Streamflow at 9 watersheds (12-77 Hectares) within the Hubbard Brook Experimental Forest was measured continuously from as early as 1955. Streams were gaged with V-notch weirs and rectangular San Dimas flumes at the outlet of each watershed. Through 2012, stage heights were recorded by means of a float mechanically attached to a pen on a spring-wound strip-chart recorder. Beginning January 1, 2013 the charts were replaced with digital sensors.
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.