View of Hoover Dam and Lake Mead from the Mike O'Callaghan–Pat Tillman Memorial Bridge (Colorado River Bridge).
Michael R. Rosen (Former Employee)
Science and Products
Selenium Cycling in Salton Sea Wetlands
The effect of selenium toxicity on wildlife has been known for more than 50 years. This issue drew particular attention in the 1980s when embryo deformity and mortality was observed in birds at a wildlife refuge in California. Harmful effects from selenium were determined to be connected to irrigation drainage water. As a result, an effort began to monitor levels of selenium in irrigation drainage...
How are Endocrine-Disrupting Compounds Moving Through the Food Web in Lake Mead National Recreation Area?
Water quality in the Lake Mead National Recreation Area (LAKE), particularly Las Vegas Bay, is affected by water coming from the Las Vegas Wash, an urban perennial stream whose water is comprised of treated wastewater and urban runoff coming from the Las Vegas metropolitan area. Common carp collected from Las Vegas Wash and Las Vegas Bay and largemouth bass collected from Las Vegas Bay have...
Groundwater Quality in Principal Aquifers of the United States, 1991—2010
A new U.S. Geological Survey (USGS) report summarizes the major findings of national and regional assessments of groundwater quality in 40 Principal Aquifers in the United States. Knowledge of contaminant occurrence and the factors that control contaminant concentrations can ensure the availability and quality of this vital natural resource in the future.
Hoover Dam and Lake Mead
View of Hoover Dam and Lake Mead from the Mike O'Callaghan–Pat Tillman Memorial Bridge (Colorado River Bridge).
Sampling Fish
Scientist sampling fish at Lake Mead.
Scientist sampling fish at Lake Mead.
Carson Valley
View of Carson Valley looking west to the Sierra Nevada Mountains. The houses in the distance use a septic system for waste disposal and a domestic well for water supply.
View of Carson Valley looking west to the Sierra Nevada Mountains. The houses in the distance use a septic system for waste disposal and a domestic well for water supply.
Science and Products
Selenium Cycling in Salton Sea Wetlands
The effect of selenium toxicity on wildlife has been known for more than 50 years. This issue drew particular attention in the 1980s when embryo deformity and mortality was observed in birds at a wildlife refuge in California. Harmful effects from selenium were determined to be connected to irrigation drainage water. As a result, an effort began to monitor levels of selenium in irrigation drainage...
How are Endocrine-Disrupting Compounds Moving Through the Food Web in Lake Mead National Recreation Area?
Water quality in the Lake Mead National Recreation Area (LAKE), particularly Las Vegas Bay, is affected by water coming from the Las Vegas Wash, an urban perennial stream whose water is comprised of treated wastewater and urban runoff coming from the Las Vegas metropolitan area. Common carp collected from Las Vegas Wash and Las Vegas Bay and largemouth bass collected from Las Vegas Bay have...
Groundwater Quality in Principal Aquifers of the United States, 1991—2010
A new U.S. Geological Survey (USGS) report summarizes the major findings of national and regional assessments of groundwater quality in 40 Principal Aquifers in the United States. Knowledge of contaminant occurrence and the factors that control contaminant concentrations can ensure the availability and quality of this vital natural resource in the future.
Hoover Dam and Lake Mead
View of Hoover Dam and Lake Mead from the Mike O'Callaghan–Pat Tillman Memorial Bridge (Colorado River Bridge).
View of Hoover Dam and Lake Mead from the Mike O'Callaghan–Pat Tillman Memorial Bridge (Colorado River Bridge).
Sampling Fish
Scientist sampling fish at Lake Mead.
Scientist sampling fish at Lake Mead.
Carson Valley
View of Carson Valley looking west to the Sierra Nevada Mountains. The houses in the distance use a septic system for waste disposal and a domestic well for water supply.
View of Carson Valley looking west to the Sierra Nevada Mountains. The houses in the distance use a septic system for waste disposal and a domestic well for water supply.