Factors Affecting Shape of Hydrograph

Q. The shape of the recession limb of hydrograph depends on

1. basin as well as storm characteristics
2. storm characteristics only
3. basin characteristics only
4. base flow only

Q. Consider the following statements:
1. Only the surface flow constitutes the flood hydrograph due to an isolated storm.
2. For a given storm, the flood peak is dependent on the drainage density.
3. Fan shaped catchments give narrow hydrograph with low peak.
Which of these statements is/are correct?

1. 1, 2 and 3
2. 1 and 3
3. 2 only
4. 3 only

Q. A watershed was transformed from rural to urban over a period of time. The effect of urbanization on storm runoff hydrograph from the watershed is to

1. decrease the volume of runoff
2. increase the time to peak discharge
3. decrease the time base
4. decrease the peak discharge

Q. Identify the correct statements :
Flood hydrograph of two meteorologically homogeneous catchments of equal area A and B under rainfall are shown in figure below. If all other factors remains the same, relative to A catchment B has

1. a low drainage density
2. considerable large forest cover
3. reduced catchment slope and stream slope
4. has an elongated shape
Of the above, the correct statements are

1. 1, 2 and 4 are correct
2. 2, 3 and 4 are correct
3. 2 and 4 are correct
4. 1, 2, 3 and 4 are correct

Q. If a storm moves from the farthest point in a catchment to the catchment outlet then

1. Peak of the hydrograph will be late
2. Peak of the hydrograph will be early
3. Peak of the hydrograph will be early and base time will be high
4. Peak of the hydrograph will be late and base time will be less