Probable Maximum and TVA (Tennessee Valley Authority) Precipitation Estimates with Areal Distribution for Tennessee River Drainages Less Than 3,000 sq mi in Area

摘要

The study provides probable maximum precipitation (PMP) and Tennessee Valley Authority (TVA) precipitation estimates for durations of 6 to 72 hours and areas of 1 to 3,000 square miles for basins located in the Tennessee River Watershed. The first part gives procedures for estimating PMP and TVA precipitation for small basins (< or = 100 square miles) for durations of 6 to 24 hours, while the second part gives procedures for estimating PMP and TVA precipitation for large basins (100 square miles - 3,000 square miles) for durations of 6 to 72 hours. Specific PMP and TVA precipitation estimates are presented for 26 basins in the Tennessee River Watershed. Procedures are also presented to compute the areal distribution of PMP and TVA precipitation. This includes the areal distribution in concurrent drainages to the main subbasin. Finally, precipitation amounts antecedent to the maximum 24 hour and 3-day storm (both PMP and TVA precipitation) are derived.