Some Basics on Hydrology and Water

Hydrology primer from U.S. Geological Survey
Water science for schools
Environment Canada Water Page
NASA's Observatorium - the Hydrologic Cycle
The Earth's Water Budget
Global Hydrology and Climate Center
Continental-scale experiment: Mississippi basin hydrology
NASA Tropical rainfall measuring mission
Comparison of land and ocean storms
World water balance - comparison of continents (table)
Water balance in major river basins of the world
River routing in the global water cycle
Digital atlas of the world water balance - 1997
Digital atlas of the world water balance - 1998
Digital atlas of the world water balance - 1999
Global river discharge database
Water resources of the U.S.
United States Surface-Water Data Retrieval
Drought (from U.S. Geological Survey)
Human Impacts on the Global Water Cycle
Soil-water relationships
Soil-water budget
USGS National Hydrography Dataset

Groundwater and aquifer studies

Basic groundwater hydrology
U.S. Geological Survey groundwater studies
U.S.G.S. Groundwater Atlas of the U.S.
 - segment on California and Nevada
(some excellent material here!)
Edwards Aquifer Information Page
Edwards Aquifer Research and Data Center
U.S.G.S. Online resources for Edwards Aquifer
Water-Level Changes in the High Plains Aquifer, Predevelopment to 1994
High Plains Aquifer Resources and Information
Artesian aquifers and the effects of pumping
Missouri River Alluvial Aquifer Ground-Water Protection
Are Farmers Contaminating the Shallow Ground Water?
Ground-Water Flow Study in the Vicinity of the Savannah River Site, South Carolina and Georgia
 The Hydrogeologist's Home Page
Recent advances in understanding the interaction of groundwater and surface water

Solution features and karst topography

Karst landscapes
The Virtual Cave
Karst links
Physical geology tutor - karst features
Canadian cave and karst information server
Karst in British Columbia
Karst topography in Kentucky
Mammoth Cave National Park
Missouri caves, karst, and springs
Florida karst topography
Carlsbad Caverns, New Mexico
Tower karst in China
    another picture of tower karst
    and another...

Water Resources and watershed studies

Water Use in the United States

EPA Surf your watershed
The Suwannee River Basin Pilot Study:  Issues for Watershed Management in Florida

Individual Watershed Studies around the World (not all equally useful, though)

African Water Page

Monitoring and Research Activities in the Goodwin Creek Experimental Watershed (Mississippi)
Walnut Gulch Experimental Watershed (Arizona)

The Mississippi River:

"Old Man River" tour
Upper Mississippi River Basin Cartographic Products
Contaminants in the Mississippi River, 1987-92
Arizona Water Issues Summary
Verde River Watershed

Water Resources of California
California Rivers Assessment

National Water-Quality Assessment (NAWQA) Program South Platte River Basin Study

World Rivers Project
Spatial water balance of Texas
 

South Florida ecosystem

Effects of El Niño on Streamflow, Lake Level, and Landslide Potential

Floods

Floods and flood plains
Statewide floods in Pennsylvania, January 1996
Northern California Storms and Floods of January 1995
Assessing the 1993 flood on the upper Mississippi River Basin
Landsat Imagery of the 1993 Mississippi River Flood
Corps of Engineers 1993 Flood Data
Upper Mississippi River Basin Cartographic Products
Dartmouth Flood Observatory

Lake Studies

 Lake Baikal
Aral Sea
The Aral Sea Area Desertification Change-Detection Study
Aral Sea GIS

Colorado River in Grand Canyon

Grand Canyon Monitoring and Research Center
Controlled Flooding of the Colorado River in Grand Canyon
Controlled Flooding of the Colorado River in Grand Canyon: the Rationale and Data-Collection Planned
Grand Canyon Studies:Using Ocean-Research Techniques to Study a River System
Can Large Releases of Water Restore Habitats in Grand Canyon?
Studies of Colorado River Sandbars (Beaches) in Grand Canyon at Northern Arizona University
Earlier version of the NAU Sandbar Study web page with background info