One-dimensional steady-state stream water-quality model
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Abstract
A computer program, based on a one-dimensional mathematical model which predicts the stream water-quality response characteristics from waste source inputs, is described and documented. Variables predicted include dissolved oxygen, biochemical oxygen demand, nitrogen forms, total and fecal-coliform bacteria, orthophosphate-phosphorus, and various conservative substances. The model is based primarily on the well known Streeter-Phelps oxygen-sag equation. Special options of the program include the capability of handling nonpoint source waste inputs and anoxic conditions.
The model formulation is based on a steady-state assumption which requires constant flow rate of waste and stream discharges and associated parameters. To achieve a problem solution, each reach of a stream system is broken into a given number of subreaches, generally defined by locations of waste or tributary inflow points. All waste constituents are assumed to be completely mixed within any cross section.
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | One-dimensional steady-state stream water-quality model |
| Series title | Water-Resources Investigations Report |
| Series number | 79-45 |
| DOI | 10.3133/wri7945 |
| Year Published | 1979 |
| Language | English |
| Publisher | U.S. Geological Survey |
| Description | iv, 215 p. |