mebine_river.pdf (197.68 kB)
Effects of contaminant decay on the diffusion centre of a river
preprint
posted on 2005-07-22, 14:28 authored by P. Mebine, Ron SmithMany contaminants exhibit decay (radioactive decay, consumed by bacteria, heat
loss or evaporation through the surface, dissolution by turbulence). For a non-symmetric
river with non-reversing flow, the effects of decay are allowed for in specifying the diffusion
centre i.e. the optimal postion for a steady discharge. Three families of exact
solutions are presented that illustrate the effect on the diffusion centre of cross-channel
variation in the decay (uniform, decreasing or increasing with depth). The diffusion
centre is shifted to deeper or to shallower water accordingly as the temporal decay
divided by flow speed decreases or increases with water depth.
History
School
- Science
Department
- Mathematical Sciences
Pages
202420 bytesPublication date
2004Notes
This is a pre-print.Language
- en