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Inner Mongolia Agricultural University (2020)

Study on Construction of Protection System and the Benefits of Wind and Sand Control in Desert-oasis Ecotone

解云虎;

Titre : Study on Construction of Protection System and the Benefits of Wind and Sand Control in Desert-oasis Ecotone

Auteur : 解云虎;

Grade : Doctoral Dissertation 2020

Université : Inner Mongolia Agricultural University

Résumé partiel
Desert-oasis ecotone is a special ecological fragile zone between desert and oasis,where the transformation of two kinds of natural landscapes is the most intense and prominent.The southeast edge of the Tengger Desert is controlled by the westerly circulation all the year round.It is located on the edge of the East Asian monsoon.It is drought and little rain,high evaporation,has sufficient sunlight,has a long frost-free period,is windy and Sandy,and has been subjected to unreasonable human activities for many years,resulting in desertification of the land and degradation of the grassland in the area,the ecological imbalance and the bad natural environment not only restrict the development of local economy and society,but also threaten the ecological security and environmental quality of the East and central region.In view of the severe situation of desertification in the desert-oasis ecotone on the southeastern edge of the Tengger Desert,it is urgent to carry out desertification control work in the desert-oasis ecotone.In this study,the present situation and evolution trend of land desertification in Green Beach in the southeast edge of Tengger Desert were analyzed,and the location of sensitive area for wind erosion was determined,based on the analysis of the response of climatic factors to land desertification,a perfect protective system of oasis was constructed in the Gelintan desert-oasis ecotone,through field observation of the characteristics of wind-blown sand flow,surface erosion and deposition,and the law of sand-dust deposition,the benefit of wind and sand prevention of the protection system is evaluated,the main conclusions are as follows :(1)The types of sandy land in Green Beach are divided into heavy sandy land,moderate sandy land,light sandy land and unsandy land,the area is 15.23 km2,23.98 km2,26.69 km2,13.64 km2,respectively,they accounted for 23.11%,36.39%,40.50%and 17.15%of the total area respectively.

Mots clés : Oasis protective system; Desert-oasis ecotone; Wind and sand control; Desertification; Tengger Desert;

Présentation (CNKI)

Page publiée le 15 juin 2021, mise à jour le 25 novembre 2021