Land surface roughness impacted by typical vegetation restoration projects on aeolian sandy lands in the Yarlung Zangbo River valley,southern Tibetan plateau
作者机构：Key Laboratory of Mountain Hazards and Earth Surface ProcessInstitute of Mountain Hazards and EnvironmentChinese Academy of SciencesChengdu610041China College of Water Conservancy and Hydropower EngineeringSichuan Agricultural UniversityYa'an625014China
出 版 物：《International Soil and Water Conservation Research》 (国际水土保持研究（英文）)
年 卷 期：2022年第10卷第1期
页 面：109-118页
核心收录：
学科分类：082802[工学-农业水土工程] 090707[农学-水土保持与荒漠化防治] 0907[农学-林学] 08[工学] 0828[工学-农业工程] 09[农学] 0815[工学-水利工程]
基 金：This work was supported by the Second Tibetan Plateau Scientific Expedition and Research Program(2019QZKK0404) the Strategic Priority Research Program of the Chinese Academy of Sciences(XDA20020401) the“Light of West China”Program of the Chinese Academy of Sciences(E0R2180)
主 题：Aeolian desertification Surface microtopographic variation Near soil surface characteristics Plant communities Yarlung Zangbo River valley
摘 要：Aeolian sandy lands are widespread and desertification is recognized as one of the main environmental issues in the Yarlung Zangbo River valley,southern Tibetan *** surface microtopographic var-iations induced by the near soil surface characteristics of plant communities are important compositions of land surface roughness,which likely influence wind *** study was conducted to quantify the effects of typical vegetation restoration on land surface roughness on the aeolian sandy lands,and to identify the main influencing factors of land surface roughness in the Yarlung Zangbo River *** bare sandy lands(as controls)and eight vegetated sandy lands with different restoration communities and ages were selected,and land surface roughness(LSR),as represented by surface microtopographic variations in this study,was measured by photogrammetric *** results showed that LSR significantly increased by 7.9-16.8 times after vegetation restoration on the aeolian sandy lands,and varied among different restoration communities and *** mostly restored communities of Sophora moorcroftiana and Populus *** greater LSR as compared to Artemisia wellbyi and Hedysarum *** succession from 6 to over 30 years,LSR gradually increased in the Sophora moorcroftiana restored sandy lands,but decreased in the Populus L restored sandy *** variations of LSR were mainly attributed to the differences in near soil surface characteristics of vegetation(plant stem diameter and coverage,and plant residue density)and biological soil crusts(coverage and thickness).Mixed plantation of Populus L and Sophora moorcroftiana was considered as the best restoration communities because of their effectiveness in increasing land surface roughness on the aeolian sandy lands in the Yarlung Zangbo River *** results would facilitate the understanding of the benefits of vegetation restoration in controlling wind erosion on the aeolian sandy lands.
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