Federal sampler data for Black Sand experimental plots, 2018

This project is part of the Black Sand experiment to monitor effects of early snowmelt at Niwot Ridge. At each of five sites (Lefty, Soddie, Trough, East Knoll and Audubon) two 2x2 m plots were set up and two 3x3m plots were set up, with one of each size plot receiving 600 g/m2 black sand and one receiving 800 g/m2 of black sand. This portion of the black sand experiment was to look at snow depth and SWE using a federal sampler at each of the plots in 2018. We use an aluminum Standard Federal Snow Sampler to measure snow depth and snow water equivalent (SWE). This device, compared to traditional snow pit techniques, provides efficient measurement capabilities that are less disruptive to the snowpack. Manual Federal Sampler measurements provide high accuracy point data to determine the amount of water in the surrounding snowpack. With a high downstream reliance on water within the regional snowpack, our weekly measurements give a time series of SWE throughout the winter season, offering consistent and dependable information for water resource planning and preparation.

本项目隶属于黑沙实验（Black Sand experiment），旨在监测尼沃特岭（Niwot Ridge）的早期融雪效应。在莱夫蒂（Lefty）、索迪（Soddie）、特劳夫（Trough）、东诺尔（East Knoll）与奥杜邦（Audubon）共5个样地中，各布设2块2×2米样方与2块3×3米样方；两类规格样方各有1块施加600 g/m²黑沙，剩余1块施加800 g/m²黑沙。本次黑沙实验的该子项旨在2018年，通过联邦采样器（federal sampler）测定各块样地的雪深与雪水当量（snow water equivalent，SWE）。我们采用铝制标准联邦雪采样器（Standard Federal Snow Sampler）开展雪深与雪水当量测量工作。相较于传统雪坑测量技术，该设备具备高效的测量能力，且对积雪层的破坏性更低。手动联邦采样器可采集高精度的点位数据，用于评估周边积雪层的含水量。鉴于该区域积雪的下游水资源依赖度极高，我们的每周观测可获取整个冬季的雪水当量时间序列数据，为水资源规划与筹备工作提供稳定可靠的参考依据。