StreamStats for Pennsylvania was developed in cooperation with the Pennsylvania Department of Environmental Protection, the Federal Emergency Management Agency, the Pennsylvania State Association of Township Supervisors, the Pennsylvania Department of Transportation and the Susquehanna River Basin Commission.
Pennsylvania StreamStats incorporates regression equations for estimating numerous streamflow statistics. Equations are included for estimating flood flows associated with the 2-, 5-, 10-, 25-, 50-, 100-, 200-, and 500-year recurrence interval floods, which have the probability of exceedance in any single year of 50, 20, 10, 4, 2, 1, 0.5, and 0.2 percent, respectively. Equations are included for estimating the 7-day, 10-year; 7-day, 2-year; 30-day, 10-year; 30-day, 2-year; and the 90-day, 10-year low flows, the 10-year, 25-year, and 50-year base flows, and the harmonic mean flow, and the mean annual flow. Equations also are provided for estimating bankfull discharge and channel geometry. Water use data is also available in Pennsylvania and can be retrieved after a basin delineation is completed by clicking the "Check For Water Use" button. The reports below document the regression equations available in StreamStats for Pennsylvania, the methods used to develop the equations and to measure the basin characteristics used in the equations, references to GIS data layers used in the analysis, and the errors associated with the estimates obtained from the equations. Users should familiarize themselves with these reports before using StreamStats to obtain estimates of streamflow statistics for ungaged sites.
- Roland, M.A., and Stuckey, M.H., 2019, Development of regression equations for the estimation of flood flows at ungaged streams in Pennsylvania: U.S. Geological Survey Scientific Investigations Report 2019–5094, 36 p., https://doi.org/10.3133/sir20195094. [Supersedes USGS Scientific Investigations Report 2008–5102]
- Stuckey, M.H., 2006, Low-flow, base-flow, and mean-flow regression equations for Pennsylvania streams: U.S. Geological Survey Scientific Investigations Report 2006-5130, 84 p.
- Clune, J.W., Chaplin, J.J., and White, K.E., 2018, Comparison of regression relations of bankfull discharge and channel geometry for the glaciated and nonglaciated settings of Pennsylvania and southern New York: U.S. Geological Survey Scientific Investigations Report 2018–5066, 20 p., https://doi.org/10.3133/sir20185066.
Underlying StreamStats application datasets were updated for Pennsylvania in 2020, to include the use of updated National Hydrography Dataset (NHD) flowlines and Watershed Boundary Dataset (WBD) boundaries. GIS datasets are available in the Data Releases below.
- Hoffman, S.A., 2020, Data in support of Pennsylvania StreamStats upgrade to the basin delineation database: U.S. Geological Survey data release, https://doi.org/10.5066/P9ET243Q
- Kolb, K.R., Steeves, P.A., and Hoffman, S.A., 2020, Basin Characteristics Rasters for Pennsylvania StreamStats 2020: U.S. Geological Survey data release, https://doi.org/10.5066/P9M47KLH.
- Roland, M.A., Stuckey, M.H., and Gross, E.L. 2019, Data in Support of Development of Regression Equations for the Estimation of Flood Flows at Ungaged Streams in Pennsylvania (ver. 2.0, August 2020): U.S. Geological Survey data release, https://doi.org/10.5066/P9YHIU6G
Click on this link to obtain general information on the Pennsylvania application, as well as specific sources and computation methods for basin characteristics.
Notes:
- Mean basin slope is used in the regression equation for low-flow region 1 and flood-flow region 5. For the low-flow regression equation equations, an adjustment factor is applied to the basin characteristic mean basin slope to more accurately replicate the values used to develop the regression equations. Both the raw (unadjusted, BSLOPDRAW) and adjusted basin slope values (BSLOPD) can be displayed using the BasinChars tool, however, only the adjusted value is displayed on the FlowStats form if the ungaged site of interest is within low-flow region 1. For the flood-flow regression equations, an unadjusted basin slope is displayed (BSLOPDRPA20), which was derived from a slightly different source.
