摘要
在达里诺尔湖中,布设了12个采样点,于2015年8月15日和2016年8月15日(夏季)、2016年1月15～16日和2018年1月15～16日(冬季),分别采集了达里诺尔湖的冰样和水样,并采集了达里诺尔湖周边河水的水样,分析各样品中氢、氧稳定同位素(δD、δ18O)的分布特征,并分析了δD值、δ18O值分别与水中总溶解性固体含量、溶解氧含量和水的电导率的关系。研究结果表明,达里诺尔湖冰、水样品的δD值、δ18O值都大于周边河水;冬季湖泊冰样的δD值、δ18O值最大,分别为-22.11‰和-0.79‰,夏季湖水样品的δD值、δ18O值最小,分别为-32.34‰和-2.05‰;受河水输入的影响,亮子河和贡格尔河入湖口附近的采样点的冰、水样的δD值、δ18O值都比其它采样点小;冬季底层(深度为60～70 cm)冰样的δD值、δ18O值大于表层(深度为0～10 cm)的,而冬季和夏季表层(深度为0～10 cm)水样的δD值、δ18O值都大于其底层(深度>700 cm);冬季和夏季冰、水样的δD值、δ18O值都与水中溶解氧含量显著正相关,而与电导率和总溶解性固体含量显著负相关,表明δD、δ18O值受湖水水质的影响。
To discuss the spatial variation characteristics of hydrogen and oxygen stable isotopes(δD andδ18 O)values and analyze the influencing factors,12 sample sites were set in Dalinor Lake and water(ice)samples were collected from the Dalinor Lake,and rivers samples around the lake on August 15 of 2015,August 15 of2016,January 15-16 of 2016 and January 15-16 of 2018.Meanwhile,the relationship of physicochemical indexes(total dissolved solid,dissolved oxygen and conductivity)andδD andδ18 O values were analyzed.The result showed that theδD andδ18 O values of water(ice)in Dalinor Lake were higher than those in rivers around the lake.In addition,theδD andδ18 O values in the ice of the lake were the highest,with average values about-22.11‰and-0.79‰,respectively.TheδD andδ18 O values in the water of the lake were the lowest,with average values about-32.34‰and-2.05‰,respectively.Specially,the values ofδD andδ18 O of DL1 and DL12 sites near the lake inlet were visibly lower than others sites,which indicates that the input of river water had influenced the value change processes ofδD andδ18 O in the water and ice samples.Vertically,the values ofδD andδ18 O in the ice of 60-70 cm depth were larger than those in surface ice of 0-10 cm depth.Furthermore,theδD andδ18 O values in the water of 0-10 cm depth(or water under lake ice)in summer and winter were higher than those in the water of greater than 700 cm depth.The correlation analysis results showed high positively relationships between the values ofδD andδ18 O with dissolved oxygen,but negatively relativity with the conductivity and total dissolved solid.The water quality indexes had visibly effects on the changes ofδD andδ18 O values.
作者
杜蕾
李畅游
李文宝
史小红
DU Lei;LI Changyou;LI Wenbao;SHI Xiaohong(Water Conservancy and Civil Engineering College,Inner Mongolia Agricultural University,Huhhot 010018,Inner Mongolia Autonomous Region,P.R.China)
出处
《湿地科学》
CSCD
北大核心
2019年第2期215-221,共7页
Wetland Science
基金
国家自然科学基金项目(51469025
51669021和51339002)
内蒙古自治区自然科学基金项目(2016MS0552和2016MS0406)资助
关键词
氢稳定同位素
氧稳定同位素
空间分布
达里诺尔湖
hydrogen stable isotope
oxygen stable isotope
physicochemical index
space distribution
Dalinor Lake
