| 神府东胜煤田扰动与原生地面产流产沙规律对比研究 |
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| 引用本文： | 白芸,王文龙,黄鹏飞,李宏伟,王贞,王正利,李仁.神府东胜煤田扰动与原生地面产流产沙规律对比研究[J].水土保持通报,2014(3):33-38. |
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| 作者姓名： | 白芸 王文龙 黄鹏飞 李宏伟 王贞 王正利 李仁 |
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| 作者单位： | 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;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;中国科学院水利部水土保持研究所, 陕西杨凌 712100;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;浙江省水利水电勘测设计院, 浙江杭州 310014;中国水电顾问集团华东勘测设计研究院, 浙江杭州 310014;黄河水利委员会西峰水土保持科学试验站, 甘肃庆阳 745000;吴起县水土保持工作队, 陕西吴起 717600 |
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| 基金项目： | 国家自然科学基金项目"煤矿开发建设中人为侵蚀机理及新增水土流失预报模型:以神府东胜煤田为例"(40771127); 水利部公益性行业专项(201201048),(201201047);中国科学院西部行动计划项目(KZCX2-XB3-13); 黄土高原土壤侵蚀与旱地农业国家重点实验室专项(10502-T1) |
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| 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。
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| 关 键 词： | 神府东胜煤田 扰动地面 原生地面 产流产沙 水流剪切力 |
| 收稿时间： | 2013/7/13 0:00:00 |
| 修稿时间： | 2013/10/29 0:00:00 |
Comparative Study of Runoff and Sediment Yielding from Disturbed and Original Sites in Shenfu-Dongsheng Coalfield |
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| BAI Yun,WANG Wen-long,HUANG Peng-fei,LI Hong-wei,WANG Zhen,WANG Zheng-li and LI Ren.Comparative Study of Runoff and Sediment Yielding from Disturbed and Original Sites in Shenfu-Dongsheng Coalfield[J].Bulletin of Soil and Water Conservation,2014(3):33-38. |
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| Authors: | BAI Yun WANG Wen-long HUANG Peng-fei LI Hong-wei WANG Zhen WANG Zheng-li and LI Ren |
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| Institution: | State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A & F University, Yangling, Shaanxi 712100, China;State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A & F University, Yangling, Shaanxi 712100, China;Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China;Key Laboratory of Soil Erosion and Control, Jiangxi Institute of Soil and Water Conservation, Nanchang, Jiangxi 330029, China;Zhejiang Design Institute of Water Conservancy and Hydroelectric Power, Hangzhou, Zhejiang 310014, China;HydroChina Huadong Engineering Corporation, Hangzhou, Zhejiang 310014, China;Xifeng Experimental Station of Soil and Water Conservation, Qingyang, Gansu 745000, China;Wuqi Soil and Water Conservation Team, Wuqi, Shaanxi 717600, China |
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| 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. |
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| Keywords: | Shenfu-Dongsheng coalfield disturbed site original site runoff and sediment yielding flow shear stress |
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