One-dimensional steady-state stream water-quality model

Water-Resources Investigations Report 79-45
By: , and 



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.

Additional publication details

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.
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