Survey Of The Columbia River And Its Tributaries Vol 3 Classic Reprint PDF Download

Excerpt from Survey of the Columbia River and Its Tributaries, Vol. 3 Many of the watersheds were completely logged off long ago and as a result stream flows are usually much smaller and water temperatures much higher than formerly during the summer and fall months. Therefore, the stream Spawning capacities are smaller than formerly. However, an extensive regrowth of timber and brush on the deforested slopes should result in some improvement of stream spawning conditions in the future. Practically all of the tributaries originally supported capacity runs of salmon, principally fall Chinook, silver and chum salmon. There were also good runs of steelhead and sea-run cutthroat trout. Despite the harmful effects resulting from logging operations, the encroachment of civilization, and a certain amount of overfishing, the streams still maintain a sufficient nucleus of fish and still have sufficient poten tial value to warrant their rehabilitation. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.