Scientific Investigations Report 2014–5192
Monthly water yields from 105,829 catchments and corresponding flows in 107,691 stream segments were estimated for water years 1951–2012 in the Great Lakes Basin in the United States. Both sets of estimates were computed by using the Analysis of Flows In Networks of CHannels (AFINCH) application within the NHDPlus geospatial data framework. AFINCH provides an environment to develop constrained regression models to integrate monthly streamflow and water-use data with monthly climatic data and fixed basin characteristics data available within NHDPlus or supplied by the user. For this study, the U.S. Great Lakes Basin was partitioned into seven study areas by grouping selected hydrologic subregions and adjoining cataloguing units. This report documents the regression models and data used to estimate monthly water yields and flows in each study area. Estimates of monthly water yields and flows are presented in a Web-based mapper application. Monthly flow time series for individual stream segments can be retrieved from the Web application and used to approximate monthly flow-duration characteristics and to identify possible trends.
First posted April 28, 2015
Part or all of this report is presented in Portable Document Format (PDF). For best results viewing and printing PDF documents, it is recommended that you download the documents to your computer and open them with Adobe Reader. PDF documents opened from your browser may not display or print as intended. Download the latest version of Adobe Reader, free of charge. More information about viewing, downloading, and printing report files can be found here.
Luukkonen, C.L., Holtschlag, D.J., Reeves, H.W., Hoard, C.J., and Fuller, L.M., 2015, Estimation of monthly water yields and flows for 1951–2012 for the United States portion of the Great Lakes Basin with AFINCH: U.S. Geological Survey Scientific Investigations Report 2014–5192, 83 p., http://dx.doi.org/10.3133/sir20145192.
Purpose and Scope
Description of the Great Lakes Basin
Data Integration within AFINCH and NHDPlus
Methods of Flow and Water-Yield Estimation for Study Areas