Climatic variability and flood frequency of the Santa Cruz River, Pima County, Arizona

Dissipating tropical cyclones Monsoonal storms Climatic variability in the 20th century Teleconnections and 20th-century variability in global climate Frequency of El Nifio-Southern Oscillation conditions in the 20th century Changes in circulation of the upper atmosphere El Nino-Southern Oscillation and precipitation in southern Arizona Hydrologic variability in the Santa Cruz River basin 31 Frequency analysis of annual floods in the Santa Cruz River 31 Previous estimates of the 100-year flood 31 Effects of land use and channel change Seasonality of annual floods Estimates of 100-year discharges using method of moments, 1970-85 Trend analysis of the annual flood series Flood frequency during El Nino-Southern Oscillation conditions 41 Hydroclimatic flood-frequency analysis of the Santa Cruz River 41 Separation of floods by storm types Methods of flood-frequency analysis Frequency of floods caused by different storm types Summary and conclusions