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中国西部环境和生态科学研究计划 >
2001年资助项目 >
西北干旱区地表-地下水系统变化及其植被生态效应 >
科学论文 >
Please use this identifier to cite or link to this item:
http://hdl.handle.net/2239/2289
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| Title: | 额济纳盆地地下水盐化特征及机理分析 |
| Authors: | Wen, Xiaohu(温小虎)
Wu, Yanqing(仵彦卿)
Su, Jianping(苏建平)
Zhang, Yinghua(张应华)
Liu, Famin(刘发民) |
| Keywords: | 地下水(groundwater)
盐化特征(salinization characteristic)
机理(mechanism)
额济纳盆地(Ejin basin) |
| Issue Date: | Sep-2006 |
| Publisher: | 《中国沙漠》2006，26（5）：836-841. |
| Abstract: | [中文摘要]：运用水文地球化学方法,分析额济纳盆地不同含水层地下水盐化特征及其机理。结果表明:额济纳盆地地下水受水文地质条件的制约,潜水的盐化自沿河主要补给区到蒸发排泄区具有明显的分带性,由河流主要补给区向北和向东西两侧,至居延海,进素土海子和古日乃湖中心洼地地下水,地下水由淡水,逐渐过渡为微咸水、中度咸水及极度咸水、盐水;承压水属于微咸水。依据地下水中各离子含量的比值特征的分析结果,控制本区地下水盐化的主要因素为硅酸盐矿物溶解和蒸发沉积作用,硅酸盐矿物溶解主要发生在沿河的地下水补给区;蒸发沉积作用主要发生在地下水径流-排泄区。深层地下水埋藏较深,蒸发的作用大大减弱,因而含盐量少,水质较好。
[英文摘要]： Salinization is the most widespread form of water contamination.The areas affected by salinization are mainly located in arid and semi-arid regions.Studying the groundwater salinization can help people recognize the evolution of groundwater environment and make a rational use of the groundwater resource.In this study,with groundwater samples collected from different aquifers in lower reaches of Heihe River,we studied the salinization characteristics and mechanisms of groundwater in the Ejin basin by use of the hydrogeological met hod. The shallow groundwater salinization within the area from recharge area to discharge areas howed zonal distribution characte ristic. From t he rive r main recharge area to nort h , east and west , finally to Juyan lake , Jinsut uhaizi and Gurinai lake dep ression , groundwater salinization changed f rom f resh to lightly saline , to mode rately saline and to very saline . The confined groundwate r belongs to the mode rately saline in the study area . From the ionicratio plot , it was showedt hat t he dominant factors of dete rmining the groundwater salinization in the study area were the silicate rock unde rgoing dissolving and evaporatingdepositing. Dissolution mostly occurred in groundwater recharged area along the river course , evaporation and deposition in running-discharge area . The confined groundwater has low salinity less affected by evaporation due to being deeply buried in rock layer . |
| URI: | http://seekspace.resip.ac.cn/handle/2239/2289 |
| Appears in Collections: | 科学论文
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| 额济纳盆地地下水盐化特征及机理分析.pdf | | 1380Kb | Adobe PDF | View/Open |
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