Long-term consequences of upstream impoundment

Petts, Geoffrey E. (1980) Long-term consequences of upstream impoundment. Environmental Conservation, 7 (4). pp. 325-332. ISSN 0376-8929

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Official URL: http://dx.doi.org/10.1017/S0376892900008183


Since 1970 a large number of environmental problems have been identified as resulting from the long-term effects of human impacts. Consideration of human activity within the environment as three orders of impact, provides a basic framework for the appreciation and evaluation of long-term problems. Consequent upon dam construction, major changes of flood magnitude and frequency and of the quantity and calibre of sediment loads (first-order impacts), will induce the readjustment of channel morphology and ecology (second-order impacts). However, the macrophytic and macro-invertebrate population, for example, are also adjusted to channel morphology—particularly channel shape and substrate composition—so that further readjustments of the macrophyte and macro-invertebrate populations may be effected by changes of channel form (third-order impacts).

Item Type:Article
Research Community:University of Westminster > Life Sciences, School of
ID Code:9149
Deposited On:17 Feb 2011 12:20
Last Modified:17 Feb 2011 12:20

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