East River Watershed Stable Water Isotope Data in Precipitation, Snowpack and Snowmelt 2016-2020

Stable water isotopes (d18O, d2H and d-excess) are important tracers in hydrologic research to understand water partitioning between vegetation, groundwater, and runoff but are rarely applied to large watersheds with persistent snowpack and complex topopgraphy. Data were collected for the Lawrence Berkeley National Laboratory Watershed Function Science Focus Area supported by the U.S Department of Energy in the East River, CO Hydrologic Unit Code (140200010) with limited data also collected in adjacent watersheds Ohio Creek and Taylor River. Data are provided in csv and includes isotopic information for precipitation (years 2014-2016), snowmelt (years 2016-2017) and snowpits (years 2016-2020). Snowpit data contain depth resolved information at 10 cm intervals for density, snow water equivalent (SWE) and stable water isotopes. Bulk isotopic data for 86 snowpits contain depth, SWE, density and SWE-weighted isotope values. Sampling locations and elevations are provided within the data files, while kmz files are provided to view sampling locations using Google Earth software.

稳定水同位素（stable water isotopes，包含d18O、d2H与氘盈余d-excess）是水文研究中用于厘清植被、地下水与径流间水分分配关系的关键示踪剂，但针对存在永久性积雪与复杂地形的大型流域，该类示踪剂的应用仍较为匮乏。本数据集采集自美国能源部（U.S. Department of Energy）资助的劳伦斯伯克利国家实验室流域功能科学重点研究区，该区域位于科罗拉多州东河流域（水文单元代码140200010）；同时在相邻的俄亥俄溪（Ohio Creek）与泰勒河（Taylor River）流域也采集了少量补充数据。数据集以CSV格式存储，涵盖降水（2014-2016年）、融雪（2016-2017年）以及雪坑（2016-2020年）的同位素观测数据。雪坑数据按每10厘米间隔提供垂直分层信息，包含密度、雪水当量（Snow Water Equivalent, SWE）与稳定水同位素指标；86个雪坑的整合同位素数据则包含深度、SWE、密度以及经SWE加权的同位素数值。数据文件中附带采样点位与海拔信息，同时提供KMZ格式文件，可通过谷歌地球（Google Earth）软件查看采样点位分布。