Braided Rivers (Geological Society Special Publication 75) by J. L. Best, C. S. Bristow (editors)

By J. L. Best, C. S. Bristow (editors)

Show description

Read Online or Download Braided Rivers (Geological Society Special Publication 75) PDF

Similar rivers books

Field Guide to California Rivers (California Natural History Guides, Volume 105)

Award-winning writer, naturalist, and conservationist Tim Palmer offers the realm of California rivers during this sensible and encouraging box consultant. Loaded with tips about the place to hike, fish, canoe, kayak, and raft, it bargains an interpretive strategy that unearths geology, plant and wild lifestyles, hydrologic techniques, and different common phenomena.

Human Dimensions of Global Environmental Change: Research Pathways for the Next Decade

Committee at the Human Dimensions of world swap and Committee on worldwide switch learn, Board on Environmental switch and Society, coverage department, department of Behavioral and Social Sciences and schooling, nationwide learn Council

This booklet is extracted from a miles better record, worldwide Environmental switch: learn Pathways for the subsequent Decade, which addresses the complete diversity of the clinical concerns pertaining to worldwide environmental swap and provides assistance to the clinical attempt on those concerns within the usa. This quantity involves bankruptcy 7 of that record, ''Human Dimensions of worldwide Environmental Change,'' which was once written for the record via the Committee at the Human Dimensions of worldwide switch of the nationwide study Council (NRC). It presents findings and conclusions at the key medical questions in human dimensions study, the teachings which were realized during the last decade, and the examine imperatives for international swap learn funded from the U.S..

Applied Thermodynamics for Meteorologists

This textbook on atmospheric thermodynamics is for college kids of meteorology or atmospheric technology. It additionally serves as a reference textual content for operating execs in meteorology and climate forecasting. it really is distinct since it offers whole, calculus-based derivations of uncomplicated physics from first ideas, and connects mathematical relationships to real-world, functional climate forecasting purposes.

Extra info for Braided Rivers (Geological Society Special Publication 75)

Example text

However, as demonstrated below, discharge variability does influence the detail of sediment transport, erosion and deposition in braided rivers and all other alluvial river types. Discharge, slope, b e d material size a n d s e d i m e n t transport rate Discriminators between unbraided and braided rivers of the form S = aQ -b (see Table 2) have been interpreted to represent a constant value of a hydraulic property at the channel pattern threshold. e. 0 for stream power per unit channel length (Antropovskiy 1972; Ferguson 1981, 1984, 1987; Begin 1981; Begin & Schumm 1984; Carson 1984a).

Curved flow around any type of channel bar results in a flowtransverse component of water surface slope towards the inner, convex bank, a spiral flow pattern, and convective accelerations and decelerations of the depth-averaged flow. The spiral flow pattern arises primarily because of an inbalance through the flow depth of curvatureinduced centrifugal forces and the pressure gradient associated with the transverse-sloping water surface. The convective accelerations and decelerations are associated with spatiallyvarying bed topography and channel curvature and, to a lesser extent, with the spiral flow.

The anomaly is probably based on Chang's criterion for braiding which is that an increase in S is associated with a large increase in w/d. Remarkably, however, Chang's (1985) region boundaries are lines of approximately equal w/d, and the middle of region (3) (which apparently marks the transition from meandering to braided rivers) has a w/d of 50 which is in close agreement with Fredsoe's (1978) criterion for braiding. Thus, if the discrimination between channel patterns is essentially in terms of w/d (as suggested by other theories) then the crux of the issue is finding out what independent variables control w and d.

Download PDF sample

Rated 4.80 of 5 – based on 17 votes