Existing Hydrologic Studies
Existing hydrologic studies have been developed for many rivers in Washington State. FEMA has developed most of these reports. USACE […]
Various types of drainage facilities are required to protect the highway against surface and subsurface water. Drainage facilities must be designed to convey the water across, along, or away from the highway in the most economical, efficient, and safe manner without damaging the highway or adjacent property. The purpose of this manual is to provide detailed information on the subjects of hydrologic and hydraulic analysis related to highway design. This manual should be used in conjunction with the Washington State Department of Transportation (WSDOT) Highway Runoff Manual and the WSDOT Design Manual, specifically Section 1210.
Existing hydrologic studies have been developed for many rivers in Washington State. FEMA has developed most of these reports. USACE […]
While measured flows provide the best data for design purposes, it is not practical to gage all rivers and streams
When available, published flow records provide the most accurate data for designing culverts and bridge openings. This is because the
MGSFlood should be used once the PEO has selected the BMP(s) for the project site and has determined the input
When designing stormwater facilities in western Washington, the PEO must use an Ecology-approved continuous-simulation hydrologic model to meet the requirements
Continuous-Simulation Hydrologic Model (Western Washington Only) Read Post »
The SBUH Method requires input of parameters that describe physical drainage basin characteristics. These parameters provide the basis from which
The SBUH Method requires the input of a rainfall distribution or a design storm hyetograph. The design storm hyetograph is
The SBUH Method is best suited for WSDOT projects where conveyance systems are being designed and for some stormwater treatment
Single-Event Hydrograph Method: Santa Barbara Urban Hydrograph Read Post »
After the appropriate storm frequency for the design has been determined (see Chapter 1) and the time of concentration has