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A Computer Program Simulation of the Effect of Upstream Agricultural Practices on the Survival of Salmonid Embryos

by J. Garbrecht, USDA, Fort Collins, CO, USA,
F. D. Theurer, USDA, Fort Collins, CO, USA,



Document Type: Proceeding Paper

Part of: Water Forum '86: World Water Issues in Evolution

Abstract:

A physical-process based computer program was developed to quantify the cause and effect relationship between the survival of salmonid embryo and upstream agricultural practices. The impact of land use, land management, and soil and water conservation alternatives on the spawning and incubation environment of the salmonids was emphasized. The quality of this environment affects both the embryo development and the fry emergence from the gravel substrate. The four major program components, and the system design of the computer program, which simulated the percent fry emergence, are presented, and the cause and effect relationships between the percent fry emergence and the upstream soil and water conservation measures are discussed.

Subject Headings: Water conservation | Water pollution | Soil water | Rivers and streams | Soil pollution | Agriculture | Agricultural wastes

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