David A Saad
David Saad is Chief of the Environmental Hydrodynamics Branch, Earth System Processes Division, USGS Water Resources Mission Area.
In the Environmental Hydrodynamics Branch, Dave oversees a diverse group of multi-disciplinary researchers and scientists who study the connections between surface and groundwater hydraulics and chemical and ecological fate and transport. This includes human and natural influences on the quality of surface and groundwater.
Dave has been with the USGS since 1987 where he has been a scientist (hydrologist), project manager, team leader, and supervisor in the Pennsylvania and Upper Midwest Water Science Centers and the Water Mission Area. In Pennsylvania, he worked on projects evaluating coal-mining reclamation methods and the effects on acid-mine drainage. In Wisconsin, Dave was the groundwater specialist and study unit chief of the Western Lake Michigan Drainages study unit of the USGS National Water Quality Assessment (NAWQA) program. He also worked on groundwater modeling projects for the Water Science Center. Dave also developed regional SPARROW (stream-water quality) models of the Midwest for NAWQA and binational SPARROW models of the Great Lakes Basin in collaboration with the International Joint Commission and the National Research Council Canada. In addition to being a branch chief with the Water Mission Area, Dave is currently project manager for “Quantifying Water Reuse and Return Flow Influences on Water Quality and Suitability”. This project is looking at the influences of return flow on water availability and is utilizing SPARROW models to achieve project goals.
Education and Certifications
B.S. in Geology, University of Wisconsin-Madison, 1987
Science and Products
An extrapolation method for estimating loads from unmonitored areas using watershed model load ratios
Effects of return flows on stream water quality and availability in the Upper Colorado, Delaware, and Illinois River Basins
Quantifying regional effects of best management practices on nutrient losses from agricultural lands
Estimating urban air pollution contribution to South Platte River nitrogen loads with National Atmospheric Deposition Program data and SPARROW model
Nitrogen and phosphorus sources and delivery from the Mississippi/Atchafalaya River Basin: An update using 2012 SPARROW models
Phosphorus and nitrogen transport in the binational Great Lakes Basin estimated using SPARROW watershed models
Estimates of long-term mean daily streamflow and annual nutrient and suspended-sediment loads considered for use in regional SPARROW models of the Conterminous United States, 2012 base year
Spatially referenced models of streamflow and nitrogen, phosphorus, and suspended-sediment loads in streams of the midwestern United States
Estimates of long-term mean-annual nutrient loads considered for use in SPARROW models of the Midcontinental region of Canada and the United States, 2002 base year
Geospatial data for developing nutrient SPARROW models for the Midcontinental region of Canada and the United States
Nutrient delivery to Lake Winnipeg from the Red-Assiniboine River Basin – A binational application of the SPARROW model
Geomorphic, flood, and groundwater-flow characteristics of Bayfield Peninsula streams, Wisconsin, and implications for brook-trout habitat
SPARROW Mappers
SPARROW modeling: Great Lakes, Mississippi River, Ohio River, and Red River Basins
SPARROW nutrient modeling: Mississippi/Atchafalaya River Basin (MARB)
SPARROW nutrient modeling: Binational (US/Canada) models
SPARROW modeling: Estimating nutrient, sediment, and dissolved solids transport
Everything you need to know about SPARROW
SPARROW: Attributes for NHDPlus Catchments (Version 1.1) for the Conterminous United States
SPARROW: Attributes for MRB_E2RF1 Catchments by Major River Basins in the Conterminous United States
Nutrient Load Data used to Quantify Regional Effects of Agricultural Best Management Practices: An application of the 2012 SPARROW models for the Midwest, Northeast, and Southeast United States
Long-term mean annual total nitrogen and total phosphorus loads estimated using Fluxmaster 5-parameter models and detrended to 2012, Midwest Region of the United States, 1999-2014
SPARROW model inputs and simulated streamflow, nutrient and suspended-sediment loads in streams of the Midwestern United States, 2012 Base Year
SPARROW model simulated nutrient loads in streams of the Midcontinental Region of Canada and the United States, 2002 Base Year
Water-quality and streamflow datasets used for estimating long-term mean daily streamflow and annual loads to be considered for use in regional streamflow, nutrient and sediment SPARROW models, United States, 1999-2014
Water-quality and streamflow datasets used for estimating loads considered for use in the 2002 Midcontinent nutrient SPARROW models, United States and Canada, 1970-2012
2012 SPARROW Models for the Midwest: Total Phosphorus, Total Nitrogen, Suspended Sediment, and Streamflow
2012 SPARROW (SPAtially Referenced Regressions On Watershed attributes) interactive mappers are available for 5 regions of the conterminous U.S. These mappers simulate river streamflow, and nutrient and sediment loads and yields, 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.
