This report provides identification of desert hydrologic regions within the arid and semi-arid portions of California, as well as information and direction in choosing appropriate hydrologic and bulking methods specific to each identified desert region. The desert areas were divided into regions based on similar geographic, climate, and hydrologic characteristics. By using the information in this report, the engineer will be equipped in estimating proper desert hydrographs, peak flows, and sediment/debris loads, and have basis for defending these calculations in the project design process.
Current pavement design based on the AASHTO Design Guide uses an empirical approach from the results of the AASHO Road Test conducted in 1958. To addr...
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United States Department of Transportation
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