Selasa, 25 Oktober 2011

HOW DO FORESTS AFFECT OUR DRINKING WATER ?

Clean water is one of life’s basic necessities. Healthy forests promote soils that provide natural filtration, to keep streams clean and water quality high.


CASE STUDY : OREGON, USA
Most of Oregon’s municipal water systems use water that originates from forestlands, including those that are managed for wood production. The quality of this source water is among the best in the nation.

WHAT IS A WATERSHED ?
A watershed is an area of land that absorbs rain and snow and drains it through a network of streams into a river or other major water body. All land in Oregon is within one watershed or another. Watershed boundaries can be generally identified by mountains and ridges that divide the drainage areas for different water bodies.

 



HOW DOES THE WATER CYCLE WORK ?
As the water reaches healthy forest soils, most are absorbed and, over time, 
are released to nearby streams or groundwater aquifers, filtering it in the process.


source : www.oregonforests.org

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