- The water use data is compiled from statewide self-monitoring water use reports submitted electronically to the Pennsylvania Department of Environment Protection (PADEP). To obtain site-specific water use data, access PADEP’s Water Use Report Viewer or PADEP’s eDMR Report Viewer for water discharge (return) data
Related Content
Data in support of Pennsylvania StreamStats upgrade to the basin delineation database
Basin Characteristics Rasters for Pennsylvania StreamStats 2020
Data in Support of Development of Regression Equations for the Estimation of Flood Flows at Ungaged Streams in Pennsylvania (ver. 2.0, August 2020)
Roland, M.A., Stuckey, M.H., and Gross, E.L. 2019, Data in Support of Development of Regression Equations for the Estimation of Flood Flows at Ungaged Streams in Pennsylvania (ver. 2.0, August 2020): U.S. Geological Survey data release, https://doi.org/10.5066/P9YHIU6G.
Development of regression equations for the estimation of flood flows at ungaged streams in Pennsylvania
Comparison of regression relations of bankfull discharge and channel geometry for the glaciated and nonglaciated settings of Pennsylvania and southern New York
Low-flow, base-flow, and mean-flow regression equations for Pennsylvania streams
Related Content
- Data
Data in support of Pennsylvania StreamStats upgrade to the basin delineation database
In cooperation with the Federal Emergency Management Agency, Pennsylvania Department of Environmental Protection, Pennsylvania Department of Transportation, and Susquehanna River Basin Commission, the U.S. Geological Survey (USGS) has compiled a series of GIS datasets for Pennsylvania to be implemented into the USGS StreamStats application. These data were compiled from the high definition NationaBasin Characteristics Rasters for Pennsylvania StreamStats 2020
In cooperation with the Federal Emergency Management Agency, the Pennsylvania Department of Transportation, the Pennsylvania Department of Environmental Protection, and the Susquehanna River Basin Commission, the U.S. Geological Survey (USGS) calculated over 20 different basin characteristics as part of preparing the Pennsylvania StreamStats 2020 application. These datasets are raster representatiData in Support of Development of Regression Equations for the Estimation of Flood Flows at Ungaged Streams in Pennsylvania (ver. 2.0, August 2020)
Roland, M.A., Stuckey, M.H., and Gross, E.L. 2019, Data in Support of Development of Regression Equations for the Estimation of Flood Flows at Ungaged Streams in Pennsylvania (ver. 2.0, August 2020): U.S. Geological Survey data release, https://doi.org/10.5066/P9YHIU6G.
- Publications
Development of regression equations for the estimation of flood flows at ungaged streams in Pennsylvania
Regression equations, which may be used to estimate flood flows at select annual exceedance probabilities, were developed for ungaged streams in Pennsylvania. The equations were developed using annual peak flow data through water year 2015 and basin characteristics for 285 streamflow gaging stations across Pennsylvania and surrounding states. The streamgages included active and discontinued continComparison of regression relations of bankfull discharge and channel geometry for the glaciated and nonglaciated settings of Pennsylvania and southern New York
Streambank erosion in areas of past glacial deposition has been shown to be a dominant source of sediment to streams. Water resource managers are faced with the challenge of developing long and short term (emergency) stream restoration efforts that rely on the most suitable channel geometry for project design. A geomorphic dataset of new (2016, n=5) and previous (1999–2006, n=96) estimates of bankLow-flow, base-flow, and mean-flow regression equations for Pennsylvania streams
Low-flow, base-flow, and mean-flow characteristics are an important part of assessing water resources in a watershed. These streamflow characteristics can be used by watershed planners and regulators to determine water availability, water-use allocations, assimilative capacities of streams, and aquatic-habitat needs. Streamflow characteristics are commonly predicted by use of regression equations - Partners