The assessment of soil loss by water erosion in China
Soil erosion is a major environmental problem in China. Planning for soil erosion control requires accurate soil erosion rate and spatial distribution information. The aim of this article is to present the methods and results of the national soil erosion survey of China completed in 2011. A multi-st...
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| Format: | Article |
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KeAi Communications Co., Ltd.
2020-12-01
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| Series: | International Soil and Water Conservation Research |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2095633920300472 |
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| author | Baoyuan Liu Yun Xie Zhiguang Li Yin Liang Wenbo Zhang Suhua Fu Shuiqing Yin Xin Wei Keli Zhang Zhiqiang Wang Yingna Liu Ying Zhao Qiankun Guo |
| author_facet | Baoyuan Liu Yun Xie Zhiguang Li Yin Liang Wenbo Zhang Suhua Fu Shuiqing Yin Xin Wei Keli Zhang Zhiqiang Wang Yingna Liu Ying Zhao Qiankun Guo |
| author_sort | Baoyuan Liu |
| collection | DOAJ |
| description | Soil erosion is a major environmental problem in China. Planning for soil erosion control requires accurate soil erosion rate and spatial distribution information. The aim of this article is to present the methods and results of the national soil erosion survey of China completed in 2011. A multi-stage, unequal probability, systematic area sampling method was employed. A total of 32,948 sample units, which were either 0.2–3 km2 small catchments or 1 km2 grids, were investigated on site. Soil erosion rates were calculated with the Chinese Soil Loss Equation in 10 m by 10 m grids for each sample unit, along with the area of soil loss exceeding the soil loss tolerance and the proportion of area in excess of soil loss tolerance relative to the total land area of the sample units. Maps were created by using a spatial interpolation method at national, river basin, and provincial scales. Results showed that the calculated average soil erosion rate was 5 t ha−1 yr−1 in China, and was 18.2 t ha−1 yr−1 for sloped, cultivated cropland. Intensive soil erosion occurred on cropland, overgrazing grassland, and sparsely forested land. The proportions of soil loss tolerance exceedance areas of sample units were interpolated through the country in 250 m grids. The national average ratio was 13.5%, which represents the area of land in China that requires the implementation of soil conservation practices. These survey results and the maps provide the basic information for national conservation planning and policymaking. |
| first_indexed | 2024-03-07T17:08:35Z |
| format | Article |
| id | doaj.art-2688e07477c74323aac041bf2220eaef |
| institution | Directory Open Access Journal |
| issn | 2095-6339 |
| language | English |
| last_indexed | 2024-03-07T17:08:35Z |
| publishDate | 2020-12-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | International Soil and Water Conservation Research |
| spelling | doaj.art-2688e07477c74323aac041bf2220eaef2024-03-03T02:19:00ZengKeAi Communications Co., Ltd.International Soil and Water Conservation Research2095-63392020-12-0184430439The assessment of soil loss by water erosion in ChinaBaoyuan Liu0Yun Xie1Zhiguang Li2Yin Liang3Wenbo Zhang4Suhua Fu5Shuiqing Yin6Xin Wei7Keli Zhang8Zhiqiang Wang9Yingna Liu10Ying Zhao11Qiankun Guo12Faculty of Geographical Science, Beijing Normal University, Beijing, 100875, ChinaFaculty of Geographical Science, Beijing Normal University, Beijing, 100875, China; Corresponding author.Soil Conservation Monitoring Centre, Ministry of Water Resources of People’s Republic of China, Beijing, 100053, ChinaInstitute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, ChinaFaculty of Geographical Science, Beijing Normal University, Beijing, 100875, ChinaFaculty of Geographical Science, Beijing Normal University, Beijing, 100875, ChinaFaculty of Geographical Science, Beijing Normal University, Beijing, 100875, ChinaFaculty of Geographical Science, Beijing Normal University, Beijing, 100875, ChinaFaculty of Geographical Science, Beijing Normal University, Beijing, 100875, ChinaFaculty of Geographical Science, Beijing Normal University, Beijing, 100875, ChinaFaculty of Geographical Science, Beijing Normal University, Beijing, 100875, ChinaChina Institute of Water Resources and Hydropower Research, Ministry of Water Resources of People’s Republic of China, Beijing, 100038, ChinaChina Institute of Water Resources and Hydropower Research, Ministry of Water Resources of People’s Republic of China, Beijing, 100038, ChinaSoil erosion is a major environmental problem in China. Planning for soil erosion control requires accurate soil erosion rate and spatial distribution information. The aim of this article is to present the methods and results of the national soil erosion survey of China completed in 2011. A multi-stage, unequal probability, systematic area sampling method was employed. A total of 32,948 sample units, which were either 0.2–3 km2 small catchments or 1 km2 grids, were investigated on site. Soil erosion rates were calculated with the Chinese Soil Loss Equation in 10 m by 10 m grids for each sample unit, along with the area of soil loss exceeding the soil loss tolerance and the proportion of area in excess of soil loss tolerance relative to the total land area of the sample units. Maps were created by using a spatial interpolation method at national, river basin, and provincial scales. Results showed that the calculated average soil erosion rate was 5 t ha−1 yr−1 in China, and was 18.2 t ha−1 yr−1 for sloped, cultivated cropland. Intensive soil erosion occurred on cropland, overgrazing grassland, and sparsely forested land. The proportions of soil loss tolerance exceedance areas of sample units were interpolated through the country in 250 m grids. The national average ratio was 13.5%, which represents the area of land in China that requires the implementation of soil conservation practices. These survey results and the maps provide the basic information for national conservation planning and policymaking.http://www.sciencedirect.com/science/article/pii/S2095633920300472National soil erosion surveyCSLESample unitsChinese soil loss mapSoil erosion rateRatio of soil erosion area |
| spellingShingle | Baoyuan Liu Yun Xie Zhiguang Li Yin Liang Wenbo Zhang Suhua Fu Shuiqing Yin Xin Wei Keli Zhang Zhiqiang Wang Yingna Liu Ying Zhao Qiankun Guo The assessment of soil loss by water erosion in China International Soil and Water Conservation Research National soil erosion survey CSLE Sample units Chinese soil loss map Soil erosion rate Ratio of soil erosion area |
| title | The assessment of soil loss by water erosion in China |
| title_full | The assessment of soil loss by water erosion in China |
| title_fullStr | The assessment of soil loss by water erosion in China |
| title_full_unstemmed | The assessment of soil loss by water erosion in China |
| title_short | The assessment of soil loss by water erosion in China |
| title_sort | assessment of soil loss by water erosion in china |
| topic | National soil erosion survey CSLE Sample units Chinese soil loss map Soil erosion rate Ratio of soil erosion area |
| url | http://www.sciencedirect.com/science/article/pii/S2095633920300472 |
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