Dale M Robertson
Biography
Dale Robertson is a Research Hydrologist with the U.S. Geological Survey, Wisconsin Water Science Center in Middleton, Wisconsin. He is an Adjunct Professor at the University of Wisconsin-Green Bay, Michigan Technological University, and University of Toledo, and a Honorary Fellow with the Center for Limnology at the University of Wisconsin-Madison. His current research with the USGS deals with modeling eutrophication and mixing in lakes, estimating loads and concentrations of nutrients and sediment in streams over large geographic areas, such as the Great Lakes and Mississippi River Basins, developing nutrient criteria for streams and rivers, and examining the effects of climate change on the physical dynamics, ice cover, and productivity of lakes.
EDUCATION
B.S. in Biology, Chemistry, and Mathematics - St. Norbert College, DePere, Wisconsin, 1976-1981.
M.S. in Oceanography and Limnology - University of Wisconsin-Madison, Wisconsin. Thesis: "Interbasin Separation and Its Impact on the Annual Heat Budgets of the Individual Basins in Trout Lake, Wisconsin," 1981-1984.
Ph.D. in Oceanography and Limnology - University of Wisconsin-Madison, Wisconsin. Dissertation: "The Use of Lake Water Temperature and Ice Cover as Climatic Indicators", 1984-1989.
Post-Doctoral Research Fellow, in Reservoir Modeling - Centre for Water Research, University of Western Australia, Perth. 1989-1991.
AREAS OF EXPERTISE
- Biogeochemistry - Hydrology/Limnology
- Eutrophication - Nutrient Transport and Fate
- Limnology
- Water-quality modeling in Lakes
- Watershed modeling (SPARROW)
- Influence of environmental factors, watershed management strategies, and in-lake management alternatives on the water quality of rivers and lakes
- Climate Change - Ice as climatic indicators
- Regional loading estimates
Science and Products
Lake monitoring and research
Studying lakes provides an improved understanding of lake ecosystem dynamics and valuable information that helps lead to sound lake-management policies. The USGS collects hydrologic data in lake settings, studies water and nutrient budget development, conducts source-loading analysis, explores groundwater interactions, and performs lake water-quality modeling.
Little St. Germain Lake: Phosphorus loading, winter anoxia, and stage regulation
Little St. Germain Lake, Wis., consists of four main basins separated by narrows. This study monitored lake water quality, identified phosphorus sources, determined spatial and temporal distribution of oxygen, evaluated the effectiveness of winter aeration systems, and modeled groundwater/lake-water interactions.
SPARROW nutrient modeling: Great Lakes, Ohio, Upper Mississippi, Red River Basins (MRB3)
SPARROW models for the Great Lakes, Ohio, Upper Mississippi and Red River Basins (MRB3) predict long-term average loads, concentrations, yields, and source contributions of nitrogen and phosphorus to the Great Lakes.
SPARROW nutrient modeling: Mississippi/Atchafalaya River Basin (MARB)
SPARROW models for the Mississippi/Atchafalaya River Basin (MARB) predict long-term average loads, concentrations, yields, and source contributions of nitrogen and phosphorus to the Gulf of Mexico.
SPARROW nutrient modeling: Binational (US/Canada) models
SPARROW phosphorus and nitrogen models are being developed for the entire Great Lakes Basin and the Upper Midwest part of the U.S., and the Red and Assiniboine River Basin, as part of a Binational project between the USGS and the International Joint Commission (IJC) and National Research Council (NRC) of Canada.
SPARROW modeling: Estimating nutrient, sediment, and dissolved solids transport
SPARROW (SPAtially Referenced Regressions On Watershed attributes) models estimate 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. Explore relations between human activities, natural processes, and contaminant transport using interactive Mappers.
Winnebago pool lakes: Hydrology, water quality, and response to simulated changes in phosphorus loading
The Winnebago Pool Lakes are shallow, productive drainage lakes that have accumulated nutrients from its mixed agricultural/forest watershed and from the Fox River. High phosphorus concentrations often result in severe blue-green algae blooms that can produce harmful toxins. The USGS is evaluating the water quality and phosphorus budget of each lake and modeling eutrophication responses.
