"It is too bad that our government fails to address or talk about the adverse effects of watershed logging from a real scientific perspective.
The real problems are:
1) logging is well known to increase peak runoffs (mainly because of decreased evapotransiration) and thereby increasing water turbidity making disinfection more difficult as organisms are able to "hide" in the particulates. When using chlorine, increasing turbidity increases the production of trihalomethanes and other carcinogens. There is an accepted link between chlorination and bladder cancer.
2) logging roads increase human access which is a well known risk to watersheds used for human consumption. This is why Seattle, Vancouver, and Portland legally prohibit public tresspass into their watersheds.
3) logging causes compaction of the soils and so that the forest floor no longer absorbs and filters water as it does in an undisturbed area. Roads where compaction is worst, are used for travel by animals and people which often leave their wastes which now wash off the road unfiltered, into a culvert and directly into drinking water sources."
Dr Lee Hutton, Pathologist, Nelson
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