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University of Arizona (1979)

A model for relating the distribution of precipitation in Arizona to land surface characteristics

Majewski, Sandra Kathryn

Titre : A model for relating the distribution of precipitation in Arizona to land surface characteristics

Auteur : Majewski, Sandra Kathryn

Université de soutenance : University of Arizona

Grade : Master of Science (MS) 1979

Résumé
Mean annual precipitation in Arizona ranges from under three to over 27 inches. The irregular network of precipitation recording sta tions and the diverse topography present problems in the construction of maps which accurately depict the distribution of precipitation in the state. This research suggests an alternative approach to the production of isohyetal maps employing statistical models, based on topographic features, and an elevation data file. Use of five variables which simu late various topographic features assumed to influence precipitation in the area in two separate models which represent Arizona’s two seasons of "maximum" precipitation forms the foundation for the analysis. Examina tion of the chosen variables at 100 control stations illustrates their effects upon the amount of precipitation received during each season. Summation of the seasonal values produces estimates of mean annual pre cipitation for each station. Employing the least-squares equations developed in each seasonal analysis allows computerized production of a map which depicts estimates of mean annual precipitation for cells contained within the data file.

Mots clés : Precipitation forecasting — Arizona — Mathematical models. ; Landforms — Climatic factors — Arizona — Mathematical models.

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Page publiée le 1er mai 2016, mise à jour le 18 décembre 2017