Jump to ContentJump to Main Navigation
Environmental FlowsSaving Rivers in the Third Millennium$
Users without a subscription are not able to see the full content.

Angela H. Arthington

Print publication date: 2012

Print ISBN-13: 9780520273696

Published to California Scholarship Online: May 2013

DOI: 10.1525/california/9780520273696.001.0001

Show Summary Details
Page of

PRINTED FROM CALIFORNIA SCHOLARSHIP ONLINE (www.california.universitypressscholarship.com). (c) Copyright University of California Press, 2019. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in CALSO for personal use.date: 22 October 2019

Effects of Dams on Sediment, Thermal, and Chemical regimes

Effects of Dams on Sediment, Thermal, and Chemical regimes

Chapter:
(p.99) 7 Effects of Dams on Sediment, Thermal, and Chemical regimes
Source:
Environmental Flows
Author(s):

Angela H. Arthington

Publisher:
University of California Press
DOI:10.1525/california/9780520273696.003.0007

Dams store and release water in different ways depending upon the climatic and catchment setting, purpose, design, and mode of operation. These factors influence the impact of a dam on sediment, thermal, and chemical regimes downstream of the impoundment. Storage of floodwaters and high flows deprives the river below a dam of “flushing flows” that would normally flush out accumulated sediments and rejuvenate stream habitat. Vertically stratified impoundments release deep cold water, which is often oxygen deficient as well as colder than normal stream water. Alterations to the volume, frequency, duration, and timing of floods directly affect nitrogen cycling in alluvial soils by controlling the duration of inundation and of aerobic and anaerobic phases. These changes impact severely on aquatic biota.

Keywords:   dams, mode of operation, flushing flows, accumulated sediment, cold water, oxygen deficiency, nitrogen cycling

California Scholarship Online requires a subscription or purchase to access the full text of books within the service. Public users can however freely search the site and view the abstracts and keywords for each book and chapter.

Please, subscribe or login to access full text content.

If you think you should have access to this title, please contact your librarian.

To troubleshoot, please check our FAQs, and if you can't find the answer there, please contact us.