2002 SPARROW Model Results for the Midcontinental Region of North America: Total Phosphorus and Total Nitrogen
SPARROW model results of long-term mean-annual total nitrogen and total phosphorus in streams of the Midcontinental Region of North America. The simulated loads represent source inputs similar to 2002 and normalized to long-term average hydrologic conditions for the period from 1970 to through 2012.
SPARROW Modeling Program
SPARROW is a popular watershed modeling technique, distributed by the USGS, that estimates the amount of a contaminant transported from inland watersheds to larger water bodies by linking monitoring data with information on watershed characteristics and contaminant sources.
Science and Products
An extrapolation method for estimating loads from unmonitored areas using watershed model load ratios
Effects of return flows on stream water quality and availability in the Upper Colorado, Delaware, and Illinois River Basins
Quantifying regional effects of best management practices on nutrient losses from agricultural lands
Estimating urban air pollution contribution to South Platte River nitrogen loads with National Atmospheric Deposition Program data and SPARROW model
Nitrogen and phosphorus sources and delivery from the Mississippi/Atchafalaya River Basin: An update using 2012 SPARROW models
Phosphorus and nitrogen transport in the binational Great Lakes Basin estimated using SPARROW watershed models
Estimates of long-term mean daily streamflow and annual nutrient and suspended-sediment loads considered for use in regional SPARROW models of the Conterminous United States, 2012 base year
Spatially referenced models of streamflow and nitrogen, phosphorus, and suspended-sediment loads in streams of the midwestern United States
Estimates of long-term mean-annual nutrient loads considered for use in SPARROW models of the Midcontinental region of Canada and the United States, 2002 base year
Geospatial data for developing nutrient SPARROW models for the Midcontinental region of Canada and the United States
Nutrient delivery to Lake Winnipeg from the Red-Assiniboine River Basin – A binational application of the SPARROW model
Geomorphic, flood, and groundwater-flow characteristics of Bayfield Peninsula streams, Wisconsin, and implications for brook-trout habitat
SPARROW Mappers
SPARROW modeling: Great Lakes, Mississippi River, Ohio River, and Red River Basins
SPARROW nutrient modeling: Mississippi/Atchafalaya River Basin (MARB)
SPARROW nutrient modeling: Binational (US/Canada) models
SPARROW modeling: Estimating nutrient, sediment, and dissolved solids transport
Everything you need to know about SPARROW
SPARROW: Attributes for NHDPlus Catchments (Version 1.1) for the Conterminous United States
SPARROW: Attributes for MRB_E2RF1 Catchments by Major River Basins in the Conterminous United States
Nutrient Load Data used to Quantify Regional Effects of Agricultural Best Management Practices: An application of the 2012 SPARROW models for the Midwest, Northeast, and Southeast United States
Long-term mean annual total nitrogen and total phosphorus loads estimated using Fluxmaster 5-parameter models and detrended to 2012, Midwest Region of the United States, 1999-2014
SPARROW model inputs and simulated streamflow, nutrient and suspended-sediment loads in streams of the Midwestern United States, 2012 Base Year
SPARROW model simulated nutrient loads in streams of the Midcontinental Region of Canada and the United States, 2002 Base Year
Water-quality and streamflow datasets used for estimating long-term mean daily streamflow and annual loads to be considered for use in regional streamflow, nutrient and sediment SPARROW models, United States, 1999-2014
Water-quality and streamflow datasets used for estimating loads considered for use in the 2002 Midcontinent nutrient SPARROW models, United States and Canada, 1970-2012
2012 SPARROW Models for the Midwest: Total Phosphorus, Total Nitrogen, Suspended Sediment, and Streamflow
2012 SPARROW (SPAtially Referenced Regressions On Watershed attributes) interactive mappers are available for 5 regions of the conterminous U.S. These mappers simulate river streamflow, and nutrient and sediment loads and yields, 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.
2002 SPARROW Model Results for the Midcontinental Region of North America: Total Phosphorus and Total Nitrogen
SPARROW model results of long-term mean-annual total nitrogen and total phosphorus in streams of the Midcontinental Region of North America. The simulated loads represent source inputs similar to 2002 and normalized to long-term average hydrologic conditions for the period from 1970 to through 2012.
SPARROW Modeling Program
SPARROW is a popular watershed modeling technique, distributed by the USGS, that estimates the amount of a contaminant transported from inland watersheds to larger water bodies by linking monitoring data with information on watershed characteristics and contaminant sources.