Dam Removal Requirements, Process, and Techniques United States Environmental Protection Agency (EPA) guide to dam removal. July, 2007. Chapter 9 of the National Management Measures to Control Nonpoint Source Pollution from Hydromodification. The full document is available Here
The EPA's Water Sense Program encourages the use of water-conserving appliances in new homes and has a system of labels that demonstrate good water effciency for toilets, appliances, etc.
Fluvial Geomorphology is the study of how a river changes and moves through its life. In this presentation, Dr. David T. Williams, Ph.D., P.E., of David T. Williams and Associates, Engineers, does a fantastic job of explaining how a river works.