A. 1 hour
B. one-fourth of basin lag
C. one-half of basin lag
D. equal to basin lag
A. 50 mm
B. 60 mm
C. 90 mm
D. 140 mm
A. velocity of flow of water
B. depth of flow of water
C. discharge
D. none of the above
A. increase in intensity of rain
B. increase in infiltration capacity
C. increase in permeability of soil
D. all of the above
A. much more than evapotranspiration
B. much less than evapotranspiration
C. equal to evapotranspiration
D. equal to or less than evapotranspi-ration
A. flat water surface
B. convex water surface
C. concave water surface
D. independent of shape of water surface
A. near the building
B. under the tree
C. in an open space
D. in a closed space
A. pressure difference
B. temperature difference
C. natural topographical barriers
D. all of the above
A. movement of water through the soil
B. absorption of water by soil surface
C. both (A) and (B)
D. none of the above