Runoff and Sediment Variations Due to Human Activities in Dashahe Watershed of Southwest Region of Anhui Province

ZHANG Jian chun; SHI Zhi gang; PU Shen yuan

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Runoff and Sediment Variations Due to Human Activities in Dashahe Watershed of Southwest Region of Anhui Province

- Runoff and Sediment Variations Due to Human Activities in Dashahe Watershed of Southwest Region of Anhui Province
- Bulletin of Soiland Water Conservation Vol. 25, Issue 1, Pages: 6-9(2006)
- 作者机构：
  
  1. 杭州师范学院人文学院,浙江,杭州,310036
  2. 安徽省水利厅,安徽,合肥,230022
- 作者简介：
- 基金信息：
- DOI：
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- Published：2006
- 稿件说明：
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ZHANG Jian chun, SHI Zhi gang, PU Shen yuan. Runoff and Sediment Variations Due to Human Activities in Dashahe Watershed of Southwest Region of Anhui Province[J]. Bulletin of Soiland Water Conservation, 2006, 25(1): 6-9.
DOI：

ZHANG Jian chun, SHI Zhi gang, PU Shen yuan. Runoff and Sediment Variations Due to Human Activities in Dashahe Watershed of Southwest Region of Anhui Province[J]. Bulletin of Soiland Water Conservation, 2006, 25(1): 6-9. DOI：

摘要

安徽省大别山区是我国水土流失较为严重的地区之一

水土流失使山丘区的生态环境日趋恶化

给人民生产生活带来了严重的危害。以大沙河1970-2000年不同洪枯水期水沙变化特征及其与人类治理前后变化的关系研究说明

大沙河流域从20世纪80年代以来由于人类活动的影响

河流输沙量和产沙模数均大大降低

枯水期水量上升

说明

水土流失发生了明显的变化。通过数学模型定量的计算了大沙河流域人类活动对泥沙输移减少的贡献率平均为65.6%

而同期径流和降雨对泥沙减少的贡献率平均则为34.4%。因此

在大沙河流域采用生物和工程措施治理水土流失是非常重要的。

Abstract

Soil and water loss is now a major environmental problem in the Dabie mountain area of Anhui Province

which results in ecological and environmental degradation

and is harmful to local people's life and production.Based on the long-term hydrologic records of the Dasha River

authors analysed the human effects on the hydrological regimes in different times since 1970.Results show that human activities significantly reduce flood and sediment discharge and increase runoff in a dry season.The average contributive ratio affecting soil erosion by human activities is 65.6%

and at the same period the contributive ratio by runoff and rainfall is 34.4%.So

it is necessary to adopt the biological and engineering measures to solve soil and water loss problems in the Dasha River.

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