46051. The rainfall cycle period in India is taken as
46052. Isohytes are the imaginary lines joining the points of equal
46053. The rainfall at any place is described by
46054. Discharge curve may be extended by logarithmic method if
46055. The best instrument for measuring the velocity of a stream flow is
46056. 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
46057. If the velocities of flow of a stream of 10 m 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
46058. The time required by rain water to reach the outlet of drainage basin, is generally called
46059. Time of overland flow, is affected by
46060. The rate of rainfall for successive 10 minute periods of a 60 minute duration storm, are shown in the below figure. If the value of φindex is 3 cm/hour, the run off will be
46061. From the pattern of the rainfall shown in the below figure, the total precipitation is
46062. From the data of the rain storm shown in the below figure, the value of Windex is
46063. A unit hydrograph is a hydrograph of a rain storm of a specified duration resulting from a run-off of
46064. The best unit period of a unit hydrograph, is equal to basin lag divided by
46065. If total run off of a basin of 50 hectares 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)
46066. If the grain size of soil increases
46067. The equation which is used for determining the velocity of ground water flow in metres per day is known as
46068. According to Thiem, the permeability of an aquifer may be obtained from the equation
46069. The Dupuit formula is based on
46070. A well is sunk in an unconfined aquifer having a saturated depth of 100 m. Assuming the equilibrium flow conditions and a homogeneous aquifer and radius of influence to be same, the ratio of discharges at 20 m and 40 m draw downs, is
46071. Evaporation losses depend upon
46072. Phytometer method is generally used for the measurement of
46073. For high flood estimates the average value of the constant C in Dicken's formula Q = CA3/4, is
46074. Pettis formula Q = C (P.B)5/4 cumecs, is based upon
46075. Boston society of Civil Engineer's formula in cumecs/square km is based upon
46076. For predicting floods of a given frequency, the best reliable method is
46077. The earthen embankments constructed parallel to the river banks at some suitable distance for flood control, are known as
46078. Water is useful for
46079. Knowledge of hydrology is necessary for civil engineers for
46080. Run off includes
46081. A soil strata may consist of
46082. If the slope of a line for infiltration capacity curve is , the value of constant k in Horton's equation of infiltration capacity curve, is
46083. The equation P - Q = Te φindex for determining the infiltration capacity, was suggested by
46084. Pressure exerted by fully saturated air, is known
46085. A volume of air at constant barometric pressure may be brought to dew point by
46086. If the dew point is greater than 0°C
46087. Humidity refers to
46088. Relative humidity is the ratio of actual vapour pressure to the saturation vapour pressure
46089. Pick up correct statement from the following :
46090. Precipitation caused due to upward movement of warmer air as compared to surrounding air, is called
46091. Precipitation caused due to striking of air masses with a topographical feature, is called
46092. The specifications of most commonly used standard gauges in India, are
46093. The respective storm totals at three surrounding stations A, B and C are 110, 90 and 70 mm. If the normal annual precipitation amounts at stations X, A, B and C are respectively 1000, 1100, 1200 and 1250 mm, the estimated storm precipitation at X is
46094. The area enclosed by the adjacent isohyets of a catchment basin are shown under : The average depth of annual precipitation in the catchment basin will be
46095. The recurrence interval (R.I.) of 20 cm rain storm at a place is 5 years.
46096. Sharp crested weirs are generally used
46097. For efficient working of a control meter, its throat length is approximately kept
46098. A control meter is preferred to a weir because
46099. A river is said to be of uniform section if in its section
46100. The form factor of a drainage basin is obtained by dividing
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