Subjects: Geosciences >> Geology submitted time 2023-08-23 Cooperative journals: 《中国科学院院刊》
Abstract： In order to implement the spirit of General Secretary Xi Jinping’s important speech on strengthening the comprehensive control of desertification and promoting key ecological engineering projects such as the “Three-North Shelterbelt Program”, this study is designated to make concrete efforts to win the battle against desertification on the edge of Hexi Corridor–Taklimakan Desert. The study deeply explores the situation of wind-blown sand flux and prevention tasks in the area. Based on the characteristics of desertified land and wind-blown sand activities on the edge of Hexi Corridor–Taklimakan Desert, the goal is set to effectively prevent the spread of sand and control dust sources. The core focus is on wind prevention, sand resistance, and dust control. The strategic thinking has been formulated for the counterattack battle on the edge of Hexi Corridor–Taklimakan Desert. By systematically analyzing the source areas and paths of “wind, sand, and dust” and targeting the key zones of the desert edge and areas requiring prevention, the key areas and tasks are proposed for desertification control on the edge of the Hexi Corridor–Taklimakan Desert, so as to provide scientific and technological support for winning the battle against desertification on the edge of Hexi Corridor–Taklimakan Desert.
Subjects: Statistics >> Social Statistics submitted time 2023-08-12 Cooperative journals: 《中国科学院院刊》
Abstract： In order to implement the spirit of General Secretary Xi Jinping’s important speech on strengthening the comprehensive control of desertification and promoting key ecological engineering projects such as the “Three-North Shelterbelt Program”, this study is designated to make concrete efforts to win the battle against desertification on the edge of Hexi Corridor–Taklimakan Desert. The study deeply explores the situation of wind-blown sand flux and prevention tasks in the area. Based on the characteristics of desertified land and wind-blown sand activities on the edge of Hexi Corridor–Taklimakan Desert, the goal is set to effectively prevent the spread of sand and control dust sources. The core focus is on wind prevention, sand resistance, and dust control. The strategic thinking has been formulated for the counterattack battle on the edge of Hexi Corridor–Taklimakan Desert. By systematically analyzing the source areas and paths of “wind, sand, and dust” and targeting the key zones of the desert edge and areas requiring prevention, the key areas and tasks are proposed for desertification control on the edge of the Hexi Corridor–Taklimakan Desert, so as to provide scientific and technological support for winning the battle against desertification on the edge of Hexi Corridor–Taklimakan Desert.
Subjects: Environmental Sciences, Resource Sciences >> Basic Disciplines of Environmental Science and Technology submitted time 2018-11-08 Cooperative journals: 《干旱区研究》
Abstract：新月形沙丘是风蚀荒漠化过程中伴随的重要风积地貌类型，在以往的研究中主要侧重于沙丘体表面动力学过程，而关于沙丘在风蚀荒漠化过程中的作用鲜有报道。本文在台特玛湖的干涸湖盆区（曾经的塔里木河尾闾湖），采用测钎法，实地测定了新月形沙丘周围地表的蚀积变化，同时采用室内风洞模拟了典型新月形沙丘地表的气流分布模式，系统分析了新月形沙丘对地表蚀积影响的作用机理。结果表明：在新月形沙丘影响下，沙丘周围地表风蚀强度不均一，在沙丘迎风坡前区和沙丘左右翼，风蚀深度略大于不受沙丘影响区（CK），但单位面积平均净蚀积量接近平衡状态；在沙丘背风坡前区以风积为主，而在背风侧尾流区，地表以风蚀为主，且随着沙丘体积增加，单位面积平均净风蚀量也略有增大。在内陆干旱区干涸湖盆风蚀荒漠化过程中，新月形沙丘通过改变地表流场结构，使风沙流饱和度发生空间分异，从而影响了下伏地表蚀积的空间分布，尤其加剧了背风侧尾流区的风蚀，使新的风蚀面裸露，破坏沉积层结构，促进了河湖相沉积平原风蚀荒漠化的发展。
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