This database provides access to discharge data from the original UNESCO river archive in a digital format for use by researchers and planners in the water sciences community. While this is a very good global resource, it does not present information on rivers in the United States. Full description.

This project examines the entire water system of an ancient city, including supply, distribution, use, and drainage. Until now, individual water system elements have been studied as archaeological objects, but infrequently subjected to analysis by such disciplines as fluids engineering and urban history. This work is part of two larger long-term studies, the first concerning the relationship between ... Full description.

This set of introductory materials outlines the basic concepts of groundwater and hydrology. Graphics with accompanying definitions explain basic hydrologic terms such as aquifer, recharge, and discharge. There are also news articles, a reading list, a questionnaire, and a quiz. Full description.

The materials presented here highlight the fact that Earth's supply of water is finite and is constantly recycled. We depend on water for drinking, washing, recreation, agriculture and industry. It controls the world's weather and sustains the natural systems above and below the earth's surface. Users can examine an illustration that shows the role played by groundwater in the hydrologic cycle and ... Full description.

Finding water for growing urban areas and agricultural use is a major problem in most regions. This site provides the user with the opportunity to examine many of the options available to communities to expand their water resources base, as well as the pros and cons of each option. Specifically, the activity focuses on the following options: dam a river and create a reservoir to store water, dig more ... Full description.

The classroom activities presented here are designed to make learning and demonstrating non-point source water pollution concepts exciting and fun. The activities may be used alone or as extensions to an existing curriculum. Concepts include the water cycle, drinking water source and treatment, groundwater and aquifers, surface water and watershed protection. A glossary and correlation to the 1994 ... Full description.

These activities explain the management of ground water resources using a balanced approach, focusing on interdependencies in the environment. All activities can be performed using readily available materials. Fact sheets, reference materials, and a glossary of terms are provided. The activities cover such topics as groundwater basics, movement of water in aquifers, recharge and discharge, how a well ... Full description.

In this activity, students build a model illustrating the water cycle, and observe the results. The site includes a materials list, instructions, and information about the water cycle. A downloadable version is available, and the activity is also available in Spanish. Full description.

As part of the GLOBE program's 2003 Teacher's Guide, this site provides information and activities related to understanding hydrology. Sections featuring protocols and activities cover collecting water samples, conducting tests such as dissolved oxygen, conductivity and salinity, modeling a local watershed, comparing local water to global data, modeling water balance and looking at how water chemistry ... Full description.

In this activity, younger students enact the process by which precipitation (rain, snow, and hail) falls on an area and becomes standing water, run-off, or groundwater. They will learn general information about precipitation processes, aquifers, and the importance of clean groundwater. Full description.