A quantitative method for using an inventory of the soil and water resources of the state of Oregon to determine human population carrying capacities for two acceptable qualities of life Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/z029p869f

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  • A method was developed for converting the food producing capabilities of Oregon's soils to numerical data from which state and county carrying capacities for human populations could be calculated. Another method was developed for converting the needs for housing and related support construction to numerical data which would consume cultivated soils as the population increased. An existing inventory of the state's soils and their characteristics was used to determine the locations and quantities of soils for each of the 36 counties and 17 major drainage basins. Seven major characteristics and limiting factors were included with other soil type information on 3,102 computer cards. Tabulation of the characteristics and limiting factors is presented in appendices by counties, drainage basins and the state. Streamflow records were obtained for all surface water gauging stations on Oregon streams. Records of the frequency and length of consecutive lower than average streamflow years were determined for significant streams by computer. The carrying capacity for human needs for housing and associated construction, dietary carbohydrates, proteins, and for water were determined for each county, drainage basin and the state for two different qualities of life. The computer program simulated competition between building and agricultural uses for cultivated soils. Printouts included all carrying capacities and final projected equilibrium dates. Oregon's carrying capacity was determined to be about 4.0 million people at a high standard of living, and about 4.8 million at an adequate standard of living. Factors which enhance or limit the carrying capacity were discussed for each county and basin and, for the state as a whole. Suggestions were presented which could refine data to be used for more precise information.
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