Water temperature and conductivity, Dinwooody Creek glacial watershed, Wind River Range, Wyoming, summer 2018

To investigate glacial controls on water chemistry, we instrumented 13 sites in the Dinwoody Creek watershed (Wind River Range, Wyoming) to monitor conductivity and water temperature during the 2018 summer melt season (late June through late September). The primary sites were located along a longitudinal gradient along Dinwoody Creek (labeled Din-1 through Din-7) starting near the toe of Dinwoody Glacier. Additional sites were selected to capture tributary streams draining glacial, non-glacial, and lake-dominated subwatersheds. At each site, we deployed a HOBO U24 low-range conductivity logger protected by PVC housing with 0.5 cm holes to allow water flow. We recovered water temperature data from all 13 loggers and conductivity data from 8 loggers. An air temperature logger was placed near Din-4 to compare with water temperature measurements. All loggers recorded measurements at 15-min or 60-min intervals. To check the accuracy of the conductivity loggers, we measured conductivity with a YSI ProDSS probe at each stream site when loggers were deployed and retrieved, with similar values (within a few µS/cm) across instruments. Conductivity measurements from the HOBO loggers were converted to specific conductance at 25oC using the “low range” data and temperature compensation method for freshwater lakes and streams options in the HOBOware conductivity assistant. Specifics of logger locations, deployment dates, and sample type are provided in on the first tab of the data sheet.

为探究冰川作用对水化学的调控效应，我们在怀俄明州风河山脉的丁伍迪溪流域布设了13个监测点位，于2018年夏季融冰季（6月末至9月末）期间开展电导率与水温监测。核心监测点位沿丁伍迪溪纵向梯度布设（编号Din-1至Din-7），起点紧邻丁伍迪冰川末端。其余点位则覆盖冰川补给、非冰川补给及以湖泊为主的各类子流域的支流，以完整捕获不同水文背景下的水体特征。每个点位均部署了HOBO U24低量程电导率记录仪，设备外包裹带有0.5cm透水孔的PVC外壳以保障稳定运行。本次研究成功获取全部13台记录仪的水温数据，以及其中8台的电导率监测数据。我们在Din-4点位附近额外布设了一台气温记录仪，用于辅助开展水温对比分析。所有记录仪的采样间隔为15分钟或60分钟。为验证电导率记录仪的测量精度，我们在部署与回收记录仪时，均使用YSI ProDSS型探头对各溪流点位的电导率进行现场标定，两台设备的测量值偏差仅为数微西门子每厘米（µS/cm）。依托HOBOware电导率助手的淡水湖泊与溪流"低量程"数据及温度补偿模块，我们将HOBO记录仪获取的原始电导率数据换算为25℃下的比电导率（specific conductance）。监测点位详情、布设日期与样品类型等信息，详见数据表的首个工作表。