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Quantitative generalizations for catchment sediment yield following forest logging

Lookup NU author(s): Dr James Bathurst

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Abstract

Published data for temperate forests across the world are analyzed to investigate the potential for generalized quantitative expressions of catchment sediment yield impact in the years immediately following logging. Such generalizations would be useful in a variety of forestry and engineering tasks and would aid the spread of knowledge amongst both relevant professionals and new students. Data were assembled for paired catchment studies (51 catchments including 16 controls) that enabled the postlogging sediment yield impact to be compared with both the prelogging period and an undisturbed control catchment, using a specially defined relative response factor. Three categories of impact were derived: low-moderate, high, and very high, defined by specific ranges in the maximum value of the relative response factor. The maximum increase in specific sediment yield (in t km(-2) yr(-1)) following logging is 1 order of magnitude above the control sediment yield at both the annual and storm event scales, at least under normal circumstances of Best Management Practice. There is no apparent relationship between sediment yield and the proportion of catchment logged, at least at the general scale. A cumulative probability distribution for the year in which the maximum postlogging sediment yield occurs, shows the majority of cases falling in the first 2 years. These generalizations refer to the broad response to logging as a function of ground disturbance, for example, by logging technique, roads, and burning. Although limited to order of magnitude quantification, they provide a basis for first estimates and for a general appreciation of an impact problem.


Publication metadata

Author(s): Bathurst JC, Iroume A

Publication type: Article

Publication status: Published

Journal: Water Resources Research

Year: 2014

Volume: 50

Issue: 11

Pages: 8383-8402

Print publication date: 04/11/2014

Online publication date: 04/11/2014

Acceptance date: 09/09/2014

ISSN (print): 0043-1397

ISSN (electronic): 1944-7973

Publisher: American Geophysical Union

URL: http://dx.doi.org/10.1002/2014WR015711

DOI: 10.1002/2014WR015711


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