Hydrology: Expert Reports

The division produces 60-70 reports per year. These reports are unique, authoritative expert evaluations. Each report is produced by a committee of experts selected by the Academy to address a particular statement of task and is subject to a rigorous, independent peer review. The experts who volunteer their time participating on study committees are vetted to make sure that the committee has the range of expertise needed to address the task, that they have a balance of perspectives, and to identify and eliminate members with conflicts of interest. All reports undergo a rigorous, independent peer review to assure that the statement of task has been addressed, that conclusions are adequately supported, and that all important issues raised by the reviewers are addressed. Thus, while the reports represent views of the committee, they also are endorsed by the Academy.

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Showing results 1 - 5 of 11

A Scientific Assessment of Alternatives for Reducing Water Management Effects on Threatened and Endangered Fishes in California's Bay Delta (2010)

The California Bay-Delta region receives fresh water from the Sacramento and San Joaquin rivers and their tributaries, and some of that water is diverted for agriculture and southern California metropolitan areas. However, the region's growing population and engineered water-control systems have substantially altered the delta ecosystem and have changed the composition of fish species; while some native species have declined, some introduce... More >>

Review of the St. Johns River Water Supply Impact Study: Report 2 (2009)

The St. Johns River Water Management District in east-central Florida is weighing potential effects on wetland ecosystems of a proposed withdrawal of 262 million gallons of water per day from the river for future public water supply. The District's Water Supply Impact Study draws on data and analyses from seven scientific workgroups: hydrology/hydrodynamics, wetlands, biogeochemistry, plankton, benthos, submersed aquatic vegetation, and fish. Th... More >>

Hydrology, Ecology, and Fishes of the Klamath River Basin (2008)

The Klamath River basin, which spans parts of southern Oregon and northern California, has been the focus of a prominent conflict over competing uses for water. Management actions to protect threatened and endangered fish species in the basin have left less water available for irrigation in dry years and heightened tensions among farmers and other stakeholders including commercial fishermen, Native Americans, conservationists, hunters, anglers... More >>

Report in Brief

Integrating Multiscale Observations of U.S. Waters (2008)

Water is essential to life for humans and their food crops, and for ecosystems. Effective water management requires tracking the inflow, outflow, quantity and quality of ground-water and surface water, much like balancing a bank account. Currently, networks of ground-based instruments measure these in individual locations, while airborne and satellite sensors measure them over larger areas. Recent technological innovations offer unprecedente... More >>

Report in Brief

Hydrologic Effects of a Changing Forest Landscape (2008)

Of all the resources that forests produce, water may be the most important-streamflow from forests provides two-thirds of the nation's clean water supply. Forest managers face increasing pressure to cut trees to increase water supply for human uses, especially in western states where population is rising. However, cutting trees for short term water gains does not guarantee that water will be available in dry seasons, and it can ultimatel... More >>

Report in Brief