Green Lake and its tributaries: Water quality and hydrology
Big Green Lake is the deepest natural lake in Wisconsin. Changes in agriculture and urban development have altered the nutrient loading from the watershed and affected the water quality of the lake. This project is quantifying the amount of phosphorus and sediment delivered to Green Lake, measuring its water quality, and providing information about how the lake responds to input changes.
Anvil Lake: Response of lake water quality to changes in nutrient loading, with special emphasis on the effects of changes in water level
Anvil Lake is a relatively shallow, high-quality lake whose water level has dropped dramatically in recent years, adversely affecting the recreational and aesthetic values of the lake. The USGS is developing detailed water and phosphorus budgets, determining groundwater contributions, modeling likely responses to changes in phosphorus loading, and assessing the effect of climate on water...
Delavan Lake: Hydrology, water quality, and biology
Eutrophication of Delavan Lake accelerated from the 1940s to 1980s, resulting in a hypereutrophic lake with severe blue-green algae blooms. Extensive rehabilitation efforts were implemented to improve water quality. The USGS measured nutrients, suspended sediment, water quality, and plankton populations to quantify the effectiveness of rehabilitation efforts and guide future management...
Geneva Lake: Water quality, hydrology, and biology
To reduce the impact of increasing urban development and recreational use on Geneva Lake, efforts are being made to decrease point- and nonpoint-source pollution inputs. To document Geneva Lake's water quality, the USGS collected water-quality data and developed empirical eutrophication models to demonstrate that reductions in phosphorus loading were related to water-quality improvements.
Water quality of the lower Fox River tributaries and Duck Creek watersheds
The USGS is evaluating the effectiveness of non-point pollution control measures in five watersheds in the Lower Fox River and Duck Creek watersheds and comparing daily phosphorus and suspended solids loads for each watershed.
Red–Assiniboine River Basin (RARB) SPARROW Mapper, 2002
This mapper displays SPARROW nutrient load and yield data and the importance of various nutrient sources for the RARB, given nutrient inputs similar to 2002. Rankings can be shown by country, state/province, HUC4, HUC8, and catchment. Nutrient data can be explored using maps and interactive graphs and tables. Modeling results can be exported as an Excel spreadsheet or a geospatial dataset.
Great Lakes, Ohio, Upper Mississippi, Red River Basins (MRB3) SPARROW Mapper, 2002
This mapper displays SPARROW nutrient load and yield data and the importance of various nutrient sources for the MRB3, given nutrient inputs similar to 2002. Rankings can be shown by major watershed, state, HUC8, tributary, and catchment. Nutrient data can be explored using maps and interactive graphs and tables. Modeling results can be exported as an Excel spreadsheet or a geospatial dataset.
Great Lakes SPARROW Mapper, 2002
This mapper displays SPARROW nutrient load and yield data specifically for U.S. tributaries to the Great Lakes. The results are based on the SPARROW models developed for the Great Lakes, Ohio, Upper Mississippi, Red River Basins (MRB3). Modeling results can be exported as an Excel spreadsheet or a geospatial dataset.
Mississippi/Atchafalaya River Basin (MARB) SPARROW Mapper, 2002
The mapper displays SPARROW nutrient load and yield data and the importance of various nutrient sources for the MARB, given nutrient inputs similar to 2002. Rankings can be shown by major watershed, state, HUC8, tributary, and catchment. Nutrient data can be explored using maps and interactive graphs and tables. Modeling results can be exported as an Excel spreadsheet or a geospatial dataset.
Yellowstone River SPARROW Mapper, 2002
This mapper displays SPARROW nutrient load and yield data specifically for the Yellowstone River. The results are based on the SPARROW models developed for the Mississippi/Atchafalaya River Basin (MARB). Modeling results can be exported as an Excel spreadsheet or a geospatial dataset.
