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Environmental FlowsSaving Rivers in the Third Millennium$
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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

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PRINTED FROM CALIFORNIA SCHOLARSHIP ONLINE (www.california.universitypressscholarship.com). (c) Copyright University of California Press, 2021. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in CALSO for personal use.date: 17 September 2021

Effects of Catchment Change and River-Corridor Engineering

Effects of Catchment Change and River-Corridor Engineering

(p.74) (p.75) 5 Effects of Catchment Change and River-Corridor Engineering
Environmental Flows

Angela H. Arthington

University of California Press

Every environmental flow assessment has a catchment context with a particular “human footprint.” Human transformation of the global water cycle inevitably impacts receiving aquatic ecosystems both directly, through interference with hydrologic processes, and indirectly, through widespread land-cover change, coupled with the engineering of river channels, wetland drainage, and pollution. Modifications to the natural functioning of catchments and aquatic ecosystems can be distilled down to five interacting threat categories: flow modification, water pollution, habitat loss, invasion by exotic species, and overexploitation. A rich litany of examples adds weight to the proposition that environmental flow assessments and water management may be ineffective in isolation from efforts to mitigate other threats within a catchment through an integrated management of land and water resources.

Keywords:   catchment change, river corridor engineering, flow modification, wetland drainage, habitat loss, pollution, exotic species, overexploitation, integrated management

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