Effects of an oasis protective system on aeolian sediment deposition:a case study from Gelintan oasis,southeastern edge of the Tengger Desert,China

作     者：DING Jing XIE Yun-hu LI Xiao-jia JIANG Hong-tao WANG Ji LIU Xiao-xi WU Xue-qin WANG Yu-hao HAI Chun-xing DING Jing;XIE Yun-hu;LI Xiao-jia;JIANG Hong-tao;WANG Ji;LIU Xiao-xi;WU Xue-qin;WANG Yu-hao;HAI Chun-xing

作者机构：College of Geographical ScienceInner Mongolia Normal UniversityHohhot 010022China Inner Mongolia Repair Engineering Laboratory of Wetland Eco-Environment SystemHohhot 010018China College of Desert Control Science and EngineeringInner Mongolia Agricultural UniversityHohhot 010022China 

出 版 物：《Journal of Mountain Science》 (山地科学学报（英文）)

年 卷 期：2020年第17卷第8期

页      面：2023-2034页

核心收录：

学科分类：07[理学] 09[农学] 0903[农学-农业资源与环境] 0713[理学-生态学] 

基　　金：sponsored as a sub-project of the National Key Research and Development Program of China-Desertification Land Management and Sand Industry Technology Research and Development and Demonstration in Inner Mongolia Desertification Area,named Key Techniques and Demonstration of Sand Damage Control in Oasis and Saline-alkali Lake(2016YFC0501003) a sub-project of the National Key Research and Development Program of Study on Restoration and Protection of Typical Fragile Ecology,named Study and Demonstration of Sand-fixing and Wind-breaking Techniques of Cyperus Esculentus L.in North Wind-blown Sand Region(2019YFC0507600) 

主　　题：Aeolian sediment deposition Desert oasis ecotone Grain size characteristics Oasis protective system Tengger Desert 

摘      要：Desert-oasis ecotones are boundary areas between oases and desert *** efforts to control sediment and stabilize these boundaries depend on understanding sedimentary processes,especially aeolian transport and *** studies on aeolian sediment deposition have focused primarily on a single land surface type or a single engineering *** studies have considered deposition in a multi-layer oasis protective system.A complete oasis protective system consists of an outer bare sand area,a sand barrier zone,a shrub and herbaceous plant zone,and a farmland shelter *** study used sedimentary analysis to quantify grain-size characteristics in samples from the four land surfaces under different types of weather conditions in the Gelintan oasis of the Tengger Desert,the fourth largest desert in *** results showed that aeolian sediment deposition decreased from the outer bare sand area through the oasis protective system and into the *** four land surface types showed significant differences in deposition volume(P0.05).Deposited sediment showed gradual decrease in dominant grain-size from sand to silt,but sediment deposited during dust weather contained a larger coarse-grained *** the outer desert to the inner oasis,transport mechanisms shifted from saltation(sand)to suspension(silt and smaller)in non-dust *** dust weather,deposition primarily occurs from near-surface aeolian sand transport with *** sorting decreased from exterior to interior zones of the protective system while skewness and kurtosis showed no significant change(P0.05).These results can help inform strategies for stabilizing and protecting desert-oasis ecotones in this region and other localities.