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| 不同地下水埋深污灌硝态氮对土壤-地下水环境影响试验研究 | |
| 引用本文： | 刘伟佳,吴军虎,彭忠福.不同地下水埋深污灌硝态氮对土壤-地下水环境影响试验研究[J].节水灌溉,2012(3):51-56. |
| 作者姓名： | 刘伟佳 吴军虎 彭忠福 |
| 作者单位： | 1. 西安理工大学教育部西北水资源与环境生态重点实验室,陕西西安710048／江西省水利规划设计院,江西南昌330029 2. 西安理工大学教育部西北水资源与环境生态重点实验室,陕西西安,710048 3. 江西省水利规划设计院,江西南昌,330029 |
| 基金项目： | 黄土高原土壤侵蚀与旱地农业国家重点实验室基金，陕西省教育厅科研计划项目，陕西省重点学科建设项目 |
| 摘 要： | 地下水埋深是影响污灌污染物在土壤-地下水系统中运移特性的主要因素之一。通过室内污水入渗试验,研究了不同地下水埋深条件下污灌污染物NO3--N在土壤中的运移特性及对地下水环境的影响。研究结果表明:地下水埋深的不同导致了土壤内水分分布和NO3--N迁移路径的差异,从而影响了NO3--N在土壤-地下水系统中的运移特性。埋深浅,高土水势能和反硝化潜势制约了污水携带NO3--N向下层土壤迁移淋失的趋势,但高土水势能和短迁移路径使下层土壤基质中的NO3--N易被挤入至地下水中,NO3--N污染地下水风险较大。 |
| 关 键 词： | 污水灌溉 土壤-地下水 地下水埋深 硝态氮 迁移特性 |
Research on nitrate to negative effect of soil and groundwater environment at different groundwater depth with sewage irrigation |
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| LIU Wei-jia,WU Jun-hu,PENG Zhong-fu.Research on nitrate to negative effect of soil and groundwater environment at different groundwater depth with sewage irrigation[J].Water Saving Irrigation,2012(3):51-56. | |
| Authors: | LIU Wei-jia WU Jun-hu PENG Zhong-fu |
| Institution: | 1.Key Laboratory of Northwest Water Resources and Environment Ecology, Ministry of Education,Xi’an University of Technology,Xi’an 710048,China; 2.Jiang Xi Provincial Water Conservancy Planning and Designing Institute,Nanchang 330029,China) |
| Abstract: | Groundwater depth is one of main factors affecting the migration of sewage irrigation pollutants in soil and groundwater system.This paper analyzed the transportation characteristic of nitrate in soil and groundwater under different groundwater depth through laboratory experiments with sewage irrigation.The results indicated that the effects of different groundwater depth on soil and groundwater environment,including the distribution of soil water and migration path of nitrate,were significant.Under the lower groundwater depth,although the higher soil moisture potential energy and denitrification restrict the migration tendency of nitrate in sewage from up to down,the higher soil moisture potential energy and shorter migration path make it easy for the nitrate of soil matrix to be pushed from subsoil to groundwater,then the pollution risk of groundwater increased. |
| Keywords: | sewage irrigation groundwater environment groundwater depth nitrate mobility characteristics |
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