The average mean velocity of a stream having depth h, may be obtained by taking the average of the readings of a current meter at a depth of
The efficiency of a pump may be taken as
Ryve's formula for flood estimate in cumecs, is
Pick up the correct statement from the following :
Pettis formula Q = C (P.B)5/4 cumecs, is based upon
A well is sunk in an unconfined aquifer having a saturated depth ofm. Assuming the equilibrium flow conditions and a homogeneous aquifer and radius of influence to be same, the ratio of discharges atm andm draw downs, is
If the area of storm hydrograph is equal to 102 cm, the ordinates of a unit hydrograph may be obtained by dividing the ordinates of the storm hydrograph by
Symon's rain gauge is
The best unit period of a unit hydrograph, is equal to basin lag divided by
For determination of average annual precipitation in a catchment basin, the best method is
Pressure exerted by fully saturated air, is known
The respective storm totals at three surrounding stations A, B and C areandmm. If the normal annual precipitation amounts at stations X, A, B and C are respectivelyandmm, the estimated storm precipitation at X is
Precipitation includes
Pick up correct statement from the following :
If the velocities of flow of a stream ofm depth recorded by a current meter at depths of 2 m and 8 m are 0.7 m and 0.3 m respectively, the discharge per unit width of the stream in cubic metres, is
For efficient working of a control meter, its throat length is approximately kept
Levees and flood walls,
A soil strata may consist of
If the viscosity of ground water is 1.the Slitcher's constant isthe effective size of soil particles in acquifer is 0.5 mm and hydraulic gradient is 1 inthe velocity of flow is
Pick up the incorrect statement from the following :
Evaporation losses depend upon
The rainfall cycle period in India is taken as
If total run off of a basin ofhectares is 0.8 cm, the ordinate of Bernard's distribution graph, may be calculated by the formula (where Q is the discharge in cumecs at the given time)
The area of a drainage basin whose axial length iskm issq. km. Its form factor is
If h is the loss due to friction in a pipe. Total losses in strainer and bends may be taken as
Isopiastic lines are the contours
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