Analysis on the Evolution of Water Resources Situation in Qiandao Lake Basin from 1960 to 2020
Aiming at the evolution of water resources in Qiandao Lake Basin under the condition of climate change,a WEP-L distributed hydrological model was established to simulate the water cycle process in the basin during 1960-2020.The Mann-Kendall non-parametric test method and Hurst index method were used to analyze the inter-annual variation and annual distribution characteristics of the total water resources in the basin.The temporal and spatial distribution and evolution trend of water resources in Qiandao Lake Basin were evaluated.The results indicate that The WEP-L model performs well in simulation the Qiandao Lake basin,and the Nash coefficient rate is above 0.83 in the calibration period and above 0.85 in the verification period;The water yield coefficient of the whole basin ranges from 0.436 to 0.630.The annual average total water resource is 122.5X 108m3,equivalent to 1 176.4 mm of water depth.The annual distribution process shows a unimodal structure,and the water depth of each sub-basin ranges from 742 mm to 1 266 mm,and the spatial distribution is higher in the west and lower in the east;The annual water resources series in the basin show an in-significant upward trend,and the Hurst index is 0.86,indicating a continuous upward trend.From the perspective of monthly water resources,January and February increased significantly,the other months were not significant changes.
WEP-L modelevolution of water resourcesQiandao Lake basinclimate change
万方数据
维普
