This site is dedicated to Coding and Statistical Data that is produced and analyzed by scientists at the MD-DE-DC WSC. We use many tools at the USGS including software exclusively developed for, sometimes written by the USGS.
Wastewater Nutrient Data Preps, Estimates using PSLoadEsT

The Point-Source Load Estimation Tool (PSLoadEsT) provides a user-friendly interface for generating reproducible load calculations for point source dischargers while managing common data challenges. This report serves as a detailed user's guide.
Bank‐derived material tops fluvial sediment in suburban watershed

Excess fine sediment is a leading cause of ecological degradation within the Chesapeake Bay watershed. To effectively target sediment mitigation measures, it is necessary to identify and quantify the delivery of sediment sources to local waterbodies.
What the MD-DE-DC WSC is capable of doing within the realms Coding and Statistical Data...
Important things happening related to Coding and Statistical Data:
11 May 2020 Introduction to the dataRetrieval package
The dataRetrieval package was created to simplify the process of loading hydrologic data into the R environment. It is designed to retrieve the major data types of U.S. Geological Survey (USGS) hydrologic data that are available on the Web, as well as data from the Water Quality Portal (WQP), which currently houses water quality data from the Environmental Protection Agency (EPA), U.S. Department of Agriculture (USDA), and USGS. Direct USGS data is obtained from a service called the National Water Information System (NWIS).
Statistics Web Service
Here is a sample of our exclusive USGS-based software:
- GNWISQ (Windows) Version 1.1, 2014/09/15
Obtaining and analyzing daily mean streamflow data from the U.S. Geological Survey National Water Information System Web Site: Get National Water Information System Streamflow (Q) files - HydroClimATe (WIN) Version 1.0.0, 2014/03/07
Computer program for assessing the relations among variable climatic and hydrologic time-series data - HyDroDSS (Windows) Version 1.0.0.0, 2014/03/27
Hydrologic Drought Decision Support System - JUPITER API (DOS/Win) Version 1.7.3, 2013/8/6
The Joint Universal Parameter IdenTification and Evaluation of Reliability Application Programming Interface - KTRLine (Win) Version 1.0, 2010/01/11
Kendall-Theil Robust Line - LOADEST (Linux/Unix/Win)
Homepage for LOADEST software distributed by the U.S. Geological Survey - MkDF (Windows) Version 1.0, 2009/12/15
Obtaining and analyzing daily mean streamflow data from the U.S. Geological Survey National Water Information System Web Site: Make U.S. Environmental Protection Agency DFLOW3 batch-input files - MkPP (Windows) Version 1.0, 2009/12/15
Obtaining and analyzing daily mean streamflow data from the U.S. Geological Survey National Water Information System Web Site: Make Plotting Position - NSS (Win) Version 6.1, 2017/01/10
National Streamflow Statistics program - OPR-PPR (Win/DOS) Version 1.01, 2016/01/31
A Computer Program for Assessing Data Importance to Model Predictions Using Linear Statistics - QSTATS (Windows) Version 1.1, 2014/09/15
Obtaining and analyzing daily mean streamflow data from the U.S. Geological Survey National Water Information System Web Site: Streamflow (Q) Statistics - SEDSIZE (DOS/DG/Sun) Version 1.9, 1997/06/02
Particle-size statistics of fluvial sediments - SELDM (Win) Version 1.0.0.0, 2013/03/27
Stochastic empirical loading and dilution model - SREF (Windows) Version 1.0, 2009/12/15
Obtaining and analyzing daily mean streamflow data from the U.S. Geological Survey National Water Information System Web Site: Streamflow Record Extension Facilitator - StreamStats (online) Version 2, 2011/01/07
StreamStats streamflow statistics web application - SWSTAT (DOS/Sun) Version 4.1, 2002/02/25
Surface-Water Statistics - USGS Library for S-PLUS (Win) Version 4.0, 2011/07/13
A collection of functions, dialogs, and datasets for use in hydrologic applications - WREG (Win) Version 1.05, 2013/05/08
Weighted-multiple-linear REGression
Some related USGS-based content is featured below. This content is featured as projects, working groups, study areas, and other capability teams as they exist throughout the USGS Water Resources discipline.
Applied Statistical Methods and Tools
Everything you need to know about SPARROW
Delaware River Basin Focus Area Study: Statistical Streamflow Modeling
Determining Nutrient and Sediment Loads and Trends in the Chesapeake Bay Watershed by Using An Enhanced Statistical Technique
USGS-Chesapeake Bay Program Watershed Model
Below are publications associated with this project.
