|
|||||
|
|
| 典型岩溶农业区地下水质与土地利用变化分析——以云南小江流域为例 | |
| 引用本文： | 蒋勇军,袁道先,谢世友,李林立,张贵,何绕生.典型岩溶农业区地下水质与土地利用变化分析——以云南小江流域为例[J].地理学报,2006,61(5):471-481. |
| 作者姓名： | 蒋勇军 袁道先 谢世友 李林立 张贵 何绕生 |
| 作者单位： | 1. 西南大学资源与环境科学学院,重庆,400715;西南大学岩溶环境与石漠化治理研究所,重庆,400715 2. 西南大学资源与环境科学学院,重庆,400715;西南大学岩溶环境与石漠化治理研究所,重庆,400715;中国地质科学院岩溶地质研究所,国土资源部岩溶动力学开放研究实验室,桂林,541000 3. 西南大学资源与环境科学学院,重庆,400715 4. 云南省地质调查院,昆明,650041 |
| 基金项目： | 西南大学校科研和教改项目;西南大学校科研和校改项目;重庆市科委科研项目;国土资源部科研项目 |
| 摘 要： | 以云南省泸西县小江典型岩溶农业流域为研究单元,利用1982和2004的地下水质数据及1982的航片和2004年的TM影像,在GIS支持下,研究其20年来的地下水质的时空变化及原因.结果表明：20年来流域地下水质在时间、空间分布上均发生较大的变化;流域耕地扩张和大量化肥、农药使用带来的非点源污染,造成地下水中的NH^4＋、SO4^2-、NO3^-、NO2^-、Cl^-离子含量及pH值、总硬度、总碱度明显升高并超标,而林地减少或林地质量的下降,土地发生石漠化时,地下水中的Ca^2＋、HCO3^-浓度明显降低,同时,地下水各指标的空间变化与土地利用空间格局的变化表现出动态一致性. |
| 关 键 词： | 地下水质 土地利用 岩溶农业区 小江流域 |
| 收稿时间： | 2005-11-28 |
| 修稿时间： | 2006-02-18 |
The Groundwater Quality and Land Use Change in a Typical Karst Agricultural Region: A Case Study of Xiaojiang Watershed, Yunnan |
|
| JIANG Yongjun,YUAN Daoxian,XIE Shiyou,LI Linli,ZHANG Gui,HE Raosheng.The Groundwater Quality and Land Use Change in a Typical Karst Agricultural Region: A Case Study of Xiaojiang Watershed, Yunnan[J].Acta Geographica Sinica,2006,61(5):471-481. | |
| Authors: | JIANG Yongjun YUAN Daoxian XIE Shiyou LI Linli ZHANG Gui HE Raosheng |
| Institution: | 1. College of Resources and Environment Science, Southwest University, Chongqing 400715, China; 2. Research Institute of Karst Environment and Rocky Desert Control, Southwest University, Chongqing 400715, China; 3. Institute of Geology Investigation in Yunnan Province, Kunming 650041, China; 4. Institute of Karst Geology, CAGS, Karst Dynamics Laboratory, MLR, Guilin 541004, China |
| Abstract: | The present study analyzed the temporal and spatial changes of groundwater quality from 1982 to 2004 in Xiaojiang watershed, Yunnan, Southwest China. The results indicate: (1) There were obvious temporal and spatial changes of groundwater quality in Xiaojing watershed from 1982 to 2004. The total hardness, total alkalinity, pH, Mg2 , NH 4, SO2-4, Cl-, NO-3 and NO-2 of the groundwater increased significantly, but the Ca2 and HCO-3 showed an obvious declining trend during the past 20 years in Xiaojiang watershed. Furthermore, the concentrations of NH 4, NO-3 and NO-2 of groundwater exceeded the drinking water standards in 2004. (2) The total land transformed covers 610.12 km2, of which 134.29 km2 of forestland were transformed into cultivated land, and 210 km2 of unused land was transformed into cultivated land, and the construction land increased by 71.8% during the past 20 years in Xiaojiang watershed. (3) The groundwater quality change is related to the non-point pollution of massive use of fertilizers and pesticides due to the expansion of cultivated land and the deterioration of eco-environment bought by the worsening of forestland quality. As forestland and unused land transformed into cultivated land, the total hardness, total alkalinity, pH, and the concentrations of NH 4, SO2-4, NO-3, NO-2, and Cl- in the groundwater increased significantly, but the concentrations of Ca2 and HCO-3 in the groundwater declined obviously. |
| Keywords: | GIS |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |
| 点击此处可从《地理学报》浏览原始摘要信息 | |
| 点击此处可从《地理学报》下载免费的PDF全文 | |