Question

The theory of synthetic hydrograph based on flood routing techniques is based on the principle that rainfall impulse (net storm rain) is modified by the factors.
1. The time of travel of the flow volume in channel and overload flow.
2. Storage
3. Both translation and storage

• A. 1 and 2 only
• B. 1, 2 and 3
• C. 1 and 3 only
• D. 2 and 3 only

Answer 1

The correct option is C 1 and 3 only

According to Snyder the shape of synthetic unit hydrograph is likely to be affected by basin characteristics like area, topography,shape of the slope, drainage density and channel storage.So, according to the theory synthetic hydrograph is affected by:
1. The time of travel, i.e. translation time of the flow volume in channel and overland low.
2. Both translation and storage capacity of the basin.