188RIVERS AND STREAMS4.10. Fifteen kilograms of a contaminant is spilled into a stream 4 m wide and 2 m deep.(a) If the average velocity in the stream is 0.8 m/s, the longitudinal dispersioncoefficient is 0.2 m/s, and the first-order decay constant of the contaminant is0.05 h-1, determine the maximum concentration in the stream at a drinking-waterintake 1 km downstream from the spill.(b) How would this concentration be affected if the decay constant is actually one-half of the estimated value?

4.10. Fifteen kilograms of a contaminant is spilled into a stream 4 m wide and 2 m deep. (a) If the average velocity in the stream is 0.8 m/s, the longitudinal dispersion coefficient is 0.2 m²/s, and the first-order decay constant of the contaminant is 0.05 h-, determine the maximum concentration in the stream at a drinking-water intake 1 km downstream from the spill. (b) How would this concentration be affected if the decay constant is actually one- half of the estimated value?

4.10. Fifteen kilograms of a contaminant is spilled into a stream 4 m wide and 2 m deep. (a) If the average velocity in the stream is 0.8 m/s, the longitudinal dispersion coefficient is 0.2 m²/s, and the first-order decay constant of the contaminant is 0.05 h-, determine the maximum concentration in the stream at a drinking-water intake 1 km downstream from the spill. (b) How would this concentration be affected if the decay constant is actually one- half of the estimated value?

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Concept explainers

Sediment transport

Sediment transport or Soil transport is the movement of solid particles, usually due to the combination of gravitational forces acting on the sediment, and the movement of the liquid at which the sediment enters. Soil erosion occurs in natural systems where the particles are sandstones (sand, rocks), mud, or clay; the liquid is air, water, or ice; and the gravitational force that works to move particles to the landing surface. Sediment transportation or soil migration due to the movement of liquids occurs in rivers, lakes, lakes, oceans, and other bodies of water as a result of currents and waves. Transportation is also caused by glaciers as they flow, and to places on earth under the influence of wind. Soil erosion due to gravity alone is possible in most sloping areas, including hills, scarves, cliffs, and the continental shelf — the continental boundary of the slope.

Question

188
RIVERS AND STREAMS
4.10. Fifteen kilograms of a contaminant is spilled into a stream 4 m wide and 2 m deep.
(a) If the average velocity in the stream is 0.8 m/s, the longitudinal dispersion
coefficient is 0.2 m/s, and the first-order decay constant of the contaminant is
0.05 h-1, determine the maximum concentration in the stream at a drinking-water
intake 1 km downstream from the spill.
(b) How would this concentration be affected if the decay constant is actually one-
half of the estimated value?

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