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aeolian desertification and its control in Northern China

International Soil and Water Conservation Research 2014年第4期2卷 34-41页

作者： Wang Tao Key Laboratory of Desert and desertification Chinese Academy of SciencesCold and Arid Regions Environmental and Engineering InstituteCASLanzhou730000China

aeolian desertification is a kind of land degradation through wind erosion resulted from the excessive human activities in arid,semiarid and part of sub-humid regions in Northern *** compare the results of remote sensing data in the late 1950s,1975,1987,2000 and 2010,we can summarize that the expansion of aeolian desertified land in Northern China has been accelerated for 5 decades,as its annual expanded rate was 1,560 km^(2) during the late 1950s and 1975,2,100 km^(2) between 1975 and 1988,3,600 km^(2) from 1988 to 2000,and-1,375 km^(2) from 2000 to *** desertified land kept expanding before 2000 and began to get rehabilitated since *** impact of human activity on the aeolian desertification process is much more active than that from natural process which mainly incarnates on land use change(from rangeland to farmland)and increased land use intensity(over-cultivation,over-grassing,and over-fuelwood collection).The natural vegetation cover destroyed by the human activities has accelerated the development of aeolian *** has made great progresses in understanding and combating aeolian desertification through decades of effort and there were many projects carried out for the prevention and control *** National Project of Grain for Green Program is the most important one with 1060 counties of 22 provinces *** objective is to withdraw 3.67 million ha of dry land farming and degraded steppe,and 5.13 million ha of aeolian desertified land suited to reforestation and re-vegetation will be *** are about 8 million ha of lands suffering from aeolian desertification will be brought under control in the next ten years and 26.67 million ha of windbreaks will be *** total investment from the central government is estimated to be 75 billion RMB(11 billion USD).

关键词： aeolian desertification Development process Combating Northern China

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Mapping the dynamic degree of aeolian desertification in the Shiyang River Basin from 1975 to 2010

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Research in Cold and Arid Regions 2020年第3期12卷 144-153页

作者： Jie Liao Tao Wang ShaoXiu Ma Jian Guo Key Laboratory of Desert and desertification Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhouGansu 730000China Drylands Salinization Research Station Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhouGansu 730000China Lanzhou Branch Chinese Academy of SciencesLanzhouGansu 730000China

The Shiyang River Basin is an area of China that is severly affected by aeolian ***,we established an aeolian desertified land classification system for visual interpretation,which classified the aeolian Desertified Land(ADL)into Slight(SL),Moderate(M),Severe(S)and Extremely Severe(ES)according to the *** of Landsat series(acquired in 1975,1990,2000 and 2010)were employed to monitor the status,trend and spatial pattern of aeolian desertification,especially to map the overall spatial pattern of ADL dynamics by proposing a new Dynamic Index(DI)in the Shiyang River Basin from 1975 to *** results show a generally decreasing trend from 1975 to ***,the ES ADL kept increasing throughout the whole study ***,the area of ADLs with different severity increased with increasing severity,this S and ES ADLs dominated characteristics of aeolian desertification was contrary to those sandy lands in eastern China where was dominated by SL and M *** the three sub-periods of 1975−1990,1990−2000 and 2000−2010,the first two were the restoration stage,while the last one was the expansion stage of aeolian ***,all these new ADLs occurred in Minqin County during 2000−2010,indicating a detrimental increase of aeolian desertification in Minqin,and the concentration of ADLs toward the lower reaches of the Shiyang River *** DI works well to identify areas with desertification changes no matter the ***,DI results disclosed a stable status of aeolian desertification,and the DI decreased with increasing ADL *** results indicate that it will be difficult to control the expansion of aeolian desertification in Minqin County over an extended period of ***,we suggest effective and long-lasting aeolian desertification control programs in the Shiyang River Basin,especially in Minqin,and SL and MADLs should have priority in facilitating a quick reversal of aeolian desertification.

关键词： aeolian desertification dynamic degree Shiyang River Basin Minqin

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Human Causes of aeolian desertification in Northern China

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Research in Cold and Arid Regions 2008年第1期000卷 1-13页

作者： Tao Wang Xian Xue Yiqi Luo Xuhui Zhou Bao Yang Wanqun Ta Wei Wu Lihua Zhou Qingwei Sun XunmingWang Halin Zhao Xueyong Zhao Key Laboratory of Desert and desertification Cold and Arid Regions Environmental and Engineering Research Insti-tuteChinese Academy of SciencesLanzhou Gansu 730000China Department of Botany and Microbiology University of OklahomaNormanOklahoma 73019-0245USA School of Life Sciences Fudan UniversityShanghai 200433China Institute of Tibetan Plateau Research Chinese Academy of SciencesBeijing 100085China

aeolian desertification has rapidly developed in the past 50 years in Northern China,covered an area of 0.386 million km2 by 2000,affected nearly 170 million population,and caused the direct and indirect economic loss of about $6.75(***) billion per *** we present several lines of evidence to demonstrate that human activities guided by policy shifts have been a major force to drive aeolian desertification via changes in land-use patterns and *** is suggested that the desertification can be curbed or even reversed by adopting prevention and control measures with ecologically sound land-use practices in China.

关键词： aeolian desertification climate change drought human activities Northern China

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Land surface roughness impacted by typical vegetation restoration projects on aeolian sandy lands in the Yarlung Zangbo River valley,southern Tibetan plateau

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International Soil and Water Conservation Research 2022年第1期10卷 109-118页

作者： Baojun Zhang Donghong Xiong Yongfa Tang Lin Liu Key Laboratory of Mountain Hazards and Earth Surface Process Institute of Mountain Hazards and EnvironmentChinese Academy of SciencesChengdu610041China College of Water Conservancy and Hydropower Engineering Sichuan Agricultural UniversityYa'an625014China

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.

关键词： aeolian desertification Surface microtopographic variation Near soil surface characteristics Plant communities Yarlung Zangbo River valley

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