内蒙古达里诺尔湖流域地表水和地下水环境同位素特征及补给关系  

Characteristics of environmental isotopes of surface water and groundwater and their recharge relationships in Lake Dali basin

作　　者：甄志磊[1] 李畅游[1] 李文宝[1] 胡其图 刘晓旭[1] 刘志娇 于瑞雪[1] 

机构地区：[1]内蒙古农业大学水利与土木建筑工程学院,呼和浩特010018 [2]赤峰市克旗达里诺尔国家级自然保护区生态旅游有限公司,赤峰025373

出　　处：《湖泊科学》2014年第6期916-922,共7页Journal of Lake Sciences

基　　金：国家自然科学基金项目(51169017);内蒙古自治区重大科技项目(20091408);内蒙古自然科学基金项目(2012MS0615)联合资助

摘　　要：为了探明达里诺尔湖流域地表水与地下水的氢(H)、氧(O)同位素的变化特征及相互补给关系,于2013年对达里诺尔湖及其周围的河水、井水、泉水中H、O同位素进行了取样分析,并结合总溶解性固体悬浮物(TDS)和区域水文地质对达里诺尔湖流域的补给关系进行讨论分析.结果表明:1)河水、泉水、井水中H、O同位素的值基本落在全球雨水线上,湖水H、O同位素落在全球雨水线的右下方,说明河水、井水、泉水没有发生蒸发分馏,而湖水则发生较大程度的蒸发分馏;对达里诺尔湖流域地表水与地下水的H、O同位素进行回归模拟,得出该区域的蒸发趋势线方程:δD=4.8753δ18O-20.139(n=32,R2=0.9968).蒸发线表明,这些水样具有相同水源的特征.2)从实地考察发现,泉水补给河水,泉水和河水补给湖水,同时井水、泉水和河水有相似的δD、δ18O和TDS值,且不随季节变化而变化,推断达里诺尔湖附近地下水补给湖水;区域水文地质条件亦证明达里诺尔湖周边地下水补给湖水.To examine the characteristics of hydrogen and oxygen isotopes change in surface water and groundwater and their relationships of discharge and recharge in the Lake Dali basin,the hydrogen and oxygen isotopes were detected from the water samples of rivers,wells and springs around the Lake Dali in 2013.The discharge-recharge relationship in the Lake Dali basin was analyzed with regional hydrogeology and total dissolved solids（TDS） of the lake.The results showed that 1） the values of hydrogen and oxygen isotopes in the rivers,springs and wells are all on the globe rainfall lines,while those in the lake are at the right below the globe rainfall line.It means there was no evaporation in the rivers,wells and springs,but a larger evaporation in the lake.The regression analysis of groundwater and lake water of the Lake Dali basin was performed and the regional evaporation equation is δD =4.8753 δ^18 O-20.139 （n =32,R^2 =0.9968）.The evaporation equation showed that the water samples have the characteristics of identical water source.2） It is observed that springs recharge rivers and both of them recharge lake.Meanwhile,springs,rivers and lake have the similar values of δD,δ^18O and TDS,and the values do not change with seasons.It can conclude that the groundwater around Lake Dali recharges the lake,and it is also proved with regional hydrogeological conditions.

关 键 词：氢氧同位素 固体悬浮物 地下水 地表水 补给关系 达里诺尔湖 

分 类 号：P339[天文地球—水文科学]