摘要
通过对塔里木河中游输水堤防修建后,沙子河口、乌斯满和阿其河口三个断面地下水化学特征自2001年至2005年的时空变化的监测与分析,初步揭示了在输水堤防影响下地下水化学特征变化的初步规律,结果表明,在空间上,沙子河断面地下水中离子含量距离堤防近处高,远处低,与正常状况下距离河道越远含量越低的规律相反,乌斯满断面,地下水化学变化规律受输水堤防的影响不十分明显,但地表积盐严重,阿其河断面,则呈现复杂的变化;在时间上,丰枯期地下水化学特征的正常变化规律在沙子河被彻底改变,在乌斯满和阿其河呈现出复杂变化.各化学组分含量在沙子河断面和乌斯满、阿其河断面的含量及其变化特点与断面间的环境条件的差异显著相关,沙子河断面自堤防修建后就没有地表水经过,而设有生态闸的乌斯满和阿其河断面的一定范围内在丰水期还有地表过水.地下水矿化度及各主要离子含量受地下水埋深的影响极为显著,都随着地下水埋深的增加而上升.
Based on the three monitoring sections： Shazihe section,Usman section and Archihe section,the variation in groundwater chemistry during 2001—2005 was collected and the regulation of groundwater chemical variation influenced by the embankments was analyzed.The results indict that spatial variations in groundwater at Shazihe section is： the nearer to the embankments,the higher concentrations of ions in groundwater,which is opposite to the normal.The changes of groundwater chemical properties were not significantly,but the salt accumulation in topsoil are severe comparing with that before building the embankment.At the Archihe section,the change of groundwater hydrochemical properties caused by building the embankment is complicated.Generally,the content of major ions is lower in flood season than that in dry season at both the Usman section and Archihe Section.However it is opposite at the Shazihe Section.The contents of groundwater chemistry and their variations have close relations to the different environmental factors of the monitoring sections.About Shazihe Section,there had not been water overflowing from the watercourse since the embankments constructed.In contrast,ecological brakes were set in both Usman and Achihe sections,the water supplying in flooding period is relative plenteous.In general,total dissolved solids（TDS） and the concentrations in major ions are determined by the depth of groundwater,they increase directly with the groundwater level going down.
出处
《环境化学》
CAS
CSCD
北大核心
2011年第2期459-465,共7页
Environmental Chemistry
基金
国家自然科学基金(40871239,40871059,40901276)资助
关键词
输水堤防
地下水化学
塔里木河中游
embankment
hydrochemical characteristics
groundwater
the middle reaches of Tarim River
