The top width and the depth of flow in a triangular channel were measured as $4 \mathrm{~m}$ and $1 \mathrm{~m}$, respectively. The measured velocities on the centre line at the water surface, $0.2 \mathrm{~m}$ and $0.8 \mathrm{~m}$ below the surface are $0.7 \mathrm{~m} / \mathrm{s}, 0.6 \mathrm{~m} / \mathrm{s}$ and $0.4 \mathrm{~m} / \mathrm{s}$, respectively. Using two-point method of velocity measurement, the discharge (in $\mathrm{m}^{3} / \mathrm{s}$ ) in the channel is

(A) 1.4

(B) 1.2

(C) 1.0

(D) 0.8

The top width and the depth of flow in a triangular channel were measured as $4 \mathrm{~m}$ and $1 \mathrm{~m}$, respectively. The measured velocities on the centre line at the water surface, $0.2 \mathrm{~m}$ and $0.8 \mathrm{~m}$ below the surface are $0.7 \mathrm{~m} / \mathrm{s}, 0.6 \mathrm{~m} / \mathrm{s}$ and $0.4 \mathrm{~m} / \mathrm{s}$, respectively. Using two-point method of velocity measurement, the discharge (in $\mathrm{m}^{3} / \mathrm{s}$ ) in the channel is

(A) 1.4

(B) 1.2

(C) 1.0

(D) 0.8

Group I contains parameters and Group II lists methods/instruments.

Group I $\quad$ Group II

P. $\quad$ Streamflow velocity 1. $\quad$ Anemometer

Q. $\quad$ Evapo-transpiration rate 2. Penman's method

$\begin{array}{ll}\text { R. } & \text { Infiltration rate }\end{array}$ 3. Horton's method

S. $\quad$ Wind velocity 4. Current meter

The CORRECT match of Group I with Group II is

(A) $P-1, Q-2, R-3, S-4$

(B) $\mathrm{P}-4, \mathrm{Q}-3, \mathrm{R}-2, \mathrm{~S}-1$

(C) $\mathrm{P}-4, \mathrm{Q}-2, \mathrm{R}-3, \mathrm{~S}-1$

(D) $\mathrm{P}-1, \mathrm{Q}-3, \mathrm{R}-2, \mathrm{~S}-4$

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