Study on the Influence of Changing Environment on the Eco-hydrological Regime of Downstream NamLik1-2 Reservoir
In order to investigate the change of eco-hydrological regime in the lower reaches of Namlik River,a tributary of Me-kong River,following the NamLikl-2 reservoir,this paper selected the daily runoff data of Hinheup hydrological station from 1980 to 2018,ERA5 reanalysis meteorological data and geographic information data,and applied IHA_RVA method to evaluate the hydrological regime change after the operation of NamLikl-2 reservoir.Additionally,the SWAT model was used to analyze the contributions to the annual runoff distribution in the lower reaches of the reservoir.The results show that,(1)After the operation of NamLikl-2 reservoir,the hydrological regime of the downstream has changed significantly with a high variation of 79％,and the monthly runoff with a significant change of 70.4％.(2)It is indicated that the operation of the reservoir contributes to 142％of the runoff reduction during the flood season and 71％of the increase during the dry season,however,the corresponding contri-butions of climate change are-42％and 29％respectively,which indicates that the reservoir operation could be the main factor to the runoff regime.
eco-hydrological regimeIHA_RVAhydrological changeSWAT model
万方数据
维普
