Hydrology Bs Civil Technology Past Paper 4th Term 2016 UOS

Posted by Ayesha

University of Sargodha
BS 4th Term Examination 2016
Subject: Civil Technology
Paper: Hydrology (CT-225)

Time Allowed: 3 Hours
Maximum Marks: 80

Objective Part (Compulsory)

Q.1. Write short answers of the following in two lines each. (2×8)
a) What is meant by interception in hydrologic cycle? (2)
b) Define Lapse Rate? (2)
c) Define Intensity of Precipitation? (2)
d) What is meant by River stage? (2)
e) Write the rational formula for the calculation of Runoff? (2)
f) What is an unconfined aquifer? (2)
g) Define Dew point? (2)
h) What is a Lysimeter? (2)

ubjective Part (4×16)

Q.2.
(a) What is hydrologic cycle? Draw a schematic flow chart of hydrologic cycle? Write the Hydrologic equation? (8)

(b) Water at a constant rate of 370 cumec was observed to be entering into Tarbela Reservoir in a certain season. If outflow from the reservoir including infiltration and evaporation losses is 280 cumec, find out the change in storage of reservoir for 10 such days. Also convert answer into Hectare-Meter? (8)

Q.3.
(a) What is meant by precipitation? Explain different forms of precipitation? What is a rain gauge? Explain different types of recording rain gauges? (8)

(b) Following is precipitation data of a catchment having 6 rainfall recording stations? Find the average precipitation over the whole catchment by using Thiessen polygon method: (8)

Q.4.
(a) What is meant by Evaporation, Transpiration, Evapotranspiration and Potential Evapotranspiration? How Evaporation is measured? Describe different kinds of pans with relative merits and demerits? (8)

(b) The rainfall during a particular day was 10mm. Class-A Pan is installed in this area. If water added to Pan on that particular day was 12mm, find the evaporation. Take the Pan Coefficient as 0.60. (8)

Q.5.
(a) Why stream gauging is necessary? Explain different gauges used for the measurement of River Stage? (8)

(b) Find discharge in a rectangular channel having manning’s Coefficient n = 0.04, Frictional slope S = 0.0005, Width of 5m and depth of flow of 1.5m? (8)

Q.6.
(a) Explain Discharge measurement in detail by using Floats and Current meter? (8)

(b) Given below are the daily mean flows in Cubic meters per second at a gauging station for a period of 5 days. What is the mean flow rate for the given period in cubic meters per second? What is the total flow during the given period in Hectare-meters? The drainage area is 1935 Km². What is runoff depth in cm? (8)

Q.7.
(a) What is meant by “Soil moisture” and “Ground water”? Explain importance of ground water? Also define aquifer, aquiclude, aquitard and aquifuge? (8)

(b) What is confined aquifer and unconfined aquifer? (8)

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