다목적 최적화 기법을 이용한 수위관측망 평가

This study has evaluated the stream gauge network which is considered the total hydrological information and the importance class ofstream gauge stations, and is applied to Namgang Dam basin. The total hydrological information and the importance class of streamgauge stations are two different physical parameters. We adopt the Euclidean distance method to consider them simultaneously. Anequation obtained by the Euclidean distance method is used as the objective function in multiobjective optimization method to determinethe optimal combination of the stream gauge stations for satisfying the both criteria: the maximum total amount of the hydrologicalinformation and the importance class of stream gauge stations. To evaluate the optimal stream gauge network, therepresentative unit hydrograph which is derived by real rainfall-runoff analysis is transferred into probability density function for theapplication of entropy theory concept. The importance class of stream gauge stations is determined by referring the result of MLIT(2010). As result of applying to Namgang Dam basin, The optimal stream gauge network obtained by the suggested method showsmore satisfied the importance of stream gauge station purpose than the optimal stream gauge network obtain by the entropy theoryonly. This result implies that the optimal steam gauge network by the suggested method can consider both the total hydrological informationand the importance class of stream gauge station. It is found that Namgang Dam basin needs at least 8 steam gauge stationsamong 12 steam gauge stations.