Lacdpw hydrology manual

According to the Los Angeles County Department of Public Works Hydrology Manual Year Hour Isohyet Map 1-H, the drainage area is located in Soil Group , the site receives inches of rainfall over a Hr storm (Q. 50). 2. The LACDPW Time of Concentration Calculator Program was used to determine the Tc. The LACDPW Hydrology Manual (January ) establishes the LACDPW hydrologic design procedures based on historic rainfall and runoff data collected within the County. The hydrologic techniques in the manual apply for the design of local storm drains, retention and detention basins, pump stations, and major channel projects. Hydrology area was modeled using the updated LACDPW Method, in accordanceMODRAT with the LACDPW Hydrology Manual. The soil type used is No. 10 and the 50year, 24hour ‐‐ isohyet is 5 inches per Appendix B Sheet 1H of‐ LACDPW Hydrology Manual ().

The LACDPW Hydrology Manual (January ) establishes the LACDPW hydrologic design procedures based on historic rainfall and runoff data collected within the County. The hydrologic techniques in the manual apply for the design of local storm drains, retention and detention basins, pump stations, and major channel projects. The soil types defined in LACDPW Hydrology Manual () shows that the soil type for the entire catchment area is dominated by soil type 10, Oakley Fine Sand, as shown in Figure Figure Hydrologic Soil Type Project Description The Project will involve diverting low flow and the 85th percentile, hour storm event stormwater from. The Hydrology Map attached to this study is made part of this study. The rainfall frequency multiplication factors used to estimate peak runoff for additional storm events were taken from Table of LACDPW Hydrology Manual. Conclusions: The results from this hydrology and hydraulic analysis demonstrate the following.

based on usgs quadrangle 10 0 10 20 30 miles index isohyetal map n w e s 72 r e d o n d o g b e a c h s a n e p e d r o l o n l o s a l a m i t o s i n g l e w o o d. This manual compiles information from previous editions of the County of Los Angeles Hydrology Manual, the Hydrology Manual Addendum, and other reference materials. The standards set forth in this manual govern all hydrology calculations done under Public Works' jurisdiction. Hydrologic. Both the LACDPW Hydraulics Manual and FAA Surface Drainage Manual (AC /C) set forth methodologies and design standards to be used in hydraulic analyses and drainage improvements for development projects at LAX. The drainage design for the proposed Project has been prepared in accordance with the methodologies included in these manuals.