Estimated Baseflow for Streams Containing Endangered Atlantic Salmon in Maine, USA

The U.S. Geological Survey (USGS) developed a regression model for estimating mean August baseflow per unit of drainage area in cooperation with National Oceanic and Atmospheric Administration (NOAA) in order to help resource managers assess relative amounts of baseflow in streams with Maine Atlantic Salmon habitat (Lombard and others, 2021). This page provides links to two Data Releases that include the data used to compute this model and an application of the model presented as a spatial coverage for the state of Maine south of 46º 21′55″ N latitude.   

The first data release (Lombard and Sturtevant, 2021) includes the excel file ‘Data_Tables.xlsx,’ consisting of three tables of data used in the development of the regression model. That data release also includes child pages that contain data for average July precipitation in Maine and estimated boundaries of sand and gravel aquifers in Maine. 

The second data release (Sturtevant and others, 2022) includes the spatial coverage of model-estimated mean August baseflow per square mile of drainage area published as a shapefile and Web Map Service (WMS) layer. The WMS layer is also hosted as a state map layer on the StreamStats web application for Maine.  The regression model for estimating August mean baseflow per unit of drainage area was applied to each reach of a stream network derived from select National Hydrography Dataset Plus High-Resolution (NHDPlusHR) data in the State of Maine south of 46º 21′55″ N latitude. The spatial coverage developed from the stream network contains model-estimated mean August baseflow per square mile of drainage area as an attribute of each NHDPlusHR reach.