SPARROW Mapper - Midwest
Modeling streamflow, nitrogen, phosphorus, and suspended sediments in streams of the Midwestern U.S.
SPARROW Mapper - Northeast
Modeling nitrogen, phosphorus, and suspended sediments in upland watersheds, tributary streams, and downstream estuaries of the Northeastern U.S.
SPARROW Mapper - Pacific
Modeling streamflow, nitrogen, phosphorus, and suspended sediments in streams and coastal waters of the Pacific U.S.
SPARROW Mapper - Southeast
Modeling streamflow, nitrogen, phosphorus, and suspended sediments in streams and coastal waters of the Southeastern U.S.
SPARROW Mapper - Southwest
Modeling how climate, land use, and landscape characteristics control water availability, nutrients, and suspended sediment in the Southwestern U.S.
SPARROW mappers are interactive tools that allow the user to explore river streamflow and nutrient and sediment loads and yields and the importance of different sources of contaminants in a particular river basin. Data can be visualized using maps and interactive graphs and tables, and rankings can be shown by state, major watershed, hydrologic unit (HUC), and catchment.
2012 Mappers
2012 SPARROW (SPAtially Referenced Regressions On Watershed attributes) mappers are available for 5 regions of the conterminous United States. These mappers simulate streamflow and constituent loads that would occur under long-term average hydrologic conditions, for the time period 1999 through 2014, and source inputs that occurred during or near 2012.
Using the 2012 Mappers
Available data filters on the SPARROW Mappers allow you to view total phosphorus, total nitrogen, suspended sediment, and streamflow.
The "Area of Interest" filter allows you to focus on a selected area (state, major watershed, HUC and catchment), while the "Group Results By" filter allows you to change the way the data is shown.
Modeling results can be exported as an Excel spreadsheet, a CSV file, or a geospatial dataset.
MIDWEST
- Mapper: 2012 SPARROW Models for the Midwest: Total Phosphorus, Total Nitrogen, Suspended Sediment, and Streamflow
- Report: Spatially Referenced Models of Streamflow and Nitrogen, Phosphorus, and Suspended-Sediment Loads in Streams of the Midwestern United States (SIR 2019-5114)
- Model Data Release: SPARROW model inputs and simulated streamflow, nutrient and suspended-sediment loads in streams of the Midwestern United States, 2012 base year
NORTHEAST
- Mapper: 2012 SPARROW Models for the Northeast: Total Phosphorus, Total Nitrogen, Suspended Sediment, and Streamflow
- Report: Spatially Referenced Models of Streamflow and Nitrogen, Phosphorus, and Suspended-Sediment Loads in Streams of the Northeastern United States (SIR 2019-5118)
- Model Data Release: SPARROW model inputs and simulated streamflow, nutrient and suspended-sediment loads in streams of the Northeastern United States, 2012 Base Year
PACIFIC
- Mapper: 2012 SPARROW Models for the Pacific: Total Phosphorus, Total Nitrogen, Suspended Sediment, and Streamflow
- Report: Spatially Referenced Models of Streamflow and Nitrogen, Phosphorus, and Suspended-Sediment Loads in Streams of the Pacific Region of the United States (SIR 2019-5112)
- Model Data Release: SPARROW model inputs and simulated streamflow, nutrient and suspended-sediment loads in streams of the Pacific Region of the United States, 2012 base year
SOUTHEAST
- Mapper: 2012 SPARROW Models for the Southeast: Total Phosphorus, Total Nitrogen, Suspended Sediment, and Streamflow
- Report: Spatially Referenced Models of Streamflow and Nitrogen, Phosphorus, and Suspended-Sediment Loads in Streams of the Southeastern United States (SIR 2019-5135)
- Model Data Release: SPARROW model inputs and simulated streamflow, nutrient and suspended-sediment loads in streams of the Southeastern United States, 2012 base year
SOUTHWEST
- Mapper: 2012 SPARROW Models for the Southwest: Total Phosphorus, Total Nitrogen, Suspended Sediment, and Streamflow
- Report: Spatially Referenced Models of Streamflow and Nitrogen, Phosphorus, and Suspended-Sediment Loads in Streams of the Southwestern United States (SIR 2019-5106)
- Model Data Release: SPARROW model inputs and simulated streamflow, nutrient and suspended-sediment loads in streams of the Southwestern United States, 2012 base year
2002 Mappers
2002 SPARROW mappers simulate constituent loads that would occur under long-term average hydrologic conditions, for the time period 1970 through 2007, and source inputs that occurred during or near 2002.
- 2002 SPARROW Model Results for the Midcontinental Region of North America: Total Phosphorus and Total Nitrogen
- Eastern United States 2002 Nutrient Loading
SPARROW mapper source input years
Why 2012 as a base year?