Red–Assiniboine River Basin (RARB) SPARROW Mapper, 2002
This mapper displays SPARROW nutrient load and yield data and the importance of various nutrient sources for the RARB, given nutrient inputs similar to 2002. Rankings can be shown by country, state/province, HUC4, HUC8, and catchment. Nutrient data can be explored using maps and interactive graphs and tables. Modeling results can be exported as an Excel spreadsheet or a geospatial dataset.
Great Lakes, Ohio, Upper Mississippi, Red River Basins (MRB3) SPARROW Mapper, 2002
This mapper displays SPARROW nutrient load and yield data and the importance of various nutrient sources for the MRB3, given nutrient inputs similar to 2002. Rankings can be shown by major watershed, state, HUC8, tributary, and catchment. Nutrient data can be explored using maps and interactive graphs and tables. Modeling results can be exported as an Excel spreadsheet or a geospatial dataset...
Great Lakes SPARROW Mapper, 2002
This mapper displays SPARROW nutrient load and yield data specifically for U.S. tributaries to the Great Lakes. The results are based on the SPARROW models developed for the Great Lakes, Ohio, Upper Mississippi, Red River Basins (MRB3). Modeling results can be exported as an Excel spreadsheet or a geospatial dataset.
Mississippi/Atchafalaya River Basin (MARB) SPARROW Mapper, 2002
The mapper displays SPARROW nutrient load and yield data and the importance of various nutrient sources for the MARB, given nutrient inputs similar to 2002. Rankings can be shown by major watershed, state, HUC8, tributary, and catchment. Nutrient data can be explored using maps and interactive graphs and tables. Modeling results can be exported as an Excel spreadsheet or a geospatial dataset...
Yellowstone River SPARROW Mapper, 2002
This mapper displays SPARROW nutrient load and yield data specifically for the Yellowstone River. The results are based on the SPARROW models developed for the Mississippi/Atchafalaya River Basin (MARB). Modeling results can be exported as an Excel spreadsheet or a geospatial dataset.
SPARROW Decision Support System (discontinued)
The SPARROW Decision Support System displays model predictions of water-quality conditions and sources by stream reach and catchment, tracks the transport to downstream receiving waters, and can be used to evaluate management source-reduction scenarios. Models currently available include national nitrogen, phosphorus, and suspended sediment models...
Modelling for catchment management
Catchment models are useful tools to help describe and quantify the sources, transport, and fate of sediment, nutrients, and other constituents in a landscape. Results from catchment models are used to quantify and understand existing conditions and used in restoration efforts by defining areas with highest contributions (hotspots, where actions...
Hamilton, David P.; Collier, Kevin J.; Quinn, John M.; Howard-Williams, Clive; Parshotam, Aroon; Robertson, Dale M. Physical, biogeochemical, and meteorological factors responsible for interannual changes in cyanobacterial community composition and biovolume over two decades in a eutrophic lake
This study used a 20-year dataset (1995–2014) to identify factors affecting cyanobacterial community composition (CCC) and abundance in a eutrophic lake. We hypothesized that differences in thermal structure, nutrients, and meteorology drive interannual variability in CCC and abundance. Cluster analysis differentiated dominant cyanobacteria into...
Weirich, Chelsea A.; Robertson, Dale M.; Miller, Todd R. Geospatial data for developing nutrient SPARROW models for the Midcontinental region of Canada and the United States
Through the International Watersheds Initiative of the International Joint Commission (IJC), the SpatiallyReferenced Regressions on Watershed attributes (SPARROW) model developed by the U.S. Geological Survey (USGS) is being applied to the Great Lakes, Rainy River – Lake of the Woods and Red-Assiniboine basins. The objective of this binational...
Vouk, Ivana; Burcher, Richard S.; Johnston, Craig M.; Jenkinson, R. Wayne; Saad, David A.; Gaiot, John S.; Benoy, Glenn A.; Robertson, Dale M.; Laitta, Michael Long-term rehabilitation of Delavan Lake, Wisconsin, USA
No abstract available.
