By Stephen Darby
River recovery initiatives are designed to recreate sensible features inside a context of actual balance. they generally tend to target the advance and alertness of geomorphic rules for river recovery layout. because of varied versions acquiring varied effects at the related challenge, incomplete or absent info, and climatic/social/cultural adjustments, the designers and executives of such initiatives usually face excessive degrees of uncertainty.
This booklet will supply a scientific evaluate of the problems excited about minimizing and dealing with uncertainty in river recovery tasks. a chain of thematic sections should be used to outline a number of the assets of uncertainty in recovery initiatives and the way those convey at diversified issues within the existence cycle (design, building and post-construction stages) of recovery initiatives. The constitution of the ebook will supply a rational theoretical research of the matter whereas offering useful information in coping with the various resources of uncertainty. a variety of case reviews might be integrated from Europe, North the US and Australasia
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Extra info for River Restoration: Managing the Uncertainty in Restoring Physical Habitat
Example text
Select a historical reference condition for the site of interest on the basis of historical analysis (time for space substitution). • Create a reference condition on the basis of theoretical models (either conceptual or mathematical). In referring to these analogue conditions, is the desired form or the desired process then mimicked? This seems to be the point of departure for opinions within the restoration literature. , 2004). , 2004a). , 2004c). , 2003; Wissmar and Beschta, 1998). g. channel realignment, levee removal, instream habitat structures).
Admission of biases by the researcher, usually in the form of a brief disclosure that clearly defines the schools of thought and experience of the researcher, enhances the professionalism of the investigator and fairly discloses to the consumer the background of the knowledge that forms the basis of decisions pertaining to public resources. In unusual cases, critics may contest decisions in administrative hearings or in court proceedings, two venues where biases are likely to be revealed and explored in a combative environment.
Similar to Shields et al. (2003), ‘river restoration’ in this book is used as a catch-all term for a variety of management responses and activities used to address perceived problems with rivers (Kondolf, 1996). 2. 1 Motives for Restoration Once river restoration projects gain momentum, it is easy to lose sight of why they were originally envisioned (Stewardson and Rutherfurd, see Chapter 5). e. the ‘why’ instead of the ‘what’). Eight common types of motives for river restoration (still others exist) are listed below: 1.