The Delaware River Basin Streamflow Estimator Tool (DRB-SET)

Release Date:


The Delaware River Basin Streamflow Estimator Tool (DRB-SET) estimates baseline (minimally altered) and altered (affected by regulation, diversion, mining, or other anthropogenic activities) streamflow at a daily time step for ungaged stream locations in the Delaware River Basin for water years 1960-2010. The ability to characterize baseline streamflow conditions, compare them with current conditions, and assess effects of human activities on streamflow is fundamental to water-management programs addressing water allocation, human-health issues, recreation needs, and establishment of ecological flow criteria.

What is it?

BaSE is a Windows based application built using the .net 4.0 framework that can:

  • Estimate baseline and altered daily mean streamflow for ungaged streams in the Delaware River Basin for the period 1960 to 2010
  • Generate a text file of daily mean streamflow for the ungaged site under baseline and altered conditions
  • Create report files that include baseline and altered streamflow data, exceedance probabilities, basin characteristics, hydrographs, and water use for the ungaged site


This software has been approved for release by the U.S. Geological Survey (USGS). Although the software has been subjected to rigorous review, the USGS reserves the right to update the software as needed pursuant to further analysis and review. No warranty, expressed or implied, is made by the USGS or the U.S. Government as to the functionality of the software and related material nor shall the fact of release constitute any such warranty. Furthermore, the software is released on condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from its authorized or unauthorized use.

Streamgage basin characteristics (Appendix 2 from USGS Report SIR 2015-5157)

Streamgage flow duration exceedance probability discharges (Appendix 3 from USGS Report SIR 2015-5157)

References and Data Links

Stuckey, M.H., 2016, Estimation of daily mean streamflow for ungaged stream locations in the Delaware River Basin, water years 1960-2010: U.S. Geological Survey Scientific Investigations Report 2015-5157, 42 p.

Stuckey, M.H., and Ulrich, J.E., 2016, User's Guide for the Delaware River Basin Streamflow Estimator Tool (DRB-SET): U.S. Geological Survey Open-File Report 2015-1192, 6 p.,

Notice 2/14/2018

Basin characteristics must be manually entered under tab 2. StreamStats functionality under tab 1 and StreamStats web services under tab 2 are not currently working.