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Optimal fish passage barrier removal – Revisited

King, S., O'Hanley, J.R. (2014) Optimal fish passage barrier removal – Revisited. River Research and Applications, . ISSN 1535-1459. E-ISSN 1535-1467. (doi:10.1002/rra.2859) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided) (KAR id:46452)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided.
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Infrastructure, such as dams, weirs and culverts, disrupt the longitudinal connectivity of rivers, causing adverse impacts on fish and other aquatic species. Improving fish passage at artificial barriers, accordingly, can be an especially effective and economical river restoration option. In this article, we propose a novel, mixed integer programing model for optimizing barrier mitigation decisions given a limited budget. Rather than simply treating barriers as being impassable or not, we consider the more general case in which barriers may be partially passable. Although this assumption normally introduces nonlinearity into the problem, we manage to formulate a linear model via the use of probability chains, a newly proposed technique from the operations research literature. Our model is noteworthy in that it can be readily implemented and solved using off-the-shelf optimization modelling software. Using a case study from the US State of Maine, we demonstrate that the model is highly efficient in comparison with existing solution methods and, moreover, highly scalable in that large problems with many thousands of barriers can still be solved optimally. Our analysis confirms that barrier mitigation can provide substantial ecological gains for migratory fish at low levels of investment.

Item Type: Article
DOI/Identification number: 10.1002/rra.2859
Uncontrolled keywords: fish passage barriers; river connectivity; probability chains; optimization; MILP
Subjects: H Social Sciences > HA Statistics > HA33 Management Science
Q Science > QH Natural history > QH75 Conservation (Biology)
Divisions: Divisions > Kent Business School - Division > Department of Analytics, Operations and Systems
Depositing User: Jesse O'Hanley
Date Deposited: 05 Jan 2015 13:21 UTC
Last Modified: 19 Sep 2023 15:04 UTC
Resource URI: (The current URI for this page, for reference purposes)

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