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Lanzhou University (兰州大学) 2021

Ecological Water Requirement of Natural Vegetation in Shule River Basin Based on Spatial Optimization of Biocapacity

魏乐民

Titre : Ecological Water Requirement of Natural Vegetation in Shule River Basin Based on Spatial Optimization of Biocapacity

Auteur : 魏乐民

Grade : Master 2021

Université : Lanzhou University (兰州大学)

Résumé partiel
Ecological overshoot has been a common problem in inland river basins in arid land.Shule River Basin,a typical arid inland river basin,is located in the northern sand prevention belt of China,is also the important node of"One Belt And One Road"In the Shule River Basin,climate is arid,water resources are scarce,and the ecological environment is very fragile.With the increase of population,human needs for Biocapacity are increasing day by day,and the problem of ecological overshoot is particularly prominent.The optimization of Biocapacity is the efficacious way to maintain the sustainable supply of Biocapacity and solve the problem of ecological overshoot.However,water resources in arid inland river basins are an important limiting factor for the optimization of Biocapacity,especially the natural vegetation,as the main provider of Biocapacity,has a strong dependence on ecological water requirement.Therefore,the rational allocation of ecological water requirement is the key to ensure the optimization of Biocapacity of natural vegetation.The ecological water requirement of natural vegetation under the spatial optimization pattern of Biocapacity of natural vegetation in inland river basins in arid land has not been thoroughly studied at home and abroad at present.Therefore,this paper aimed at this key scientific problem,took the Shule River Basin as an example,and based on meteorological data and remote sensing data with the support of remote sensing and GIS technology,based on the Penman-Monteith formula and the ecological footprint of vegetation net primary productivity(NPP-EF),this paper estimated the water consumption and Biocapacity of natural vegetation in the Shule River Basin from 2000to 2018,and analyzed their spatial and temporal patterns and their spatial correlation.Based on this,a Biocapacity optimization model based on cellular automata model was constructed,and three scenarios of Biocapacity optimization were set up and carried out in this basin.Then,the water consumption of vegetation was taken as the ecological water demand of vegetation,and the ecological water requirement of natural vegetation was quantitatively estimated under three scenarios,and the spatial allocation and regulation policy suggestions of the ecological water requirement of the basin were put forward,in order to provide reference for the regulation of ecological water resources in the basin.

Mots clés : Shule River Basin ;biocapacity optimization model ;vegetation water consumption ;vegetation ecological water requirement ;spatial and temporal pattern ;

Présentation (CNKI)

Page publiée le 12 mars 2022