Incorporation of water-use summaries into the StreamStats web application for Maryland
Toward explaining nitrogen and phosphorus trends in Chesapeake Bay tributaries, 1992-2012
Spatial and Temporal Patterns of Best Management Practice Implementation in the Chesapeake Bay Watershed, 1985–2014
We use many tools at the USGS exclusively developed for and/or by the USGS. Below is a small sample of the statistical tools we use here at MD-DE-DC WSC.
StreamStats Application
StreamStats provides access to spatial analytical tools that are useful for water-resources planning and management, and for engineering and design purposes. The map-based user interface can be used to delineate drainage areas, get basin characteristics and estimates of flow statistics, and more. Available information varies from state to state.
WaterWatch Toolkit
The USGS WaterWatch Toolkit provides online tools that allow users to search USGS sites in various ways; create a variety of maps, graphs, charts, animations, and tables; perform a variety of streamflow analyses, and retrieve summary statistics.
USGS Statistics Web Service: Retrieve daily, monthly or annual statistics for sites. Statistics are provided on approved data for time-series sites. Statistics are available for any parameter with approved data.
USGS Instantaneous Values Web Service: Use this service to retrieve recent and historical values for streamflow as well as data for other regular time-series parameters served by the USGS.
Point-Source Load Estimation Tool (PSLoadEsT)
Software for generating reproducible load calculations for point source dischargers. Includes features to manage common data challenges such as duplicates, incompatible input tables, and missing nutrient concentration or effluent flow data.
National Streamflow Statistics (NSS) Application - Formerly NSS Program
The USGS develops regression equations for estimating streamflow statistics for every state, Puerto Rico, and a number of metropolitan areas in the U.S. These equations have been compiled into the National Streamflow Statistics (NSS) Application for design, planning, management, and regulatory purposes. These estimates are often needed at ungaged sites where no observed flow data are available.
API - Graphing Water Information System (GWIS)
GWIS (Graphing Water Information System) Javascript library can create time-series plots of information measured at USGS hydrologic data collection sites across the US. Developed by the USGS Texas Water Science Center, the user-friendly interface integrates the open-source dygraphs JavaScript charting library with the hydrologic data provided by USGS water services.
SELDM: Stochastic Empirical Loading and Dilution Model - Software page
Overview
The Stochastic Empirical Loading and Dilution Model (SELDM) is designed to transform complex scientific data into meaningful information about the risk of adverse effects of runoff on receiving waters, the potential need for mitigation measures, and the potential effectiveness of such management measures for reducing these risks.
KTRLine: Kendall-Theil Robust Line - Software page
Overview
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.
SutraPlot: A Windows-Based Visualization Tool for 2D and 3D SUTRA Simulations
SutraPlot creates 2D and rotatable 3D plots from 2D and 3D SUTRA output data.
- Overview
This site is dedicated to Coding and Statistical Data that is produced and analyzed by scientists at the MD-DE-DC WSC. We use many tools at the USGS including software exclusively developed for, sometimes written by the USGS.
Wastewater Nutrient Data Preps, Estimates using PSLoadEsTThe Point-Source Load Estimation Tool (PSLoadEsT) provides a user-friendly interface for generating reproducible load calculations for point source dischargers while managing common data challenges. This report serves as a detailed user's guide.
Bank‐derived material tops fluvial sediment in suburban watershedExcess fine sediment is a leading cause of ecological degradation within the Chesapeake Bay watershed. To effectively target sediment mitigation measures, it is necessary to identify and quantify the delivery of sediment sources to local waterbodies.
What the MD-DE-DC WSC is capable of doing within the realms Coding and Statistical Data...
Important things happening related to Coding and Statistical Data:
11 May 2020 Introduction to the dataRetrieval package
The dataRetrieval package was created to simplify the process of loading hydrologic data into the R environment. It is designed to retrieve the major data types of U.S. Geological Survey (USGS) hydrologic data that are available on the Web, as well as data from the Water Quality Portal (WQP), which currently houses water quality data from the Environmental Protection Agency (EPA), U.S. Department of Agriculture (USDA), and USGS. Direct USGS data is obtained from a service called the National Water Information System (NWIS).
