Managing the Columbia River 在線電子書 pdf 下載 txt下載 epub 下載 mobi 下載 2024


Managing the Columbia River

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Not Available (NA) 作者
Natl Academy Pr
譯者
2004-7 出版日期
268 頁數
$ 39.55 價格
HRD
叢書系列
9780309091558 圖書編碼

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Managing the Columbia River 在線電子書 epub 下載 mobi 下載 pdf 下載 txt 下載 2024

Managing the Columbia River 在線電子書 epub 下載 pdf 下載 mobi 下載 txt 下載 2024

Managing the Columbia River 在線電子書 pdf 下載 txt下載 epub 下載 mobi 下載 2024



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Managing the Columbia River 在線電子書 pdf 下載 txt下載 epub 下載 mobi 在線電子書下載

Managing the Columbia River 在線電子書 圖書描述

Flows of the Columbia River, although modified substantially during the twentieth century, still vary considerably between seasons and between years. Lowest flows tend to occur during summer months when demand for irrigation water is at its highest and when water temperatures are greatest. These periods of low flows, high demand, and high temperature are critical periods for juvenile salmon migrating downstream through the Columbia River hydropower system. Although impacts on salmon of any individual water withdrawal may be small, the cumulative effects of numerous withdrawals will affect Columbia River flows and would pose increased risks to salmon survival. The body of scientific knowledge explaining salmon migratory behavior and physiology is substantial, but imperfect, and decision makers should acknowledge this and be willing to take action in the face of uncertainities. In order to provide a more comprehensive water permitting process, the State of Washington, Canada, other basin states, and tribal groups should establish a basin-wide forum to consider future water withdrawal application permits. If the State of Washington issues additional permits for water withdrawals from the Columbia River, those permits should contain provisions that allow withdrawals to be curtailed during critical high-demand periods.

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