Hubbard Brook Experimental Forest (USDA Forest Service): Instantaneous Streamflow by Watershed, 1956 - present

Streamflow at 9 watersheds within the Hubbard Brook
Experimental Forest has been measured continuously from as
early as 1955. Streams are gaged with V-notch weirs at the
outlet of each watershed. Height of water behind the weir
increases with increased streamflow and is recorded by means
of a float attached mechanically to a pen on a spring-wound
strip-chart recorder. For each day, 2 to 130 points on the
chart trace are digitized, depending on the rate of change of
flow. Gage heights are converted to streamflow rate by
calibration and conversion factors. There is a discharge
value for every digitized point.
Beginning January 1, 2013, instantaneous streamflow
data are measured by electronic sensors, and data are
provisional as the transition from chart to digital data
collection is still under evaluation. Data may be updated
before they are finalized. Please contact the dataset creator
prior to data use/publication.
These data were gathered as part of the Hubbard Brook
Ecosystem Study (HBES). The HBES is a collaborative effort at
the Hubbard Brook Experimental Forest, which is operated and
maintained by the USDA Forest Service, Northern Research
Station.

哈伯德布鲁克实验森林（Hubbard Brook Experimental Forest）内9个流域的径流监测工作最早始于1955年，迄今已持续开展。每个流域的出水口均安装V形堰（V-notch weir）用于流量监测：堰前水位随径流量增大而升高，通过与弹簧驱动带状纸记录仪笔尖机械连接的浮标记录水位变化。根据流量变化速率的不同，每日需对记录仪图纸上的2至130个轨迹点进行数字化处理。借助校准系数与转换因子，可将实测水位换算为径流速率，每个数字化点均对应一组流量值。
自2013年1月1日起，瞬时径流数据改用电子传感器采集；由于从纸质记录向数字数据采集的过渡仍在评估阶段，当前数据为暂定版本，最终定稿前可能会进行更新。使用或发表该数据前，请先联系数据集创建者。
本数据集隶属于哈伯德布鲁克生态系统研究（Hubbard Brook Ecosystem Study, HBES），该研究是哈伯德布鲁克实验森林的协作项目，由美国农业部林务局（USDA Forest Service）北部研究站（Northern Research Station）运营维护。