Which of the following statement is incorrect?
1
Index of wetness of 35 % means disastrous deficiency for the region
2
Average value of pan coefficient of ISI class A pan is 0.8
3
As per world Meteorological organization, one evaporimeter is sufficient for an area of 10,0000 km2 in a cold region.
4
As per Indian standard, one rain gauge station is sufficient for an area up to 1000 km2 for a plain region.