基于稳定同位素的策勒河流域山区河流蒸发损失估算  

Estimation of river evaporation loss in the Cele River Basin based on stable isotopes

作　　者：吕雯改 刘云飞 殷昌军 桂东伟[1,2,3] 王鹏 Lü Wengai;LIU Yunfei;YIN Changjun;GUI Dongwei;WANG Peng(State Key Laboratory of Desert and Oasis Ecology,Xinjiang Institute of Ecology and Geography,Chinese Academy of Sciences,Urumqi 830011,China;Cele National Station of Observation&Research for Desert Grassland Ecosystem in Xinjiang,Cele 848300,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院新疆生态与地理研究所荒漠与绿洲生态国家重点实验室,新疆乌鲁木齐830011 [2]新疆策勒荒漠草地生态系统国家野外科学观测研究站,新疆策勒848300 [3]中国科学院大学,北京100049

出　　处：《水资源与水工程学报》2022年第6期62-68,76,共8页Journal of Water Resources and Water Engineering

基　　金：国家自然科学基金项目(42171042);国家基础资源调查专项(2019FY100205)。

摘　　要：为探究昆仑山北坡山区流域水体蒸发损失垂直变化情况,基于2016年5-12月昆仑山北坡中段策勒河流域不同水体同位素数据,运用蒸发富集模型和稳定同位素(^(18)O和^(2)H)方法,研究了流域内不同水体的同位素时空变化特征,分析了策勒河流域的补给来源,并根据蒸发富集模型估算了流域内不同海拔地区同位素的蒸发损失。结果表明:流域内不同水体同位素的特征呈高山区贫化、荒漠区富集的趋势;策勒河河水与地下水存在密切的水力联系;策勒河流域在不同海拔的平均蒸发损失:高山区为24.99%、中山区为29.04%、荒漠区为35.00%。研究结果对理解区域水平衡及其对山区生态系统气候变化的响应具有重要意义。In order to explore the vertical variation of water evaporation losses in the river basin of the northern slope of Kunlun Mountains,the evaporation enrichment model and stable isotope(^(18)O and ^(2)H)methods were used to analyze the isotope data of different water bodies in the Cele River Basin from May to December,2016.The temporal and spatial variation characteristics of isotopes in different water bodies was studied,the recharge sources of the basin was analyzed,and the evaporation losses of isotopes in different altitude areas were estimated using the evaporation enrichment model.The results showed that the isotope characteristics of different water bodies in the basin showed a pattern of dilution in the high mountainous area but enrichment in the desert area.There was a close hydraulic connection between the of Cele River water and groundwater;the average evaporation loss of the Cele River Basin at different altitudes was 24.99%in the high mountainous area,29.04%in the middle mountainous area and 35.00%in the desert area.The results are of great significance for understanding regional water balance and its response to climate change in mountain ecosystems.

关 键 词：河流蒸发损失 稳定同位素 蒸发富集模型 策勒河流域 

分 类 号：P426.2[天文地球—大气科学及气象学]