大沽河下游地区地下水及地表植被对截渗墙的响应  

Response of groundwater and vegetation to the cutoff wall in the lower reaches of Dagu River

作　　者：郭鑫[1] 赵全升[1] 张建伟 冯娟[1] 许颖[1] 

机构地区：[1]青岛大学环境科学系,青岛266071 [2]青岛地质工程勘察院,青岛266071

出　　处：《干旱区资源与环境》2014年第1期142-147,共6页Journal of Arid Land Resources and Environment

基　　金：国家自然科学基金资助项目(41202175);山东省自然科学基金资助项目(ZR2011DM001);青岛市公共领域科技支撑计划项目(11-2-3-64-nsh)资助

摘　　要：为了解大沽河下游地区在建设地下截渗墙之后对地下水位、水质及地表植被的影响,在野外调查、观测及资料收集的基础上,利用地学理论、数理统计方法及3S技术,对该地区浅层地下水位、水质时空变化及其对NDVI指数的影响等进行了深入分析。结果表明：1）大沽河下游地区年内地下水位呈现出单峰单谷曲线,最高水位发生频率最高的时期是9~10月,最低水位发生频率最高的时期是6~7月。截渗墙明显起到了涵养水源的作用,抬升了截渗墙北侧的地下水位,平复了截渗墙的地下水漏斗。2）至2011年截渗墙北侧地下水中Cl-含量下降明显,水质变好。3）研究区域NDVI总体呈逐渐增加的态势,一定程度上表明区域植被覆盖状况明显增加。In order to understand the effects of construction of underground Cutoff Wall on the groundwater levels,water quality and vegetation in Dagu River downstream areas,on the basis of field investigation,observation and data collection,we used theory,mathematical statistics method and 3S technology,analyzed on the shallow groundwater levels,water quality,temporal and spatial variation and its impact on the NDVI index.The results show that： ①Groundwater showed a unimodal single valley curve in the downstream areas of Dagu River during the year.The period of the highest frequency of highest water level was from September to October,the lowest water level was from June to July.Cutoff Wall was obviously played a role in water conservation,also uplifted the groundwater table and subside the groundwater funnel of Cutoff Wall in the north side.②Untill 2011,the Clcontent in groundwater of Cutoff Wall in the north side decreased significantly and the water quality became good,which explains that on the one hand the Cutoff Wall blocked the channel seawater intrusion,on the other hand the formed terrain conditions remains aquifers underground saltwater body washed Cutoff Wall in upstream.③The regional NDVI overall was gradually increased situational,to some extent,showed that the regional vegetation cover increased significantly.

关 键 词：截渗墙 数理统计 地下水位 大沽河 水质 NDVI 

分 类 号：P641[天文地球—地质矿产勘探]