Hamilton, D.; Collier, K.; Quinn, J.; Howard-Williams, C.; Robertson, Dale M.
Water-quality response to changes in phosphorus loading of the Winnebago Pool Lakes, Wisconsin, with special emphasis on the effects of internal loading in a chain of shallow lakes
The Winnebago Pool is a chain of four shallow lakes (Lake Poygan, Lake Winneconne, Lake Butte des Morts, and Lake Winnebago) that are fed primarily by the Fox and Wolf Rivers, two large agriculturally dominated rivers in Wisconsin, United States. Because the lakes have received extensive phosphorus inputs from their watershed, they have become...
Robertson, Dale M.; Siebers, Benjamin J.; Diebel, Matthew W.; Somor, Andrew J.
Evaluation of the effects of changes in the timing of water-level drawdowns on the export of phosphorus from Little St. Germain Lake, Wisconsin
Little St. Germain Lake is a 978-acre, multibasin lake in Vilas County, Wisconsin. In the interest of improving its water quality, the Little St. Germain Lake Protection and Rehabilitation District initiated a cooperative study with the U.S. Geological Survey to describe the current phosphorus input into and export from Little St. Germain Lake and...
Dantoin, Eric D.; Robertson, Dale M. Effects of air temperature and discharge on Upper Mississippi River summer water temperatures
Recent interest in the potential effects of climate change has prompted studies of air temperature and precipitation associations with water temperatures in rivers and streams. We examined associations between summer surface water temperatures and both air temperature and discharge for 5 reaches of the Upper Mississippi River during 1994–2011....
Gray, Brian R.; Robertson, Dale M.; Rogala, James T.
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
Streamflow and nutrient concentration data needed to compute nitrogen and phosphorus loads were compiled from Federal, State, Provincial, and local agency databases and also from selected university databases. The nitrogen and phosphorus loads are necessary inputs to Spatially Referenced Regressions on Watershed Attributes (SPARROW) models....
Saad, David A.; Benoy, Glenn A.; Robertson, Dale M. A surrogate regression approach for computing continuous loads for the tributary nutrient and sediment monitoring program on the Great Lakes
Water quality (WQ) in many Great Lake tributaries has been degraded (increased nutrient and sediment concentrations) due to changes in their watersheds, resulting in downstream eutrophication. As part of the Great Lakes Water Quality Agreement, specific goals were established for loading of specific constituents (e.g.,...
Robertson, Dale M.; Hubbard, Laura E.; Lorenz, David L.; Sullivan, Daniel J. Effects of water level and climate on the hydrodynamics and water quality of Anvil Lake, Wisconsin, a shallow seepage lake
Interannual differences in the water quality of Anvil Lake, Wisconsin, were examined to determine how water level and climate affect the hydrodynamics and trophic state of shallow lakes, and their importance compared to anthropogenic changes in the watershed. Anvil Lake is a relatively pristine seepage lake with hydrology dominated by...
Robertson, Dale M.; Juckem, Paul F.; Dantoin, Eric D.; Winslow, Luke A.
Lakes and reservoirs—Guidelines for study design and sampling
The “National Field Manual for the Collection of Water-Quality Data” (NFM) is an online report with separately published chapters that provides the protocols and guidelines by which U.S. Geological Survey personnel obtain the data used to assess the quality of the Nation’s surface-water and groundwater resources. Chapter A10 reviews limnological...
Seasonality of change: Summer warming rates do not fully represent effects of climate change on lake temperatures
Responses in lake temperatures to climate warming have primarily been characterized using seasonal metrics of surface-water temperatures such as summertime or stratified period average temperatures. However, climate warming may not affect water temperatures equally across seasons or depths. We analyzed a long-term dataset (1981–2015) of biweekly...
Winslow, Luke; Read, Jordan S.; Hansen, Gretchen J. A.; Rose, Kevin C.; Robertson, Dale M.
Sources of Excessive Nutrients in the Transboundary Red-Assiniboine River Basin Identified by Binational Research Team