## Principles of surface water quality modeling and controlThis book teaches the fundamentals and principles which underlie the mathematical modeling techniques used to analyze the quality of surface waters. The text first provides an overview of the different bodies of water in which water quality problems need to be addressed before examining specific problems that occur across all bodies of water. |

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Results 1-3 of 85

Page 71

2.3.2 Time

assumed that, although there is complete mixing from side to side and top to

bottom in the river, there is no mixing as we proceed down the length of the river.

2.3.2 Time

**Variable**Analysis: Effect of Dispersion The preceding discussion hasassumed that, although there is complete mixing from side to side and top to

bottom in the river, there is no mixing as we proceed down the length of the river.

Page 107

3.2.1.2 Conservative Substances For a conservative

chlorides in the estuary, K = 0 and the mass balance equation is d2s ds E—2-U

— = 0 (3.10) dx2 dx 5 = 0 atx=-oc (3.10a) s = s0 at x = 0 (3.10b) with The solution

...

3.2.1.2 Conservative Substances For a conservative

**variable**such as salinity orchlorides in the estuary, K = 0 and the mass balance equation is d2s ds E—2-U

— = 0 (3.10) dx2 dx 5 = 0 atx=-oc (3.10a) s = s0 at x = 0 (3.10b) with The solution

...

Page 159

Time

discussed in Section 2.3.2.1 and illustrative examples given in Sample Problems

2.6 and 3.3 for advective-dispersive systems. Equation 2.40 presents the

temporal ...

Time

**variable**concentrations due to instantaneous inputs of mass have beendiscussed in Section 2.3.2.1 and illustrative examples given in Sample Problems

2.6 and 3.3 for advective-dispersive systems. Equation 2.40 presents the

temporal ...

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### Contents

Rivers and Streams | 29 |

Estuaries Bays and Harbors | 91 |

Lakes | 173 |

Copyright | |

8 other sections not shown

### Other editions - View all

Principles of Surface Water Quality Modeling and Control Robert V. Thomann,John A. Mueller No preview available - 1987 |

### Common terms and phrases

analysis approximately aquatic assumed average bacteria biomass calculated CBOD CBODU chemical chlorophyll coliform completely mixed constant decay rate deficit depth discharge dispersion coefficient dissolved oxygen downstream effect effluent epilimnion estimate estuary eutrophication Figure finite difference fish flow given heat Hydroscience hypolimnion increase indicated input lake lb/day load loss rate m/day mass balance maximum measured mg/C mg/l NBOD nitrification nitrogen Note nutrient organic outfall oxidation parameters particulate partition coefficient phosphorus photosynthesis phytoplankton plant point source range ratio reaeration reduced relationship respiration result river runoff salinity Sample Problem saturation sediment segment settling shown in Fig shows steady stream substance surface Table Thomann tidal Toro total phosphorus toxicant treatment upstream uptake USEPA values variable velocity vertical waste water body water column water quality water quality modeling water temperature zero zooplankton