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Zhejiang University (2015)

Spatio-temporal Changes of Ejina Oasis Landscape-services after the Implementation of Surface Water Allocation Policy

宋章建

Titre : Spatio-temporal Changes of Ejina Oasis Landscape-services after the Implementation of Surface Water Allocation Policy

Auteur : 宋章建

Grade : Master’s Theses 2015

Université : Zhejiang University

Résumé
Ejina Oasis is located in the lower reaches of Heihe River Basin in the arid inland regions, the northwestern of China. It is a typical representative of oasis in the arid area, and also a crucial defensing ecological line in the northwestern of China. Since the 1960s, as the overusing of water in the middle reaches of Heihe River Basin, the amount of water falling to the lower reaches decreased drastically which lead to a series of ecological and environmental problems. In order to improve the ecological environment, the project of water allocation was launched in 2001.Taking Ejina Oasis landscape as the study object, and using the remote sensing images of 2001 and 2014 as data sources, this paper interpreted remote sensing images in use of remote sensing processing software, ENVI 4.7, to obtain information of landscape types. Based on the landscape type maps this paper analyzed the landscape changes of Ejina Oasis with landscape dynamic degree and the transfer matrix of landscape area ; then carbon stock services, sand-fixing services and habitat services were evaluated and mapped with InVEST model and quantitative indicators,and then the spatio-temporal changes of landscape services from 2001 to 2014, hoping to expand the view of the landscape restoration of Ejina Oasis and provide scientific basis for the rational use of resources of the arid area.

Mots clés : landscape changes ;landscape services ;landscape services supply hotspot ;spatio-temporal changes ;surface water allocation ;Ejina Oasis ;

Présentation (CNKI)

Page publiée le 16 avril 2022