| 用气象数据估算固定和半固定沙地的起沙速率 |
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| 作者姓名： | HU Xi LIU Lian-You LI Shun-Jiang XIAO Bi-Lin LIU Mu-Xing |
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| 作者单位： | Key Lab of Environment Change and Natural Disaster, Ministry of Education, Beijing Normal Univeristy, Beijing 100875 (China). E-mail: hx9210@163.com;Academy of Disaster Reduction and Emergency Management, Ministry of Civil Affairs/Ministry of Education, Beijing Normal University, Beijing 100875 (China);State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 21008 (China);Key Lab of Environment Change and Natural Disaster, Ministry of Education, Beijing Normal Univeristy, Beijing 100875 (China). E-mail: hx9210@163.com;Academy of Disaster Reduction and Emergency Management, Ministry of Civil Affairs/Ministry of Education, Beijing Normal University, Beijing 100875 (China);Institute of Plant Nutrition and Resources, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097 (China);Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081 (China);Key Lab of Environment Change and Natural Disaster, Ministry of Education, Beijing Normal Univeristy, Beijing 100875 (China). E-mail: hx9210@163.com;Academy of Disaster Reduction and Emergency Management, Ministry of Civil Affairs/Ministry of Education, Beijing Normal University, Beijing 100875 (China) |
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| 基金项目： | *1supported by the National Natural Science Foundation of China (No.40771021);the Ministry of Education ofChina (No.20070027020);the Ministry of Science & Technology of China (Nos.2006BAD20B03 and 2006BAD20B02). |
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| 摘 要： | Taibus County, Inner Mongolia, China, lies in a farming-pastoral ecotone, where severe wind erosion and various aeolian sand hazards are prevalent and fixed and semi-fixed sand dunes occur frequently. This study was conducted to investigate the relationships between sand transportation rate and wind speed for the fixed and semi-fixed sand dunes based on field measurements. The annual quantity of soil erosion by wind was estimated using meteorological wind data. The results indicated that the sand transportation rate in Taibus County in 2000 was 57.38 kg cm-1 year-1 for the semi-fixed dunes and 4.56 kg cm-1 year-1 for the fixed dunes. The total duration of erosive winds covered 12.5% of the time of the year, and spring posed the highest potential of sand transportation. Wind with low speed (≤17 m s-1) and high frequency plays a dominant role in sand transportation, while strong wind (≥17 m s-1) with low frequency significantly enhanced the sand transportation. Erosive wind speed, directions, and frequency were three crucial dynamic factors influencing sand hazards in the farming-pastoral ecotone. The dominant factors intensifying sand and dust storms in Taibus County might be related to the favorable wind condition in combination with the durable drought, which led to land desertification and vegetation degradation.
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| 关 键 词： | fixed and semi-fixed dunes meteorological wind data sand transportation rate wind erosion |
| 收稿时间： | 15 March 2008 |
Estimation of sand transportation rate using meteorological wind data for fixed and semi-fixed dunes |
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| HU Xi,LIU Lian-You,LI Shun-Jiang,XIAO Bi-Lin,LIU Mu-Xing.Estimation of sand transportation rate using meteorological wind data for fixed and semi-fixed dunes[J].Pedosphere,2009,19(1):129-136. |
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| Authors: | HU Xi LIU Lian-You LI Shun-Jiang XIAO Bi-Lin and LIU Mu-Xing |
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| Institution: | Key Lab of Environment Change and Natural Disaster, Ministry of Education, Beijing Normal Univeristy, Beijing 100875 (China);Academy of Disaster Reduction and Emergency Management, Ministry of Civil Affairs/Ministry of Education, Beijing Normal University;Key Lab of Environment Change and Natural Disaster, Ministry of Education, Beijing Normal Univeristy, Beijing 100875 (China);Academy of Disaster Reduction and Emergency Management, Ministry of Civil Affairs/Ministry of Education, Beijing Normal University;Institute of Plant Nutrition and Resources, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097 (China);Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081 (China);Key Lab of Environment Change and Natural Disaster, Ministry of Education, Beijing Normal Univeristy, Beijing 100875 (China);Academy of Disaster Reduction and Emergency Management, Ministry of Civil Affairs/Ministry of Education, Beijing Normal University |
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| Abstract: | Taibus County, Inner Mongolia, China, lies in a farming-pastoral ecotone, where severe wind erosion and various aeolian sand hazards are prevalent and fixed and semi-fixed sand dunes occur frequently. This study was conducted to investigate the relationships between sand transportation rate and wind speed for the fixed and semi-fixed sand dunes based on field measurements. The annual quantity of soil erosion by wind was estimated using meteorological wind data. The results indicated that the sand transportation rate in Taibus County in 2000 was 57.38 kg cm?1 year?1 for the semi-fixed dunes and 4.56 kg cm?1 year?1 for the fixed dunes. The total duration of erosive winds covered 12.5% of the time of the year, and spring posed the highest potential of sand transportation. Wind with low speed (≤ 17 m s?1) and high frequency plays a dominant role in sand transportation, while strong wind (≥ 17 m s?1) with low frequency significantly enhanced the sand transportation. Erosive wind speed, directions, and frequency were three crucial dynamic factors influencing sand hazards in the farming-pastoral ecotone. The dominant factors intensifying sand and dust storms in Taibus County might be related to the favorable wind condition in combination with the durable drought, which led to land desertification and vegetation degradation. |
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| Keywords: | fixed and semi-fixed dunes meteorological wind data sand transportation rate wind erosion |
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