• 论文 •

### RELATION BETWEEN PRECIPITATION AND SEDIMENT TRANSPORT IN THE DASHA RIVER WATERSHED

ZHANG Jian-chun1, ZHANG Wei1, LI Ji-hong1, SHI Zhi-gang2, PU Shen-yuan2

1. 1. College of Territorial Resources and Tourism, Anhui Normal University, Wuhu 241000, P. R. China;
2. Water Conservancy Department of Anhui Province, Hefei 230022, P. R. China
• 收稿日期:2003-12-15 出版日期:2004-06-20 发布日期:2011-12-15
• 作者简介:ZHANG Jian-chun(1964- ), male,a native of Nanjing, Jiangsu Province, professor, specialized in physical geography. E-mail: zhangjianchun@263.net
• 基金资助:

Under the auspices of the Natural Science Foundation of Anhui Education Office (No.2003KJ102) and Special Fund Project of Anhui Provincial Irrigation Office (No.2001-11)

### RELATION BETWEEN PRECIPITATION AND SEDIMENT TRANSPORT IN THE DASHA RIVER WATERSHED

ZHANG Jian-chun1, ZHANG Wei1, LI Ji-hong1, SHI Zhi-gang2, PU Shen-yuan2

1. 1. College of Territorial Resources and Tourism, Anhui Normal University, Wuhu 241000, P. R. China;
2. Water Conservancy Department of Anhui Province, Hefei 230022, P. R. China
• Received:2003-12-15 Online:2004-06-20 Published:2011-12-15

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.

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.