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| 1990—2015年内蒙古高原土壤风蚀时空差异特征 |
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吴晓光1,2,姚云峰1*,迟文峰3,闫旭东2,张宏飞2,金良3,白文科4,秦富仓1
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| (1.内蒙古农业大学 沙漠治理学院, 呼和浩特 010011;2.内蒙古自治区土地整治中心, 呼和浩特 010020;3.内蒙古财经大学 资源与环境经济学院, 呼和浩特 010017;4.西华师范大学 生态研究院, 四川 南充 637002) |
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| 摘要: |
| 基于RWEQ模型定量反演了1990-2015年内蒙古高原不同季节土壤风蚀模数，分析不同季节土壤风蚀差异，揭示植被覆盖对土壤风蚀的响应阈值。结果表明:不同季节土壤风蚀量差异较大，春季、夏季、秋季、冬季土壤风蚀量比例为5.42∶1.00∶1.36∶3.00；土地利用/覆盖状况对土壤风蚀具有重要的影响，不同季节有明显差异，植被覆盖退化后土壤风蚀模数增大，反之降低了土壤风蚀模数，尤其春季中、低覆盖度草地相互转化对土壤风蚀的作用明显；植被覆盖达到75%时可有效抑制土壤风蚀，春季与冬季低覆盖度植被对抑制土壤风蚀作用敏感于高覆盖度植被，当植被覆盖度达20%~25%时可迅速降低土壤风蚀模数。 |
| 关键词: 土壤风蚀 季节差异 土地利用/覆盖 影响特征 响应阈值 |
| DOI：10.11841/j.issn.1007-4333.2020.03.14 |
| 投稿时间：2019-03-11 |
| 基金项目:内蒙古自治区科技计划项目(N224001000409335)；科技基础资源调查专项(2017FY101304-3) |
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| Spatio-temporal characteristics of soil wind erosion in Inner Mongolia Plateau from 1990 to 2015 |
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WU Xiaoguang1,2,YAO Yunfeng1*,CHI Wenfeng3,YAN Xudong2,ZHANG Hongfei2,JIN Liang3,BAI Wenke4,QIN Fucang1
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| (1.College of Desert Control Science and Engineering, Inner Mongolia Agricultural University, Hohhot 010011, China;2.The Center of Inner Mongolia Autonomous Region Land Consolidation and Rehabilitation, Hohhot 010020, China;3.College of Resources and Environmental Economics, Inner Mongolia University of Finance and Economics, Hohhot 010070, China;4.Institute of Ecology, China West Normal University, Nanchong 637002, China) |
| Abstract: |
| The soil wind erosion modulus in different seasons from 1990 to 2015 in Inner Mongolia Plateau was quantitatively retrieved based on RWEQ model in this study. The differences of soil wind erosion among different seasons were analyzed, and the response threshold of soil erosion to vegetation coverage was revealed. The results showed that: The seasonal variation of soil erosion was significant, and the proportion of soil wind erosion in spring, summer, autumn and winter was 5. 42∶1. 00∶1. 36∶3. 00. Land use/cover conditions had important influence on the soil erosion and obvious differences in different seasons. The soil wind erosion modulus increased after the degradation of vegetation coverage, and conversely reduced the soil wind erosion modulus. Especially in spring, the mutual transformation between moderate grassland and sparse grassland had a significant effect on soil wind erosion; The 75% vegetation coverage could effectively control soil erosion. The effect of sparse vegetation fraction calculation on controlling soil wind erosion in spring and winter was more sensitive than dense vegetation. The soil wind erosion modulus reduced rapidly when the vegetation coverage reached 20%-25%. |
| Key words: soil wind erosion seasonal difference land use/cover influencing characteristics response threshold |
