Committee on Hydrologic Impacts of Forest Management, National Research Council Julia A. Jones vice-chair. 2008. Hydrologic effects of a changing forest landscape . Washington, DC: The National Academy of Sciences. 168 p.
Of all the outputs of forests, water may be the most important. Streamflow from forests provides two-thirds of the nation's clean water supply. Removing forest cover
accelerates the rate that precipitation becomes streamflow; therefore, in some areas, cutting trees causes a temporary increase in the volume of water flowing downstream.
This effect has spurred political pressure to cut trees to increase water supply, especially in western states where population is rising. However, cutting trees for water gains is not
sustainable: increases in flow rate and volume are typically short-lived, and the practice can ultimately degrade water qulaity and increase vulnerability to flooding. Forest
hydrology, the study of how water flows through forests, can help illuminate the connections between forests and water, but it must advance if it is to deal with today's
complexitites, including climate change, wildfires, and changing patters of development and ownership. This book identifies actions that scientists, forest and water managers,
and citizens can take to help sustain water resources from forests.