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Datasets and scripts used for estimating streamflow and base flow within the nontidal Chesapeake Bay riverine system, water years 2006-15


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Buffington, P.C., Capel, P.D., and Hopple, J.A., 2020, Datasets and scripts used for estimating streamflow and base flow within the nontidal Chesapeake Bay riverine system, water years 2006-15: U.S. Geological Survey data release,


This U.S. Geological Survey (USGS) data release contains estimated daily streamflow and base flow for HUC12 in the nontidal areas of the Chesapeake Bay watershed, monthly average streamflow and base flow, flow statistics, MATLAB scripts, and a document that describes how to create similar datasets in other watersheds. Daily streamflow was estimated for all the nontidal parts of the Chesapeake Bay watershed with the program "Unit Flows in Networks of Channels" (UFINCH; Holtschlag, 2016), together with the observations of measured streamflow at gages at the downstream ends of major rivers. The estimated streamflow was aggregated at the HUC12 level and reformatted as an Optimal Hydrograph Separation (OHS) input file using MATLAB scripts. [...]


Point of Contact :
Matthew P Miller
Originator :
Patrick C Buffington, Paul D Capel, Jessica A Hopple
Metadata Contact :
Jessica A Hopple
Publisher :
U.S. Geological Survey
Distributor :
U.S. Geological Survey - ScienceBase
SDC Data Owner :
Office of Planning and Programming
USGS Mission Area :
Water Resources

Attached Files

Click on title to download individual files attached to this item.
“Daily-flow values for non-tidal HUC12s in the Chesapeake Bay watershed”
50.93 MB application/zip
“Monthly-average flow, base flow, and base-flow index values”
11.32 MB text/plain
“Daily-flow, monthly-average flow, and flow statistics”
265.63 KB text/plain
“MATLAB functions”
2.27 KB application/zip
“Instructions on how to run the MATLAB scripts”
144.88 KB application/pdf


The purpose of this study was to use the "Unit Flows in Networks of Channels" (UFINCH) computer application (Holtschlag, 2016), together with the measured daily streamflow at streamgages on the selected rivers, to estimate streamflow in all the streams of the study area. The nontidal area part of the Chesapeake Bay watershed was chosen as the example for applying these modeling tools. The estimated daily streamflow was then used to estimate base flows and base-flow indices for all streams in the watershed. Two common methods for hydrograph separation were used to calculate daily base flow: Base Flow Index and Eckhardt - Collischonn/Fan.

Additional Information


Type Scheme Key
DOI doi:10.5066/P906K5GZ

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