1
GATE CE 2025 Set 1
MCQ (Single Correct Answer)
+2
-0.67

The mean rainfall over a catchment has to be estimated. The data for four rain gauges located in and around the catchment is listed in the table. Which one of the following statements is correct:

$$ \begin{array}{|l|c|c|c|c|} \hline \text { Rain gauge station } & \text { P } & \text { Q } & \text { R } & \text { S } \\ \hline \text { Whether located inside the catchment } & \text { Yes } & \text { Yes } & \text { Yes } & \text { No } \\ \hline \text { Thiessen weightage factor } & 0.25 & 0.50 & 0.10 & 0.15 \\ \hline \text { Rainfall (mm) } & 100 & 110 & 100 & 125 \\ \hline \end{array} $$
A
The estimate obtained from the Thiessen-mean method is greater than that obtained using the arithmetic-mean method
B
The estimate obtained from the Thiessen-mean method is equal to that obtained using the arithmetic-mean method
C
The estimate obtained from the Thiessen-mean method is less than that obtained using the arithmetic-mean method
D
The Thiessen-mean method cannot be applied in this case
2
GATE CE 2024 Set 2
Numerical
+2
-0

A storm with a recorded precipitation of 11.0 cm, as shown in the table, produced a direct run-off of 6.0 cm.

Time from start (hours) 1 2 3 4 5 6 7 8
Recorded cumulative precipitation (cm) 0.5 1.5 3.1 5.5 7.3 8.9 10.2 11.0

The Ø-index of this storm is ______________ cm/hr (rounded off to 2 decimal places).

Your input ____
3
GATE CE 2024 Set 1
Numerical
+2
-0

The ordinates of a 1-hour unit hydrograph (UH) are given below.

Time (hours) 0 1 2 3 4 5
Ordinates of 1-hour UH (m3/s) 0 13 50 80 95 85
Time (hours) 6 7 8 9 10 11
Ordinates of 1-hour UH (m3/s) 55 35 15 10 3 0

These ordinates are used to derive a 3-hour UH. The peak discharge (in m3/s) for the derived 3-hour UH is ___________ (rounded off to the nearest integer).

Your input ____
4
GATE CE 2023 Set 2
Numerical
+2
-0

A catchment may be idealized as a circle of radius 30 km. There are five rain gauges, one at the center of the catchment and four on the boundary (equi-spaced), as shown in the figure (not to scale).

The annual rainfall recorded at these gauges in a particular year are given below.

$$ \begin{array}{|l|l|l|l|l|l|} \hline \text { Gauge } & \mathrm{G}_1 & \mathrm{G}_2 & \mathrm{G}_3 & \mathrm{G}_4 & \mathrm{G}_5 \\ \hline \text { Rainfall }(\mathrm{mm}) & 910 & 930 & 925 & 895 & 905 \\ \hline \end{array} $$


Using the Thiessen polygon method, what is the average rainfall (in mm, rounded off to two decimal places) over the catchment in that year? ________

GATE CE 2023 Set 2 Hydrology - Precipitation and Frequency of Rainfall Data Question 2 English
Your input ____
GATE CE Subjects
EXAM MAP
Medical
NEETAIIMS
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
Civil Services
UPSC Civil Service
Defence
NDA
Staff Selection Commission
SSC CGL Tier I
CBSE
Class 12