Assessment of National Small Rural Watersheds Program: Volume 2, Appendixes

001794901977PDFTech ReportFHWA-RD-77- 22 Final Rpt., FCP 35H3-092DOT-FH-11-8605CulvertsData analysisData collectionDesignDrainageEconomic analysisFloodsHazardsHydrologyMathematical analysisRisk assessmentRural areasWatershedsWatershedsUnited StatesUnited States. Department of TransportationUnited States. Federal HIghway Administration. Office of Research and DevelopmentFiering, Myron B.Sharpin, R. E.YoungK., G.Meta Systems, Inc.GKY & AssociatesUnited States. Federal Highway AdministrationFederal Highway AdministrationA State-by-State assessment is made of the current status of the National Small Rural Watersheds Program with regard to adequacy of data collection and analysis. Methodology is recommended for flood frequency estimation to replace currently used biased approaches. Concepts of risk aversion are discussed, and decision criteria based on economic considerations are incorporated into the hydrologic evaluation. Stream gauging programs of various gauging densities for 78 States are evaluated and recommendations made for continuation or termination of the programs based on FHWA objectives of drainage culvert design.93