Statistics Web Service
Here is a sample of our exclusive USGS-based software:
- GNWISQ (Windows) Version 1.1, 2014/09/15
Obtaining and analyzing daily mean streamflow data from the U.S. Geological Survey National Water Information System Web Site: Get National Water Information System Streamflow (Q) files - HydroClimATe (WIN) Version 1.0.0, 2014/03/07
Computer program for assessing the relations among variable climatic and hydrologic time-series data - HyDroDSS (Windows) Version 1.0.0.0, 2014/03/27
Hydrologic Drought Decision Support System - JUPITER API (DOS/Win) Version 1.7.3, 2013/8/6
The Joint Universal Parameter IdenTification and Evaluation of Reliability Application Programming Interface - KTRLine (Win) Version 1.0, 2010/01/11
Kendall-Theil Robust Line - LOADEST (Linux/Unix/Win)
Homepage for LOADEST software distributed by the U.S. Geological Survey - MkDF (Windows) Version 1.0, 2009/12/15
Obtaining and analyzing daily mean streamflow data from the U.S. Geological Survey National Water Information System Web Site: Make U.S. Environmental Protection Agency DFLOW3 batch-input files - MkPP (Windows) Version 1.0, 2009/12/15
Obtaining and analyzing daily mean streamflow data from the U.S. Geological Survey National Water Information System Web Site: Make Plotting Position - NSS (Win) Version 6.1, 2017/01/10
National Streamflow Statistics program - OPR-PPR (Win/DOS) Version 1.01, 2016/01/31
A Computer Program for Assessing Data Importance to Model Predictions Using Linear Statistics - QSTATS (Windows) Version 1.1, 2014/09/15
Obtaining and analyzing daily mean streamflow data from the U.S. Geological Survey National Water Information System Web Site: Streamflow (Q) Statistics - SEDSIZE (DOS/DG/Sun) Version 1.9, 1997/06/02
Particle-size statistics of fluvial sediments - SELDM (Win) Version 1.0.0.0, 2013/03/27
Stochastic empirical loading and dilution model - SREF (Windows) Version 1.0, 2009/12/15
Obtaining and analyzing daily mean streamflow data from the U.S. Geological Survey National Water Information System Web Site: Streamflow Record Extension Facilitator - StreamStats (online) Version 2, 2011/01/07
StreamStats streamflow statistics web application - SWSTAT (DOS/Sun) Version 4.1, 2002/02/25
Surface-Water Statistics - USGS Library for S-PLUS (Win) Version 4.0, 2011/07/13
A collection of functions, dialogs, and datasets for use in hydrologic applications - WREG (Win) Version 1.05, 2013/05/08
Weighted-multiple-linear REGression
- GNWISQ (Windows) Version 1.1, 2014/09/15
- Science
Some related USGS-based content is featured below. This content is featured as projects, working groups, study areas, and other capability teams as they exist throughout the USGS Water Resources discipline.
Applied Statistical Methods and Tools
This research theme addresses several issues important in deriving accurate and precise estimates of fatality at wind and solar power-generation facilities.Everything you need to know about SPARROW
What is SPARROW? SPARROW (SPAtially Referenced Regression On Watershed attributes) is a watershed modeling technique for relating water-quality measurements made at a network of monitoring stations to attributes of the watersheds such as contaminant sources and environmental factors that affect rates of delivery to streams and in-stream processing. The core of the model consists of a nonlinear...Delaware River Basin Focus Area Study: Statistical Streamflow Modeling
The Delaware River Basin Streamflow Estimator Tool (DRB-SET) uses historical records of streamflow to estimate daily mean streamflow at any stream location within the Delaware River Basin for the period 1960-2010, incorporating basin characteristics such as drainage size, soil, geology, and seasonal precipitation.Determining Nutrient and Sediment Loads and Trends in the Chesapeake Bay Watershed by Using An Enhanced Statistical Technique
As the largest and most productive estuary in North America, Chesapeake Bay is a vital ecological and economic resource. In recent decades, however, the bay and its tributaries have been degraded by excessive inputs of nutrients (nitrogen and phosphorus) and sediment from contributing watersheds, and in 1998, the Chesapeake Bay and its tidal tributaries were listed as “impaired” under the Clean...USGS-Chesapeake Bay Program Watershed Model
The USGS is collaborating with the Chesapeake Bay Program (CBP) to incorporate the USGS Potomac Watershed and Chesapeake Bay Virginia Watershed models into Phase 5 of the Chesapeake Bay Watershed Model (CBWM). - Publications
Below are publications associated with this project.
