Hydrology and Ground Water

141. The elevation Z of the watershed is: (where letters carry their usual meanings)

1. Reduced level of the top most point of the basin
2. Reduced level of the lower most point of the basin
3. Average elevation of the highest and lowest point of the drainage basin
4. Obtained by the formula Z = (a₁z₁ + a₂z₂ + a₃z₃ + a_nz_n)/A

View answer

142. The equation P - Q = Teφ_index for determining the infiltration capacity, was suggested by

1. Horton
2. Horner
3. Lloyd
4. Bernard

View answer

143. The equation V = (1000 ID₁₀²/60) × (1.8T + 42) which is used for determining the velocity of ground water flow in metres per day is known as

1. Meinzer's formula
2. Slichter's formula
3. Darcy's formula
4. Hazen formula

View answer

144. The flow of water after spilling over the weir crest in chute spillway and side channel spillway respectively are

1. At right angle and parallel to weir crest
2. Parallel and at right angle to weir crest
3. Parallel to weir crest in both
4. At right angle to weir crest in both

View answer

145. The flow-mass curve is graphical representation of

1. Cumulative discharge and time
2. Discharge and percentage probability of flow being equalled or exceeded
3. Cumulative discharge, volume and time in chronological order
4. Discharge and time in chronological order

View answer

146. The form factor of a drainage basin is obtained by dividing

1. Area of the basin by the axial length
2. Average width of the basin by the axial basin
3. Area of the basin by the square of the axial length
4. Both (b) and (c)

View answer

147. The infiltration capacity during rain storm, is considerably reduced due to

1. Surface detention
2. Soil moisture
3. Compaction due to rain
4. All the above

View answer

148. The initial basin recharge is equal to

1. Interception
2. Depression storage
3. Rain absorbed by the moisture deficiency
4. All the above

View answer

149. The main cause of meandering is

1. Presence of an excessive bed slope in the river
2. Degradation
3. The extra turbulence generated by the excess of river sediment during floods
4. None of the above

View answer

150. The main factor which affects the infiltration capacity, is

1. Thickness of saturated layer
2. Depth of surface detention
3. Soil moisture
4. All the above

View answer