Effectiveness of large woody debris in stream rehabilitation projects in urban basins
نویسندگان
چکیده
منابع مشابه
Design Considerations for Large Woody Debris Placement in Stream Enhancement Projects
Absrract.-Log length exerted a critical influence in stabilizing large woody debris (LWD) pieces added as an experimental stream restoration technique. Logs longer than the average bank-full channel width (5.5 m) were significantly less likely to be displaced than logs shorter than this width. The longest log in stable log groups was significantly longer than the longest log in unstable groups....
متن کاملLarge Woody Debris in Urban Streams of the Pacific Northwest
Large woody debris (LWD) performs key functions in undisturbed streams that drain lowland forested watersheds, including dissipation of flow energy, stabilization of bedforms and channel banks, entrapment of sediment, and formation of pools. These functions vary between individual channels, however, depending on the size and morphology of the stream, which in turn depend on climate, watershed s...
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Large woody debris (LWD) was added as an experimental stream restoration technique in two streams in southwest Virginia. Additions were designed to compare human judgement in log placements against a randomized design and an unmanipulated reach, &d also to compare effectiveness in a lowand a high-gradient stream. Pool area increased 146% in the systematic placement and 32% in the random placeme...
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One of the risks distinguishes urban projects from other projects is to purchase of property obstacles. The matter is of more significance in large projects. Issues with regard to possessing property obstacles, lack of accurate layout drawings for underground facilities and following probable changes in designs make it vital to have specific studies on risk management of such projects. So thi...
متن کاملWoody debris
1. Maximum rate of cut that would provide a hillslope landslide rate of <20% over background, assuming no areas are protected by no-cut buffers .. Summary Downstream impacts to aquatic environments and property generally occur as cumulative watershed impacts, which are usually caused by changes in the transport of woody debris, water, and sediment through a watershed. The downstream cumulative ...
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ژورنال
عنوان ژورنال: Ecological Engineering
سال: 2001
ISSN: 0925-8574
DOI: 10.1016/s0925-8574(01)00079-9