Hydrology and Ground Water

181. The stream which does not have any base flow contribution is called

1. Perennial stream
2. Intermittent stream
3. Ephemeral stream
4. None of the above

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182. The surface run off is due to

1. Initial rain
2. Residual rain
3. Rain in the net supply interval
4. All the above

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183. The surface Run-off is the quantity of water

1. Absorbed by soil
2. Intercepted by buildings and vegetative cover
3. Required to fill surface depressions
4. That reaches the stream channels

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184. The theory of infiltration capacity was given by

1. Merrill Bernard
2. W.W. Horner
3. Le-Roy K. Shermen
4. Robert E. Horten

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185. The time required by rain water to reach the outlet of drainage basin, is generally called

1. Time of concentration
2. Time of overland flow
3. Concentration time of overland flow
4. Duration of the rainfall

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186. Which of the following is a flexible outlet?

1. Submerged pipe outlet
2. Kennedy's gauge outlet
3. Gibb's outlet
4. None of the above

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187. The uplift pressure on the face of a drainage gallery in a dam is taken as

1. Hydrostatic pressure at toe
2. Average of hydrostatic pressure at toe and heel
3. Two-third of hydrostatic pressure at toe plus one-third of hydrostatic pressure at heel
4. None of the above

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188. Time of overland flow, is affected by

1. Slope of the basin
2. Type of the ground surface
3. Length of the flow path
4. All the above

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189. Which of the following canal structures is used to remove surplus water from an irrigation channel into a natural drain?

1. Canal fall
2. Canal outlet
3. Canal escape
4. Canal regulator

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190. Tortuosity of a meandering river is always

1. Equal to 1
2. Less than 1
3. Greater than 1
4. Less than or equal to 1

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