Gregory Granato is a hydrologist whose research focuses on developing hydrologic software to provide actionable information for environmental decisionmakers. Gregory has worked with the USGS on projects covering all aspects of hydrology since 1992. Before that time he was an aerospace engineer working on the design of the Space Station's water and waste treatment systems.
Software (currently supported):
Stochastic Empirical Loading and Dilution Model (SELDM) Report on-line Software support page
KTRLine: Kendall-Theil Robust Line Report on-line Software support page
Streamflow data mining and analysis software (GNWISQ, MkPP, SREF, QSTATS, and MkDF) Report on line Software support page
Highway-Runoff Database Report on line Software support page
Hydrologic Drought Decision Support System (HyDroDSS) Report and software on-line
Patents:
Granato, G.E. and Smith, K.P., 2000, Automated Groundwater Monitoring System and Method: Washington D.C., U.S. Government Patent and Trademark Office, United States Patent 6,021,664, 31 p. Available on-line
Smith, K.P. and Granato; G.E., 2005, Automated self-calibrating water quality monitoring sensor housing assembly: Washington D.C., U.S. Government Patent and Trademark Office, United States Patent 6,936,156, 9 p. Available on-line
Publications:
U.S. Geological Survey Techniques and Methods Reports:
Granato, G.E., 2013, Stochastic empirical loading and dilution model (SELDM) version 1.0.0: U.S. Geological Survey Techniques and Methods, book 4, chap. C3, 112 p., CD–ROM. (Also available at .) Report On-Line Note: SELDM is now on version 1.0.1 Please use the new version on the software support page here: Software Support Page
Granato, G.E., 2006, Kendall-Theil Robust Line (KTRLine--version 1.0)—A visual basic program for calculating and graphing robust nonparametric estimates of linear-regression coefficients between two continuous variables: Techniques and Methods of the U.S. Geological Survey, book 4, chap. A7, 31 p. Report On-Line Software On-Line Software Support Page
Kiang, Julie E., Flynn, Kate, Hummel, Paul, Zhai, Tong, and Granato, G.E., 2017, SWToolbox: A Surface Water Toolbox for Statistical Analysis of Streamflow Time Series: U.S. Geological Survey Techniques and Methods, book 4, chap. A11
Journal Articles:
Jeznach, L.C., and Granato, G.E., 2020, Comparison of SELDM simulated total-phosphorus concentrations with ecological impervious-area criteria: Journal of Environmental Engineering: v. 146, No. 8, 10 p. https://doi.org/10.1061/(ASCE)EE.1943-7870.0001763
Granato, G.E., and Jones, S.C., 2019, Simulating runoff quality with the Highway Runoff Database and the Stochastic Empirical Loading and Dilution Model: Transportation Research Record, Journal of the Transportation Research Board, 7 p. https://doi.org/10.1177/0361198118822821
Stonewall, A.J., Granato, G.E., and Haluska, T.L., 2018, Assessing roadway contributions to stormwater flows, concentrations and loads by using the StreamStats application: Transportation Research Record, Journal of the Transportation Research Board, 9 p. https://doi.org/10.1177/0361198118758679
Granato, G.E., and Jones, S.C., 2017, Estimating Total Maximum Daily Loads with the Stochastic Empirical Loading and Dilution Model: Transportation Research Record, Journal of the Transportation Research Board, No. 2638, p. 104-112. https://doi.org/10.3141/2638-12
Granato, G.E., and Jones, S.C., 2014, Stochastic Empirical Loading and Dilution Model for analysis of flows, concentrations, and loads of highway runoff constituents: Transportation Research Record, Journal of the Transportation Research Board, No. 2436, p. 139-147. http://doi.org/10.3141/2436-14
Eng, K., Kiang, J.E., Chen, Y.-Y., Carlisle, D.M. and Granato, G.E., 2011, Causes of systematic over- or underestimation of low streamflows by use of index-streamgage approaches in the United States: Hydrological Processes, v. 25, pp. 2211–2220 http://dx.doi.org/10.1002/hyp.7976
Granato, G.E., and Smith, K.P., 1999, Robowell: An automated process for monitoring groundwater quality using established sampling protocols. Groundwater Monitoring and Remediation, v. 19, no. 4, p. 81-89. http://dx.doi.org/10.1111/j.1745-6592.1999.tb00243.x
Granato, G.E., 1996, Deicing chemicals as a source of constituents in highway runoff. Transportation Research Record 1533, Transportation Research Board, National Research Council, Washington D.C., p. 50-58. https://doi.org/10.3141/1533-08
Church, P.E., and Granato, G.E., 1996, Bias in groundwater data caused by well-bore flow in long-screen wells: Groundwater, Vol. 34, No. 2, p. 262-273. http://dx.doi.org/10.1111/j.1745-6584.1996.tb01886.x
Granato, G.E., Church, P.E., and Stone V.J., 1995, Mobilization of Major and Trace Constituents of Highway Runoff in Groundwater Potentially Caused by Deicing-Chemical Migration, Transportation Research Record 1483, Transportation Research Board, National Research Council, Washington D.C., p. 92-104.
and 44 other USGS Publications (Scholar) (USGS Pubs warehouse)...
