Puerto Rico; humedales [Puerto Rico; wetlands]

Hydrogeology and potential effects of changes in water use, Carson Desert agricultural area, Churchill County, Nevada

Effect of seasonal and long-term changes in stress on sources of water to wells

Effects of the eruptions of Mount St. Helens on physical, chemical, and biological characteristics of surface water, ground water, and precipitation in the Western United States

Streamflow transport of radionuclides and other chemical constituents in the Puerco and the Little Colorado river basins, Arizona and New Mexico

Geochemical and hydrologic controls on phosphorus transport in a sewage-contaminated sand and gravel aquifer near Ashumet Pond, Cape Cod, Massachusetts

Sources and transport of phosphorus and nitrogen during low-flow conditions in the Tualatin River, Oregon, 1991-93

Numerical simulation of a plume of brackish water in the Biscayne Aquifer originating from a flowing artesian well, Dade County, Florida

Simulation of the soil water balance of an undeveloped prairie in west-central Florida

Effects of uranium-mining releases on ground-water quality in the Puerco River Basin, Arizona and New Mexico

Aquatic biology of the San Joaquin-Tulare basins, California; analysis of available data through 1992

Numerical model analysis of the effects of ground-water withdrawals on discharge to streams and springs in small basins typical of the Puget Sound lowland, Washington

Riparian-vegetation controls on the spatial pattern of stream-channel instability, Little Piney Creek, Missouri

Summary of floods in the United States, January 1992 through September 1993

STATUS AND TRENDS OF THE NATION'S BIOLOGICAL RESOURCES VOL 1 AND 2