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51.
Gregory KJ 《Environmental management》2002,29(5):620-633
The impact of urbanization on stream channels has been investigated in a range of areas; the degree and extent of the channel
adjustments have been demonstrated; and for a few areas these characteristics have recently been placed into a spatial context.
A method of rapid field survey for depicting the channel network of urban areas in terms of near natural, adjusted, and channelized
systems is illustrated for the urban area of Armidale NSW, for which Armidale Dumaresq Council had prepared a stormwater management
plan. Such a survey could enable channel characteristics and adjustments, as well as water quantity and quality, to be included
in the management plan. Possible options for management to address are suggested for each of the channel categories. A channel
classification system of the kind suggested can provide a basic complement for the further development of the stormwater management
plan, can afford a basis for specifying management alternatives, and can be helpful in demonstrating the options offered for
community consultation. 相似文献
52.
Massimo Rinaldi Peggy A. Johnson 《Journal of the American Water Resources Association》1997,33(4):855-866
ABSTRACT: Stream meander restoration designs currently used by many state and local government agencies are often based on empirical equations, such as those developed by Leopold and Wolman (1957; 1960). In order to assess the suitability of these equations and propose alternative strategies, 18 sites in Central Maryland were selected and data on channel planform, cross-sections, sediments, and spacing and sizing of the pools and riffles were collected and analyzed to characterize the channel type in the study area. A large bias was found comparing the meander parameters measured to those computed using the Leopold and Wolman equations for the streams in central Maryland. Based on these results, appropriate empirical equations for the study area that can assist in stream restoration designs were investigated. An additional approach that can assist in stream restoration consists of the application of a detailed stream reconnaissance to verify that the restoration project is consistent with the natural form and processes of the river. 相似文献