USGS National Training Center Classes:
H1843 - Stormwater Runoff Quality Analysis with the Stochastic Empirical Loading and Dilution Model Developed and taught this class in MA(2013), DC(2014), OR (2014), CO (2015), TX (2016), CA(2017), NV (2017), OR (2018), Online (2020).
National Webinars:
National Academies of Sciences, Engineering, and Medicine; Transportation Research Board Approaches for Determining and Complying with TMDL Requirements Related to Roadway Stormwater Runoff
Water Research Foundation Integrated Stormwater Management for Highway and Transportation Sector (2017)
National Academies of Sciences, Engineering, and Medicine; Transportation Research Board Use and Implementation of the Federal Highway Administration Stochastic Empirical Loading and Dilution Model (SELDM): Oregon and Massachusetts
Other research activities:
National Academies of Sciences, Engineering, and Medicine; Transportation Research Board Standing Committees
AKD50 Standing Committee on Hydrology, Hydraulics and Stormwater
AFB 60 Standing Committee on Hydrology, Hydraulics and Water Quality, Full Member
AFB 65 Standing Committee on Stormwater, Full Member
National Academies of Sciences, Engineering, and Medicine; National Cooperative Highway Research Program Research Panels
Project NCHRP 25-25 Research for the AASHTO Committee on Environment and Sustainability, Task 119 and 120 Enhancing the International Stormwater BMP Database to Serve as a Highway Specific BMP Database
Project NCHRP 25-31 Guidelines for Evaluating and Selecting Modifications to Existing Roadway Drainage Infrastructure to Improve Water Quality in Ultra-Urban Areas
Project NCHRP 25-32 Measuring and Removing Dissolved Metals from Storm Water in Highly Urbanized Areas
Project NCHRP 25-40 Long-Term Performance and Life-Cycle Costs of Stormwater Best Management Practices
Project NCHRP 25-53 Approaches for Determining and Complying with TMDL Requirements Related to Roadway Stormwater Runoff
American Society of Civil Engineers Outstanding Reviewer Prize: Reston, 2015 (Journal of Environmental Engineering)
A nationwide study to better define triangular-hydrograph statistics for use with runoff-quality and flood-flow studies was done by the U.S. Geological Survey (USGS) in cooperation with the Federal Highway Administration. Although the triangular hydrograph is a simple linear approximation, the cumulative distribution of stormflow with a triangular...
Granato, Gregory E.
The U.S. Geological Survey (USGS), in cooperation with U.S. Department of Transportation Federal Highway Administration and the Massachusetts Department of Transportation, conducted a field study from September 2005 through September 2007 to characterize the quality of highway runoff for a wide range of constituents. The highways studied had...
Smith, Kirk P.; Granato, Gregory E.
This report documents methods for data compilation and analysis of statistics for stormflows that meet data-quality objectives for order-of-magnitude planning-level water-quality estimates at unmonitored sites in the conterminous United States. Statistics for prestorm streamflow, precipitation, and runoff coefficients are used to model stormflows...
Granato, Gregory E.
Streamflow information is important for many planning and design activities including water-supply analysis, habitat protection, bridge and culvert design, calibration of surface and ground-water models, and water-quality assessments. Streamflow information is especially critical for water-quality assessments (Warn and Brew, 1980; Di Toro, 1984;...
Granato, Gregory E.
The Pawcatuck River Basin in southwestern Rhode Island and southeastern Connecticut is an important high-quality water resource for domestic and public supplies, irrigation, recreation, and the aquatic ecosystem. Concerns about the effects of water withdrawals on aquatic habitat in the basin have prompted local, State, and Federal agencies to...
Breault, Robert F.; Zarriello, Phillip J.; Bent, Gardner C.; Masterson, John P.; Granato, Gregory E.; Scherer, J. Eric; Crawley, Kathleen M. 
The Kendall-Theil Robust Line software (KTRLine-version 1.0) is a Visual Basic program that may be used with the Microsoft Windows operating system to calculate parameters for robust, nonparametric estimates of linear-regression coefficients between two continuous variables. The KTRLine software was developed by the U.S. Geological Survey, in...
Granato, Gregory E. Transient numerical ground-water-flow simulation and optimization techniques were used to evaluate potential effects of instream-flow criteria and water-supply demands on ground-water development options and resultant streamflow depletions in the Big River Area, Rhode Island. The 35.7 square-mile (mi2) study area includes three river basins, the...
Granato, Gregory E.; Barlow, Paul M. In Rhode Island, the availability of water of sufficient quality and quantity to meet current and future environmental and economic needs is vital to life and the State's economy. Water suppliers, the Rhode Island Water Resources Board (RIWRB), and other State agencies responsible for water resources in Rhode Island need information about...
Granato, Gregory E. The Rhode Island Water Resources Board is considering expanded use of ground-water resources from the Big River area because increasing water demands in Rhode Island may exceed the capacity of current sources. This report describes the hydrology of the area and numerical simulation models that were used to examine effects of ground-water...
Granato, Gregory E.; Barlow, Paul M.; Dickerman, David C.
No abstract available.
Granato, Gregory E.; Smith, Kirk P.