| 采煤沉陷对风沙区土壤非饱和水分入渗的影响 |
| |
| 引用本文： | 臧荫桐,丁国栋,高永,汪季,何志,周瑞平,王健.采煤沉陷对风沙区土壤非饱和水分入渗的影响[J].水科学进展,2012,23(6):757-767. |
| |
| 作者姓名： | 臧荫桐 丁国栋 高永 汪季 何志 周瑞平 王健 |
| |
| 作者单位： | 1. 北京林业大学水土保持学院, 北京 100083;2. 内蒙古农业大学生态环境学院, 内蒙古呼和浩特 010019;3. 鄂尔多斯市林业工作站, 内蒙古鄂尔多斯 017000;4. 内蒙古师范大学地理科学学院, 内蒙古呼和浩特 010022;5. 水利部牧区水利科学研究所, 内蒙古呼和浩特 010020 |
| |
| 基金项目： | 国家林业局林业公益性行业科研专项经费资助项目(200804022A);“十一五”国家科技支撑计划资助项目(2006BAD03A0307)~~ |
| |
| 摘 要： | 为研究采煤沉陷后风沙区土壤水分入渗变化规律,通过定水头注水结合入渗湿润峰测定的方法,对毛乌素沙地南缘补连塔矿区沉陷于2004、2005年的2个沉陷区土壤水分非饱和入渗变化进行研究,结果表明,垂直入渗观测时段(入渗开始后0~175 min)后期,与坡面剖面相比,丘间低地较多剖面垂直湿润峰的间距明显较大,垂直入渗持续能力较强。2004年沉陷区坡面未裂处平均垂直入渗速率、第175 min垂直入渗深度显著超过对照区坡面(P<0.05),2005年沉陷区坡面未裂处平均侧渗速率显著超过对照区坡面(P<0.05)。沉陷区丘间低地垂直入渗速率在入渗10 min左右前期升高后期降低,侧渗速率在入渗10~12 min的前期升高后期降低;沉陷区坡面垂直入渗速率、侧渗速率在大部分观测时段内升高。因子分析表明沉陷区入渗特征是丘间低地垂直入渗偏强,坡面侧渗偏强。
|
| 关 键 词： | 采煤沉陷 风沙区 垂直入渗 侧渗 湿润峰 土壤水分 |
| 收稿时间： | 2011-12-02 |
Effects of coal mining subsidence on infiltration into unsaturated soils in sand drift areas |
| |
| ZANG Yin-tong,DING Guo-dong,GAO Yong,WANG Ji,HE Zhi,ZHOU Rui-ping,WANG Jian.Effects of coal mining subsidence on infiltration into unsaturated soils in sand drift areas[J].Advances in Water Science,2012,23(6):757-767. |
| |
| Authors: | ZANG Yin-tong DING Guo-dong GAO Yong WANG Ji HE Zhi ZHOU Rui-ping WANG Jian |
| |
| Institution: | 1. School of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China;2. College of Ecology and Environmental Science, Inner Mongolia Agricultural University, Huhhot 010019, China;3. Forestry Working Station of Ordos City, Ordos 017000, China;4. College of Geographical Science, Inner Mongolia Normal University Hohhot 010022, China;5. Institute of Water Resources for Pasturing Area, Ministry of Water Resources, Hohhot 010020, China |
| |
| Abstract: | A constant-head injection test with wetting front observation is conducted to investigate the effect of coal mining subsidence on infiltration into unsaturated soils in sand drift areas. The test is done on two subsidence sites that are formed in 2004 and 2005, and the two sites are located in the Bulianta mining area of southeast Mu Us Sandy Land. Results show that towards the end of the observation period (0-175 min), bigger distances of wetting fronts can be observed at many lowland locations with a sustainable infiltration capacity compared to that of observations on soil slopes. At the 2004 subsidence site with no cracks, both mean vertical infiltration rate and 175-minute infiltration depth are significantly larger than that of observations on the corresponding soil slope (P<0.05) in a control area. The same is true for the mean lateral seepage rate at the 2005 subsidence site with no cracks. At the subsidence sites, the vertical infiltration rate increases during the first ten minutes of the test in lowland locations, and then decreases afterwards. The rate increase can be found during most of the test time on soil slopes. While for the lateral seepage infiltration rate, such an increase is found during the first ten to twelve minutes and followed by a decrease afterwards. The rate increase can also be found during most of the test time on soil slopes. The factor analysis reveals a high vertical inflation rate at lowland locations, and the same is true for the lateral seepage rate on soil slopes. The findings can be seen as the main infiltration characteristics of unsaturated soils in sand drift areas. |
| |
| Keywords: | coal mining subsidence sand drift area vertical infiltration lateral seepage wetting front |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《水科学进展》浏览原始摘要信息 |
| 点击此处可从《水科学进展》下载免费的PDF全文 |
|
