Map of Green Lake, Wisconsin, and its watershed, with sampling data.
Dale M Robertson
Dale Robertson is a Research Hydrologist with the Upper Midwest Water Science Center.
Dale 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 various environmental factors on the physical dynamics, ice cover, and productivity of lakes.
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
- Regional loading estimates
Science and Products
Filter Total Items: 14
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.
SPARROW modeling: Great Lakes, Mississippi River, Ohio River, and Red River Basins
SPARROW models for the Great Lakes, Ohio River, Upper Mississippi River, and Red River Basins predict long-term mean annual loads, yields, concentrations, and source contributions of water, nitrogen, phosphorus, and sediment throughout the Midwest.
Green Lake and its tributaries: Water quality and hydrology
Green Lake is the deepest natural inland lake in Wisconsin. Through time its water quality has degraded, with relatively high phosphorus concentrations and zones of hypoxia. This project is quantifying the water quality of the lake and its tributaries, and it will provide information to help guide efforts to improve the lake.
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 decisions.
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.
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 water, nitrogen, phosphorus, and suspended sediment 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 Regression 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. Interactive, online SPARROW mapping tools allow for easy access to explore relations between human activities, natural processes, and...
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.
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.
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 quality.
Green Lake, Wisconsin and its watershed, with sampling
Map of Green Lake, Wisconsin, and its watershed, with sampling data.
Science and Products
Filter Total Items: 14
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.
SPARROW modeling: Great Lakes, Mississippi River, Ohio River, and Red River Basins
SPARROW models for the Great Lakes, Ohio River, Upper Mississippi River, and Red River Basins predict long-term mean annual loads, yields, concentrations, and source contributions of water, nitrogen, phosphorus, and sediment throughout the Midwest.
Green Lake and its tributaries: Water quality and hydrology
Green Lake is the deepest natural inland lake in Wisconsin. Through time its water quality has degraded, with relatively high phosphorus concentrations and zones of hypoxia. This project is quantifying the water quality of the lake and its tributaries, and it will provide information to help guide efforts to improve the lake.
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 decisions.
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.
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 water, nitrogen, phosphorus, and suspended sediment 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 Regression 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. Interactive, online SPARROW mapping tools allow for easy access to explore relations between human activities, natural processes, and...
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.
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.
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 quality.
Green Lake, Wisconsin and its watershed, with sampling
Map of Green Lake, Wisconsin, and its watershed, with sampling data.
Map of Green Lake, Wisconsin, and its watershed, with sampling data.