SPARROW models simulate loads that would occur given source inputs for a specific year and flows based on long-term average hydrologic conditions. Simulating long-term average hydrologic conditions allows modeling of large spatial areas without concern for the effects of localized, short-term variability in climatic conditions.
Source input years for the 2002 and 2012 models were chosen to represent the most up-to-date input data that was available at the time these models were initially constructed.
The SPARROW Mappers replace the SPARROW Decision Support System (Booth and others, 2011).
SPARROW modeling: Estimating nutrient, sediment, and dissolved solids transport
Everything you need to know about SPARROW
SPARROW mappers are interactive tools that allow the user to explore river streamflow and nutrient and sediment loads and yields and the importance of different sources of contaminants in a particular river basin. Data can be visualized using maps and interactive graphs and tables, and rankings can be shown by state, major watershed, hydrologic unit (HUC), and catchment.
2012 Mappers
2012 SPARROW (SPAtially Referenced Regressions On Watershed attributes) mappers are available for 5 regions of the conterminous United States. These mappers simulate streamflow and constituent loads that would occur under long-term average hydrologic conditions, for the time period 1999 through 2014, and source inputs that occurred during or near 2012.
Using the 2012 Mappers
Available data filters on the SPARROW Mappers allow you to view total phosphorus, total nitrogen, suspended sediment, and streamflow.
The "Area of Interest" filter allows you to focus on a selected area (state, major watershed, HUC and catchment), while the "Group Results By" filter allows you to change the way the data is shown.
Modeling results can be exported as an Excel spreadsheet, a CSV file, or a geospatial dataset.
MIDWEST
- Mapper: 2012 SPARROW Models for the Midwest: Total Phosphorus, Total Nitrogen, Suspended Sediment, and Streamflow
- Report: Spatially Referenced Models of Streamflow and Nitrogen, Phosphorus, and Suspended-Sediment Loads in Streams of the Midwestern United States (SIR 2019-5114)
- Model Data Release: SPARROW model inputs and simulated streamflow, nutrient and suspended-sediment loads in streams of the Midwestern United States, 2012 base year
NORTHEAST
- Mapper: 2012 SPARROW Models for the Northeast: Total Phosphorus, Total Nitrogen, Suspended Sediment, and Streamflow
- Report: Spatially Referenced Models of Streamflow and Nitrogen, Phosphorus, and Suspended-Sediment Loads in Streams of the Northeastern United States (SIR 2019-5118)
- Model Data Release: SPARROW model inputs and simulated streamflow, nutrient and suspended-sediment loads in streams of the Northeastern United States, 2012 Base Year
PACIFIC
- Mapper: 2012 SPARROW Models for the Pacific: Total Phosphorus, Total Nitrogen, Suspended Sediment, and Streamflow
- Report: Spatially Referenced Models of Streamflow and Nitrogen, Phosphorus, and Suspended-Sediment Loads in Streams of the Pacific Region of the United States (SIR 2019-5112)
- Model Data Release: SPARROW model inputs and simulated streamflow, nutrient and suspended-sediment loads in streams of the Pacific Region of the United States, 2012 base year
SOUTHEAST
- Mapper: 2012 SPARROW Models for the Southeast: Total Phosphorus, Total Nitrogen, Suspended Sediment, and Streamflow
- Report: Spatially Referenced Models of Streamflow and Nitrogen, Phosphorus, and Suspended-Sediment Loads in Streams of the Southeastern United States (SIR 2019-5135)
- Model Data Release: SPARROW model inputs and simulated streamflow, nutrient and suspended-sediment loads in streams of the Southeastern United States, 2012 base year
SOUTHWEST
- Mapper: 2012 SPARROW Models for the Southwest: Total Phosphorus, Total Nitrogen, Suspended Sediment, and Streamflow
- Report: Spatially Referenced Models of Streamflow and Nitrogen, Phosphorus, and Suspended-Sediment Loads in Streams of the Southwestern United States (SIR 2019-5106)
- Model Data Release: SPARROW model inputs and simulated streamflow, nutrient and suspended-sediment loads in streams of the Southwestern United States, 2012 base year
2002 Mappers
2002 SPARROW mappers simulate constituent loads that would occur under long-term average hydrologic conditions, for the time period 1970 through 2007, and source inputs that occurred during or near 2002.
- 2002 SPARROW Model Results for the Midcontinental Region of North America: Total Phosphorus and Total Nitrogen
- Eastern United States 2002 Nutrient Loading
SPARROW mapper source input years
Why 2012 as a base year?
SPARROW models simulate loads that would occur given source inputs for a specific year and flows based on long-term average hydrologic conditions. Simulating long-term average hydrologic conditions allows modeling of large spatial areas without concern for the effects of localized, short-term variability in climatic conditions.
Source input years for the 2002 and 2012 models were chosen to represent the most up-to-date input data that was available at the time these models were initially constructed.
The SPARROW Mappers replace the SPARROW Decision Support System (Booth and others, 2011).