| RELATION BETWEEN PRECIPITATIONAND SEDIMENT TRANSPORT IN THE DASHA RIVER WATERSHED |
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| 引用本文： | ZHANGJian-chun ZHANGWei L1Ji-hong SHIZhi-gang PUShen-yuan. RELATION BETWEEN PRECIPITATIONAND SEDIMENT TRANSPORT IN THE DASHA RIVER WATERSHED[J]. 中国地理科学(英文版), 2004, 14(2): 129-134. DOI: 10.1007/s11769-004-0020-4 |
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| 作者姓名： | ZHANGJian-chun ZHANGWei L1Ji-hong SHIZhi-gang PUShen-yuan |
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| 作者单位： | [1]CollegeofTerritorialResourcesandTourism,AnhuiNormalUniversity,Wuhu241000,P.R.China [2]WaterConservancyDepartmentofAnhuiProuince,Hefei230022,P.R.China |
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| 基金项目： | Under the auspices of the Natural Science Foundation of Anhui Education Office (No. 2003KJ102)，Special Fund Project of Anhui Provincial Irrigation Office (No. 2001-11) |
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| 摘 要： | The study on sediment production and its relationship with climatic and hydrological factors in watershed is a major environment issue of concern in the international community. Based on the observational records covering the period from 1954 to 1999, the characteristics of precipitation changing over the Dasha River Watershed in Anhui Province and its relation to sediment yield were studied using tendency analysis and correlation analysis.Results showed that the precipitation of the Dasha River Watershed has high variability. In those 46 years, 34% of spring rainfall, 58% of summer rainfall and 30% of annual rainfall will be considered anomaly. The gray correlation analysis shows that sediment discharge correlates most closely with the frequency of the rainstorm with a daily precipitation above 100mm, secondly with the frequency of the rainstorm with a daily precipitation of 50-100mm, and thirdly with the number of rainy days. Their correlation coefficients are 0.98,0.90 and 0.85 respectively. In addition,the paper suggests the major countermeasures and methods for controlling of soil and water losses in this area.
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| 关 键 词： | 降雨 土砂流量 水文学 气候因素 |
| 收稿时间： | 2003-12-15 |
Relation between precipitation and sediment transport in the Dasha River Watershed |
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| Zhang Jian-chun,Zhang Wei,Li Ji-hong,Shi Zhi-gang,Pu Shen-yuan. Relation between precipitation and sediment transport in the Dasha River Watershed[J]. Chinese Geographical Science, 2004, 14(2): 129-134. DOI: 10.1007/s11769-004-0020-4 |
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| Authors: | Zhang Jian-chun Zhang Wei Li Ji-hong Shi Zhi-gang Pu Shen-yuan |
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| Affiliation: | (1) College of Territorial Resources and Tourism, Anhui Normal University, 241000 Wuhu, P. R. China;(2) Water Conservancy Department of Anhui Province, 230022 Hefei, P. R. China |
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| Abstract: | The study on sediment production and its relationship with climatic and hydrological factors in watershed is a major environment issue of concern in the international community. Based on the observational records covering the period from 1954 to 1999, the characteristics of precipitation changing over the Dasha River Watershed in Anhui Province and its relation to sediment yield were studied using tendency analysis and correlation analysis. Results showed that the precipitation of the Dasha River Watershed has high variability. In those 46 years, 34% of spring rainfall, 58% of summer rainfall and 30% of annual rainfall will be considered anomaly. The gray correlation analysis shows that sediment discharge correlates most closely with the frequency of the rainstorm with a daily precipitation above 100mm, secondly with the frequency of the rainstorm with a daily precipitation of 50-100mm, and thirdly with the number of rainy days. Their correlation coefficients are 0.98,0.90 and 0.85 respectively. In addition, the paper suggests the major countermeasures and methods for controlling of soil and water losses in this area. |
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| Keywords: | rainfall sediment discharge Dasha River Watershed |
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