This site uses a picture of a covered swimming pool as an example of a watershed and describes real-world watersheds and their processes, including precipitation, infiltration, evaporation, transpiration, and storage. Links to an interactive rainfall calculator and to related websites are included. Full description.

This site provides a discussion of the downward movement, or infiltration, of water from the surface into soil or porous rock. Graphics illustrate the processes affecting infiltration, including precipitation, soil characteristics and saturation, land cover, slope, and evapotranspiration. Links to additional sources of information are also provided. Full description.

This United States Geological Survey site focuses on water and its properties. The site contains activities for teachers and students, along with pictures, data, maps, and an interactive center where users can give opinions and test their water knowledge. Unique aspects of this site include the sections that contain student work and a picture gallery. There are links to other resources for students, ... Full description.

Students participate in two interactive exercises designed to help the user learn about river processes like discharge, flooding, and flood frequency. Each activity requires a person to make careful observations and measurements, do simple calculations, and answer questions about his or her work. A Certificate of Completion is available for printing at the end of each activity. 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.

This report discusses how natural processes and human activities affect the interactions of ground water and surface water, and the importance of considering ground water and surface water as a single resource. Topics include natural processes of ground- and surface-water interaction; chemical interactions; and the effect of landscapes on these interactions. There is also discussion of the effects ... Full description.

This activity prepares you to launch an investigation of the relationship between precipitation and streamflow for a local watershed. It can enrich a study of the water cycle. Following the step-by-step instructions in a case study you will locate, download, format, and finally graph one year of Web-based data for these two variables. The graph highlights the details of this often complex precipitation-streamflow ... Full description.

This activity allows students to better understand aquifers and the issues of climate, spring flow, environmental protection, and water use. The activity centers around a constructed ground-water system and contains vocabulary, materials, procedures for two labs, data sheets and information on analyzing the data. Full description.

This site provides tabular and graphical information on both tidal height and current strength for a wide variety of locations on both the Pacific and Atlantic coasts of the Americas, as well as most islands in those two oceans. The user first selects a region and then from that page selects a site for which to generate predictions. There is a form for customized predictions which allows the user ... Full description.

In this module, students carry out a number of activities that demonstrate the concepts of evaporation, condensation, precipitation, and soil moisture and runoff. The students then construct a terrarium as a way to observe the water cycle as a whole. Immediately following this, students use the Internet to acquire Real Time Data from the Olympic Peninsula in Washington which they can then use to describe ... Full description.