Question 421. 2.  A well penetrates to 30 m below the static water table. After 24 hours of pumping at 31.40 litres/minute, the water level in a test well at a distance of 80 m is lowered by 0.5 m and in a well 20 m away water is lowered by 1.0 m. The transmissibility of the auifer, is

Question 422. 6.  If the loss due to friction in pipes is 4 m, the total losses in strainer and bends may be taken as

Question 423. 7.  Consumptive amount of use of a crop during growth, is the

Question 424. 0.  For calculating the evaporation rate over a reservoir surface E = 0.771 (1.465 - 0.00732 B) (0.44 - 0.007375 V) (pe -Pa), the equation is given by

Question 425. 1. In estimating the rate of evaporation from the reservoir surface, a pan 1.5 metres in diameter, was filled upto 8.0 cm. During a specified period of time, the rainfall recorded was 5 cm. 3 cm of water was removed from the pan to keep the depth of water. At the end of the time, the depth was 9 cm. If the pan coefficient is 0.6, the evaporation loss is

Question 426. 9.  The rate of evaporation from reservoirs may be determined by

Question 427. 8.  Evaporation losses depend upon

Question 428. 3.  Dicken's formula for high flood estimate, is useful only for the catchments in

Question 429. 2.  Phytometer method is generally used for the measurement of

Question 430. 4.  For high flood estimates the average value of the constant C in Dicken's formula Q = CA3I4 , is