Mugshot for Third Internal Test-WRE

1.      Define Hydrology. Explain the use of hydrology in irrigation engineering.

2.      Explain the Hydrology cycle with its neat sketch.

3.      Explain the types of precipitation.

4.      Explain with a neat sketch Non-recording type rain gauge (Simon’s rain gauge).

5.      Explain with a neat sketch working of float type automatic rain gauge.

6.      Explain the factors affecting runoff.

7.      A catchment area has eight isohyets of value 7, 8, 9, 10, 11, 12, 13, 14 cm. Areas enclosed between successive isohyets are respectively 20, 70, 121, 79, 50, 44, 26 square kilometres. Determine the average value of precipitation in the area.

8.      There are 5 rain gauge stations A, B, C, D, E and areas in charge of each rain gauge and precipitations recorded by gauge stations are given as follows. Determine the average precipitation by Thiessen polygon method:

Gauge Station	A	B	C	D	E
Area (km2)	68	72	56	44	50
Rainfall (mm)	25	29	18	22	15

9.      The isohyets for annual rainfall over a catchment basin were drawn. The areas of strips between the isohyets are indicated below. Find the average depth of annual rainfall or precipitation over the basin.

Isohyets (cm)	Area (Sq. km)	Isohyets (cm)	Area (Sq. km)
75-85	580	105-115	1000
85-95	2960	115-135	610
95-105	2850	135-155	160