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 attached mechanically 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 by the Hubbard Brook Experimental Forest and contributed to 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.