Comparative Study of Runoff and Sediment Yielding from Disturbed and Original Sites in Shenfu-Dongsheng Coalfield

BAI Yun; WANG Wen-long; HUANG Peng-fei; LI Hong-wei; WANG Zhen; WANG Zheng-li; LI Ren

doi:10.13961/j.cnki.stbctb.2014.03.008

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Comparative Study of Runoff and Sediment Yielding from Disturbed and Original Sites in Shenfu-Dongsheng Coalfield

- Comparative Study of Runoff and Sediment Yielding from Disturbed and Original Sites in Shenfu-Dongsheng Coalfield
- Bulletin of Soiland Water Conservation Vol. 33, Issue 3, Pages: 33-38(2014)
- 作者机构：
  
  1. 西北农林科技大学水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室, 陕西杨凌,712100
  2. 中国科学院水利部水土保持研究所, 陕西杨凌,712100
  3. 江西省水土保持科学研究院土壤侵蚀与防治重点实验室,江西,南昌,330029
  4. 浙江省水利水电勘测设计院,浙江,杭州,310014
  5. 中国水电顾问集团华东勘测设计研究院,浙江,杭州,310014
  6. 黄河水利委员会西峰水土保持科学试验站,甘肃,庆阳,745000
  7. 吴起县水土保持工作队, 陕西吴起,717600
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2014.03.008
  CLC：
- Published：2014
- 稿件说明：
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BAI Yun, WANG Wen-long, HUANG Peng-fei, et al. Comparative Study of Runoff and Sediment Yielding from Disturbed and Original Sites in Shenfu-Dongsheng Coalfield[J]. Bulletin of Soiland Water Conservation, 2014, 33(3): 33-38.
DOI：

BAI Yun, WANG Wen-long, HUANG Peng-fei, et al. Comparative Study of Runoff and Sediment Yielding from Disturbed and Original Sites in Shenfu-Dongsheng Coalfield[J]. Bulletin of Soiland Water Conservation, 2014, 33(3): 33-38. DOI： 10.13961/j.cnki.stbctb.2014.03.008.

摘要

采用野外人工模拟降雨试验方法

对神府东胜煤田开发建设中原生和扰动地面的产流、产沙规律进行了研究。结果表明

扰动地面径流起始时间是原生地面的1.8~11.7倍

径流率比原生地面小5%~54.4%;初始径流含沙量是原生地面的1.1~5.8倍

径流含沙量是原生地面的1.2~6.3倍

产沙量是原生地面的2~12.7倍。由于扰动地面质地疏松

孔隙度大

入渗率大

与原生地面相比

一般在强降水条件下才产流并发生侵蚀。扰动地面临界抗剪力较小

侵蚀一旦发生

在相同降水条件下

更易发生侵蚀

且其侵蚀强度更大。通过回归分析

得出两种下垫面产沙量与水流剪切力呈线性相关。

Abstract

The objective of this study was to investigate the law of runoff and sediment yielding from original and disturbed sites in the Shenfu-Dongsheng coalfield by a simulated rainfall experiment. Results showed that the time for runoff initiation in disturbed sites was 1.8 to 11.7 times that in original sites. However

runoff rate for disturbed sites was 5% to 54.4% less than that for original sites. The initial sediment concentration

average sediment concentration and sediment yield in disturbed sites were 1.1 to 5.8

1.2 to 6.3

and 2 to 12.7 times of those in original sites

respectively. Runoff and soil erosion in disturbed sites occurred under high intensive rainfall because of lower bulk density

higher porosity and greater infiltration rate as compared with original sites. Once erosion began

disturbed sites were subject to erosion under the same rainfall condition due to smaller critical shear resistance and could result in larger erosion rate. It was found by regression analysis

there existed a linear relationship between sediment yield and flow shear stress.

关键词

Keywords

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