Hydrologic Monitoring at the Jack and Laura Dangermond Preserve

Isotope samples were taken at 32 groundwater wells across the Jack and Laura Dangermond preserve. Well water was pumped from wells until electrical conductivity and temperature stabilized, then water was collected and labeled in HDPE sample bottles (after filtration for carbon isotope samples). Stream isotope samples were collected at Escondido Stream either by a grab sample or by an isco 6700 sampler. The isco sampling device is contained in a metal box and the bottles were filled with 2 mm of mineral oil to limit evaporation from occurring before the samples were collected. Isco samples were collected at least every 24 days. Rainfall samples were either collected as a grab sample or with the automated rainfall sampler. The automated rainfall sampler is engineered with a rachio irrigation system and an array of 16 solenoid valves which drain into a different sealed 5 gallon bucket each day. Hydrogen and oxygen isotope analysis was completed at the UC Davis Stable Isotope Facility https://stableisotopefacility.ucdavis.edu/analytical-services. Tritium analysis was completed by the USGS Isotope Tracer Project https://water.usgs.gov/nrp/isotope-tracers/index.html. Carbon isotope analysis was completed by the University of Arizona AMS laboratory https://ams.arizona.edu/. Stream temperature and specific conductivity (measured via an in-situ aqua troll 600) were recorded at varying intervals with the goal of capturing at least 1 data point per hour from November 2020 - May 2023; there is a gap between March 2021 and October 2021. The In-situ aqua troll 600 is located in Escondido stream at Jalama road at the entrance of a culvert. The data available here are the result of collective efforts from many members of this laboratory over multiple years. This material is based on work supported by the National Science Foundation under grant no. EAR-2048227. This research was supported by funding from the Zegar Family Foundation. S.J. acknowledges the Jack and Laura Dangermond Preserve (https://doi.org/10.25497/D7159W), the Point Conception Institute and the Nature Conservancy for their support of this research.

本研究在杰克与劳拉·丹杰蒙德保护区（Jack and Laura Dangermond Preserve）内的32口地下水井采集同位素样品。先将井内水泵出至电导率与温度均趋于稳定后，再收集水样并装入高密度聚乙烯（HDPE）样品瓶（碳同位素样品需预先完成过滤处理）。埃斯孔迪多溪（Escondido Stream）的溪流同位素样品可通过瞬时采样或ISCO 6700型采样器采集；该ISCO采样装置封装于金属箱内，采样瓶中预先注入2 mm厚度的矿物油，以防止样品在采集前发生蒸发，且ISCO采样的间隔至少为每24天一次。降雨样品可通过瞬时采样或自动化降雨采样器采集，该自动化采样器配备Rachio灌溉系统与16个电磁阀阵列，每日将收集的水样排入不同的密封5加仑桶中。氢、氧同位素分析由加州大学戴维斯分校稳定同位素实验室（UC Davis Stable Isotope Facility）完成，分析网址为https://stableisotopefacility.ucdavis.edu/analytical-services；氚分析由美国地质调查局（USGS）同位素示踪项目完成，分析网址为https://water.usgs.gov/nrp/isotope-tracers/index.html；碳同位素分析由亚利桑那大学加速器质谱（AMS）实验室完成，分析网址为https://ams.arizona.edu/。溪流温度与比电导率通过原位Aqua Troll 600型设备测量，于2020年11月至2023年5月期间以至少每小时1个数据点的目标频率进行间隔式记录，2021年3月至2021年10月期间存在数据缺失；该原位Aqua Troll 600设备部署于贾拉马路（Jalama Road）涵洞入口处的埃斯孔迪多溪中。本数据集为本实验室多名成员多年共同工作的成果。本研究工作得到美国国家科学基金会（National Science Foundation）资助，项目编号为EAR-2048227，并获得泽加尔家族基金会（Zegar Family Foundation）的经费支持。S.J. 感谢杰克与劳拉·丹杰蒙德保护区（https://doi.org/10.25497/D7159W）、康塞普申角学院（Point Conception Institute）以及大自然保护协会对本研究的支持。