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Chang’an University (长安大学) 2021

Study on Hydrological Process Simulation and Prediction and Eco-environmental Water Demand in Jinghe River Basin

张珈玮

Titre : Study on Hydrological Process Simulation and Prediction and Eco-environmental Water Demand in Jinghe River Basin

Auteur : 张珈玮

Grade : Master 2021

Université : Chang’an University (长安大学)

Résumé partiel
The Jinghe River Basin is a typical watershed in the arid-semi-arid region of China,where water resources are relatively scarce and soil erosion is serious.Therefore,in the context of ecological restoration and vegetation reconstruction,analyzing the temporal and spatial variation characteristics in hydrological processes,exploring its response to changes in climate and land use,measuring the water demand of the ecological environment in the basin,is of great theoretical significance to understand and quantify the impact of climate change and human activities on the hydrological cycle,to recognize the surface energy balance and water exchange process of pavement.At the same time,has very important practical significance for the formulation of ecological protection,resource development and economic development planning.Based on the Jinghe River Basin as the research area,the DEM,land use,soil and meteorological data were input into the SWAT hydrological model,and the model was calibrated and verified according to the measured data,therefore,a hydrological model suitable for basin characteristics was constructed.The monthly runoff and sediment transport in the basin from 2006 to 2012 were simulated,and their temporal and spatial changes were analyzed.The CA-Markov model was used to predict the spatial distribution pattern of land use types of the basin in 2025,and to explore the impact of land use changes on the runoff and sediment transport in the basin.Based on the runoff and sediment transport data,the factors that affect the water demand of the ecological environment of the basin were analyzed,the water demand of the ecological environment was calculated,the time distribution characteristics are analysed,the relationship between water supply and demand was explored,and the countermeasures for the resonable utilization of water resources in the basin were provided

Mots clés : SWAT model ;CA-Markov model ;Hydrological process ;Ecological environmental water demand ;Jinghe River Basin ;

Présentation (CNKI)

Page publiée le 18 mars 2022