Question

If the direction of advance of a storm is the same as the direction of the resulting runoff in the drainage basin, such runoff will generally
1. Be more than the ‘rational’ runoff through a short time
2. Result in increased infiltration through a short time
3. Be less than the ‘rational’ runoff through a short time
4. Result in increased evaporation, as also transpiration, loss

Answer 1

Correct Answer - Option 1 : Be more than the ‘rational’ runoff through a short time

Concept:

\(Total~runoff=\frac{1}{2}\times 60\times 72\times 3600\)

Total runoff = 7776000 m³ 

\(Depth~of~runoff=\frac{Total~runoff}{Catchment~area}\)

\(Depth~of~runoff=\frac{7776000}{777.6\times {{10}^{6}}}~m\)

Depth of runoff = 0.01 m = 1 cm

∴ If the direction of advance of a storm is the same as the direction of the resulting runoff in the drainage basin, such runoff will generally be more than the ‘rational’ runoff through a short time.