Environmental Engineering

The Wetlands Handbook by Edward Maltby, Tom Barker

By Edward Maltby, Tom Barker

Forty-two chapters via overseas specialists from a variety of disciplines make The Wetlands Handbook the fundamental device for these looking complete knowing of the topic. A departure from extra conventional treatises, this article examines freshwater wetland surroundings technological know-how from the basics to problems with administration and policy.

Introductory chapters handle the scope and importance of wetlands globally for groups, tradition and biodiversity. next sections take care of strategies underpinning wetland functioning, how wetlands paintings, their makes use of and values for people and nature, their sensitivity to exterior affects, and the way they're restored. The textual content is illustrated by means of quite a few examples, emphasising useful and holistic ways to wetland administration, together with case stories at the clever use and rehabilitation of wetlands in farmed, city, business and different broken environments, highlighting the long term advantages of a number of use. The Wetlands Handbook will offer a useful reference for researchers, managers, policy-makers and scholars of wetland sciences

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A wetland should be considered internationally important if it is a particularly good example of a specific type of wetland characteristic of its region. 3. Criteria for representative or unique wetlands. A wetland should be considered internationally important: • if it is a particularly good representative example of a natural or near-natural wetland, characteristic of the appropriate biogeographical region; or • if it is a particularly good representative example of a natural or near-natural wetland, common to more than one biogeographical region; or • if it is a particularly good representative example of a wetland, which plays a substantial hydrological, biological or ecological role in the natural functioning of a major river basin or coastal system, especially when it is located in a transborder position; or • if it is an example of a specific type of wetland, rare or unusual in the appropriate biogeographical region.

First statistical wetlands status and trends report estimates rate of wetland loss mid 1950s to mid 1970s at 185 400 ha a−1 Second report. Update for period mid 1970s to mid 1980s estimates rate of loss declined to 117 400 ha a−1 Third Report covering 1986–1997 estimates rate of loss reduced further to 23 700 ha a−1 Fourth Report covering1998–2004 estimates gain overall in wetlands of 12 900 ha a−1 but still an overall loss of freshwater emergent marshes of 57 720 ha for the period. 10). Much of this has taken place on both active and inactive agricultural land (Dahl 2006).

The multifunctional benefits that arise from the often rapid and dramatic alternation of wet and dry conditions are significant for wildlife, but also provide the basis for the sustainable economies of many human populations; however, with increasing frequency the ‘natural’ hydrology is threatened by dams and irrigation projects. In an analysis of seven case studies covering more than a third of all floodplains in Africa, Drijver and Marchand (1985) concluded that, ‘notwithstanding the possible impact of water management projects, the negligence of ecological side-effects generally means a deterioration of environmental quality at the expense of the existing economic situation for the local people and of the natural conservation values.

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