Describes the geography of rivers including their power to erode and form deltas and the formation of waterfalls, rapids, and canyons. Includes experiments and other activities.

This is a photo essay about the range of plants and animals found in fresh water throughout the year, examining the living conditions and survival mechanisms of creatures dwelling at the edge of the water, on its surface, or under the mud.

A "novel of psychological suspense about the slipperiness of the truth and a family drowning in secrets"--A single mother turns up dead at the bottom of the river that runs through town. Earlier in the summer, a vulnerable teenage girl met the same fate. They are not the first women lost to these dark waters, but their deaths disturb the river and its history, dredging up secrets long submerged. Left behind is a lonely fifteen-year-old girl. Parentless...

This policy addresses the Water Quality Control Commission's methodology and rationale for developing water temperature criteria and standards for the protection of aquatic life in Colorado's surface waters. Colorado's temperature criteria are in the process of being revised and this policy records the incremental progress towards final criteria.

Discusses the causes of ocean and river pollution and explores ways in which waters can be protected.

Water quality standards in Colorado have been developed and applied in permitting with the simplifying assumption that effluent will be fully mixed with the receiving water at or very near the point of discharge. This assumption typically is incorrect; there often is a significant mixing zone below the point of discharge. In such a case, water quality standards may be exceeded within the mixing zone, even when the effluent discharge is in full compliance...