The entire workshop agenda is presented in Appendix A . The first part of the workshop provided tutorials in EPA water resources monitoring needs and NASA remote sensing instruments, thereby orienting the participants toward relating the two agencies activities. The remainder of the workshop was then dedicated to identifying remote sensing and advanced technologies that might be applied to EPA s specific water resource monitoring needs. These discussions occurred within Breakout Sessions that were co-moderated by EPA and NASA scientists. Water Resource Types Considered Four separate water resource categories were used to structure discussions on monitoring needs and potential remote sensing and advanced technology applications.
Residence times are highly variable according to water body size.
Watersheds, which define the land area draining into the river or lake, often also include groundwater, soil moisture, biospheric water, and atmospheric water that contribute to the rivers and lakes. In some areas, and during some seasons, snow and glaciers contribute additional sources of water. Wetlands Wetlands are a diverse group of surface water resources that are typically found at the interfaces of terrestrial and aquatic ecosystems. They are defined and delineated by the presence of certain saturated soils, specific species of water tolerant plants, and distinct periods of near-surface or surface inundation. Wetlands are often attributed with beneficial functions such as stream flow moderation, shoreline stabilization, sediment trapping and nutrient retention, and wildlife habitat.