Incorporation of water-use summaries into the StreamStats web application for Maryland
Approximately 25,000 new households and thousands of new jobs will be established in an area that extends from southwest to northeast of Baltimore, Maryland, as a result of the Federal Base Realignment and Closure (BRAC) process, with consequent new demands on the water resources of the area. The U.S. Geological Survey, in cooperation with the Maryland Department of the Environment, has extended tAuthorsKernell G. Ries, Marilee A. Horn, Mark R. Nardi, Steven TesslerToward explaining nitrogen and phosphorus trends in Chesapeake Bay tributaries, 1992-2012
Understanding trends in stream chemistry is critical to watershed management, and often complicated by multiple contaminant sources and landscape conditions changing over varying time scales. We adapted spatially-referenced regression (SPARROW) to infer causes of recent nutrient trends in Chesapeake Bay tributaries by relating observed fluxes during 1992, 2002, and 2012 to contemporary inputs andAuthorsScott Ator, Ana M. Garcia, Gregory E. Schwarz, Joel Blomquist, Andrew SekellickSpatial and Temporal Patterns of Best Management Practice Implementation in the Chesapeake Bay Watershed, 1985–2014
Efforts to restore water quality in Chesapeake Bay and its tributaries often include extensive Best Management Practice (BMP) implementation on agricultural and developed lands. These BMPs include a variety of methods to reduce nutrient and sediment loads, such as cover crops, conservation tillage, urban filtering systems, and other practices.Estimates of BMP implementation throughout the ChesapeaAuthorsAndrew J. Sekellick, Olivia H. Devereux, Jennifer L. D. Keisman, Jeffrey S. Sweeney, Joel D. Blomquist - Web Tools
We use many tools at the USGS exclusively developed for and/or by the USGS. Below is a small sample of the statistical tools we use here at MD-DE-DC WSC.
StreamStats Application
StreamStats provides access to spatial analytical tools that are useful for water-resources planning and management, and for engineering and design purposes. The map-based user interface can be used to delineate drainage areas, get basin characteristics and estimates of flow statistics, and more. Available information varies from state to state.
ByWater Resources Mission Area, New England Water Science Center, New Jersey Water Science Center, New Mexico Water Science Center, New York Water Science Center, Oregon Water Science Center, Pacific Islands Water Science Center, Pennsylvania Water Science Center, South Atlantic Water Science Center (SAWSC), Upper Midwest Water Science Center, Wyoming-Montana Water Science CenterWaterWatch Toolkit
The USGS WaterWatch Toolkit provides online tools that allow users to search USGS sites in various ways; create a variety of maps, graphs, charts, animations, and tables; perform a variety of streamflow analyses, and retrieve summary statistics.
- Software
USGS Statistics Web Service: Retrieve daily, monthly or annual statistics for sites. Statistics are provided on approved data for time-series sites. Statistics are available for any parameter with approved data.
USGS Instantaneous Values Web Service: Use this service to retrieve recent and historical values for streamflow as well as data for other regular time-series parameters served by the USGS.
Point-Source Load Estimation Tool (PSLoadEsT)
Software for generating reproducible load calculations for point source dischargers. Includes features to manage common data challenges such as duplicates, incompatible input tables, and missing nutrient concentration or effluent flow data.
National Streamflow Statistics (NSS) Application - Formerly NSS Program
The USGS develops regression equations for estimating streamflow statistics for every state, Puerto Rico, and a number of metropolitan areas in the U.S. These equations have been compiled into the National Streamflow Statistics (NSS) Application for design, planning, management, and regulatory purposes. These estimates are often needed at ungaged sites where no observed flow data are available.
API - Graphing Water Information System (GWIS)
GWIS (Graphing Water Information System) Javascript library can create time-series plots of information measured at USGS hydrologic data collection sites across the US. Developed by the USGS Texas Water Science Center, the user-friendly interface integrates the open-source dygraphs JavaScript charting library with the hydrologic data provided by USGS water services.
SELDM: Stochastic Empirical Loading and Dilution Model - Software page
Overview
The Stochastic Empirical Loading and Dilution Model (SELDM) is designed to transform complex scientific data into meaningful information about the risk of adverse effects of runoff on receiving waters, the potential need for mitigation measures, and the potential effectiveness of such management measures for reducing these risks.
KTRLine: Kendall-Theil Robust Line - Software page
Overview
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.
SutraPlot: A Windows-Based Visualization Tool for 2D and 3D SUTRA Simulations
SutraPlot creates 2D and rotatable 3D plots from 2D and 3D SUTRA output data.