Streeter–Phelps equation

From Glossary of Meteorology
A mathematical model of the variation of dissolved oxygen in a stream due to a point load of waste discharge.

The waste discharge can be characterized by biochemical oxygen demand (BOD) or chemical oxygen demand (COD) and its decay coefficient. The natural aeration of the stream is also included. The equation gives the sag in the dissolved oxygen in the water as a function of the distance from the point load.
Streeter, H. W., and E. Phelps 1925. Bulletin 146. U.S. Public Health Service.

Copyright 2024 American Meteorological Society (AMS). For permission to reuse any portion of this work, please contact permissions@ametsoc.org. Any use of material in this work that is determined to be “fair use” under Section 107 of the U.S. Copyright Act (17 U.S. Code § 107) or that satisfies the conditions specified in Section 108 of the U.S.Copyright Act (17 USC § 108) does not require AMS’s permission. Republication, systematic reproduction, posting in electronic form, such as on a website or in a searchable database, or other uses of this material, except as exempted by the above statement, require written permission or a license from AMS. Additional details are provided in the AMS Copyright Policy statement.