Hydrograph Development - USDA

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Module 207 Hydrograph Development Module 207- Hydrograph Development Module Description Objectives Upon completion of this module, the participant will be able to: . Describe the use of hydrographs in NRCS programs . Explain the Unit Hydrograph Theory . Derive the peak rate equation . Explain how to develop composite flood hydrographs . Perform at ASK Level 3, (perform with Supervision). Prerequisites Module 107, Hydrograph Development , or its equivalent is recommended, but not required. Who May Take This Module This module is intended for all engineers, area-level technicians and others who need to understand Hydrograph Development . Content This module describes the use of hydrographs, explains the unit Hydrograph theory, derives the peak rate equation, and discusses how the unit Hydrograph is used to develop composite flood hydrographs.

Floodplain Delineation . ... uniformly shaped drainage areas with a unit hydrograph prepared for each. A combined unit ... For larger drainage areas divide the watershed into two or more hydrologically similar areas. The peak rate equation assumes rainfall has a short duration and uniform distribution. Remember, storm duration is the actual ...

  Development, Usda, Watershed, Drainage, Delineation, Hydrograph, Hydrograph development