimation equations which consider dam operation and water management conditions were suggested to convert the flows with different location and measuring method. Comparison of equivalent conversion flows by ME and other institute showed similar variation except some missing data. Correlation analysis showed correlation coefficients more than 0.8 annually and 0.9 totally. So the flows have good alternativity with each other. MAE of the flows were ranged 0.32~18.73 ㎥/s annually, 1.63~9.65 ㎥/s totally and the RMSE were ranged 0.66~70.34 ㎥/s annually, 3.22~19.97 ㎥/s totally. RMSE was 25% larger than MAE for same flow data, but the proportional tendency of the error to the basin area of flow site was more clear at RMSE. The results can be useful to expand the water management data in Seomjin river basin.
키워드열기/닫기 버튼
Seomjin river basin, Flow alternativity, Area ratio method, Flow measuring error
