Lumped conceptual model; Rainfall-runoff model; TANK Model; Tonle Sap Lake
Abstract :
[en] This paper presents an application of TANK Model to a sub-catchment of the Tonle Sap Lake of Cambodia. The TANK Model was developed in Japan and was reported as being successfully applied to many river basins in Africa, Asia, Europe and the United States. The objective of this study is to investigate the performance of the TANK Model in tropical monsoon climate condition. The studied area is a sub-catchment of the Tonle Sap Lake. Two automatic hydrological stations and four automatic telemetry meteorological stations were installed in the sub-catchment. Rating curves at the two hydrological stations was established. The performances of the rating curves and the TANK model were assessed by four standard statistical evaluations. The model was calibrated by discharge derived from the rating curves. The runoff pattern from the TANK Model correlated closely with rainfall pattern. The model could estimate runoff for the wet season, except for some peak flows generated from delayed runoffs. However, the model tended to overestimate dry season flow and react faster to rainfall events in the dry season.
