Evaporation and Transpiration · Hydrology · GATE CE

A two-hour duration storm event with uniform excess rainfall of 3 cm occurred on a watershed. The ordinates of streamflow hydrograph resulting from this event are given in the table.

Time (hours)	0	1	2	3	4	5	6	7
Streamflow (m$$^3$$/s)	10	16	34	40	31	25	16	10

Considering a constant baseflow of 10 m³/s, the peak flow ordinate (in m³/s) of one-hour unit hydrograph for the watershed is ____________. (in integer)

The ratio of actual evapo-transpiration to potential evapo-transpiration is in the range

Lysimeter and Tensiometer are used to measure respectively, one of the following groups of quantities:

A symmetrical trapezoidal canal is 100 km long. The bottom width is 10 m and the side slope is 1 Horizontal : 1 Vertical. The average flow depth in the canal is 2.5 m throughout the month of April. The measurement from a Class-A evaporimeter in the vicinity of the canal indicated an average evaporation rate of $0.5 \mathrm{~cm} /$ day in April.

The volume of water evaporated from the canal (in $\mathrm{m}^3$ ) in the month of April is close to __________ $\times 10^3$ (rounded off to 1 decimal place).

The average surface area of a reservoir in the month of June is 20 km². In the same month, the average rate of inflow is 10 m³/s, outflow rate is 15 m³/s, monthly rainfall is 10 cm, monthly seepage loss is 1.8 cm and the storage change is 16 million m³. The evaporation (in cm) in that month is

During a 6-hour storm the rainfall intensity was 0.8 cm/hr on a catchment of area 8.6 km². The measured runoff volume during this period was 2,56,000 m³. The total rainfall was lost due to infiltration, evaporation and transpiration in cm/hr is