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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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Ecological Limits Of Hydrologic Alterations (Eloha)

Ecological Limits Of Hydrologic Alterations (Eloha)

(p.181) 13 Ecological Limits Of Hydrologic Alterations (Eloha)
Environmental Flows

Angela H. Arthington

University of California Press

The ELOHA framework aims to develop quantitative relationships between flow regime alteration and ecological response by testing plausible hypotheses derived from hydro-ecological literature and professional knowledge. In this methodology, the rivers of a user-defined geographic region are classified into a few distinctive flow regime types that are expected to have different ecological characteristics. Flow alteration-ecological response relationships are developed for each river type, based on a combination of existing hydro-ecological literature, field studies across gradients of hydrologic alteration, and expert knowledge. The ELOHA framework proceeds within an adaptive management context in which the objective is to formalize ongoing collection of monitoring data, or targeted field sampling, to test and fine-tune the hypothesized flow alteration-ecological response relationships.

Keywords:   flow regime classification, gradients of hydrologic alteration, ecological responses, functional relationships, adaptive management

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