Match Column X with Column Y :
| Column X | Column Y |
|---|---|
| (P) Horton equation | (I) Design of alluvial channel |
| (Q) Penman method | (II) Maximum flood discharge |
| (R) Chezy's formula | (III) Evapotranpiration |
| (S) Lacey's theory | (IV) Infiltration |
| (T) Dicken's formula | (V) Flow velocity |
Which one of the following combinations is correct?
A pump with an efficiency of 80% is used to draw groundwater from a well for irrigating a flat field of area 108 hectares. The base period and delta for paddy crop on this field are 120 days and 144 cm, respectively. Water application efficiency in the field is 80%. The lowest level of water in the well is 10 m below the ground. The minimum required horse power (h.p.) of the pump is _________. (round off to two decimal places)
(Consider 1 h.p. = 746 W; unit weight of water = 9810 N/m3
In a certain month, the reference crop evapotranspiration at a location is 6 mm day. If the crop coefficient and soil coefficient are 1.2 and 0.8, respectively, the actual evapotranspiration in mm/day is