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HYDRAULIC Cqi Questions

This document contains information about a hydraulics and hydrology course including sample problems related to topics like watershed modeling, open channel flow, and hydraulic structures. It includes 8 sample problems calculating things like evapotranspiration from watershed data, storage changes in rivers over time, runoff from rainfall data, flow properties in trapezoidal channels, and performance characteristics for a hydraulic turbine under different operating conditions.

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Jibul temulak
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172 views2 pages

HYDRAULIC Cqi Questions

This document contains information about a hydraulics and hydrology course including sample problems related to topics like watershed modeling, open channel flow, and hydraulic structures. It includes 8 sample problems calculating things like evapotranspiration from watershed data, storage changes in rivers over time, runoff from rainfall data, flow properties in trapezoidal channels, and performance characteristics for a hydraulic turbine under different operating conditions.

Uploaded by

Jibul temulak
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PDF, TXT or read online on Scribd
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Hydraulics & Hydrology

BNP20103
Semester 1 2018/2019

Continuous quality improvement (CQI) Questions

1. In a given year, a 10,000 Km2 watershed received 30 cm of precipitation. The annual rate of
flow measured in the river draining the area is 60 m3/sec. Estimate the Evapotranspiration.
Assume negligible change of storage and net groundwater flow.

2. At a particular area, the storage in a river reach is 40 acre – ft. The inflow at that time was
measured to be 200 cfs and the outflow is 300. The inflow after 4 hours was measured to be
260 and the outflow was 270. Determine a) the change in storage during the elapsed time
and b) The final storage volume.

3. A lake has a surface area of 100 000 m2. For a given month, the lake has an inflow of 5 m3/s
and an outflow of 3 m3/s. The seepage loss is 3.5 cm and evaporation loss is 20 cm for the
same period. If a precipitation recorded a total of 30 cm for this month, determine the
change in storage for that month. (Answer in cubic meter)

4. A storm event with 150 mm precipitation produced a direct runoff of 50 mm over a certain
catchments area. Estimate the θ index for the catchments using the rainfall data given at table
below
Time (hr) Rainfall (mm)

1 3

2 9

3 15

4 23

5 18

6 16

7 10

8 6
Hydraulics & Hydrology
BNP20103
Semester 1 2018/2019

5. Find:

(a) Top width T, area A, wetted perimeter P, and hydraulic radius R.

(b) If Q = 2.4 m3/s, determine the state of flow.

(c) If longitudinal length L = 50 m, find the cost to construct the channel. Given excavation cost =
RM 3.50/m3 and lining cost = RM 5.30/m2

7. A very wide rectangular channel has a slope of 0.0004 and Manning n = 0.02. If 2.54 m3/s/m flow is to
be conveyed in this channel, estimate the normal depth.

8. A turbine produces 8000 kW of power at 500 rpm under a net head of 45 m with an overall efficiency
of 85%. Determine the revolution per-minute (rpm), discharge and brake power of the same turbine under
a net head of 60 m in homologous conditions.

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