Hydrology and Irrigation Engineering 2022 Question Paper — Government…
The 2022 Hydrology and Irrigation Engineering previous year question paper (Government College of Engineering and Technology, Jammu), with every question and its marks.
- University: Government College of Engineering and Technology, Jammu
- Subject: Hydrology and Irrigation Engineering
- Course: Hydrology and Water Resource Engineering
- Branch: Civil Engineering
- Year: 2022
- Paper: end-term
- Duration: 180 minutes
- Total marks: 100
Instructions
- Attempt five questions in all selecting at least one question from each Unit.
- Each question carries 20 marks.
- Assume missing data, if any, suitably.
- Use of calculator is allowed.
Questions
UNIT I
- QQ1.. a) Write a detailed note on availability of water in india as well as in the entire world, bringing out the importance and scarceness of this important resource of nature. 10 Marks b) Explain the following terms 1. Dry and wet adiabatic lapse rate 2. Dew point 3.Lapse rates 10 Marks [20 marks]
- QQ2.. a) Find the mean precipitation for the area sketched below by Thiessen's method. The area is composed of a square plus an equilateral triangular plot of side 4 kilometres. Rainfall readings in centimetres at various stations are also given in the below figure. 10 Marks b) A student wants to estimate the potential evapotranspiration for a region with the following meteorological data: average temperature of 25°C, relative humidity of 75%, wind speed of 3 meters per second, and solar radiation of 800 watts per square meter. Calculate the potential evapotranspiration using the Hargreaves method. 10 Marks [20 marks]
UNIT II
- QQ3.. a) A watershed has experienced a heavy rainfall event. The initial infiltration rate is 12 mm/hour, and the rainfall intensity is 20 mm/hour. If Horton's equation governs the infiltration process and the decay constant (k) for the watershed is 0.2 per hour, determine the infiltration rate after 3 hours. 10 Marks b) A soil has the following properties: porosity (n) = 0.40, initial moisture content (θi) = 0.15, hydraulic conductivity (K) = 10 cm/hour, and sorptivity (S) = 5 cm. Calculate the cumulative infiltration after 2 hours of rainfall with an intensity of 4 cm/hour using the Green-Ampt method. 10 Marks [20 marks]
- QQ4.. a) Write down the various factors influencing infiltration. Explain in detail. 10 Marks b) Tabulated below are data for a number of storms observed on a river. Compute W index for all storms. What would be the average error and the average percentage error in estimated runoff, if the average W index was used to compute the runoff? If the computed infiltration exceeds the rainfall, take estimated runoff as zero. Storms No. | Duration of rain in hours | Average rainfall in cm | Runoff in cm ---|---|---|--- 1 | 12 | 2.82 | 1.32 2 | 48 | 2.98 | 1.02 3 | 24 | 4.55 | 2.46 4 | 72 | 14.22 | 7.42 5 | 18 | 2.87 | 0.43 6 | 24 | 3.91 | 0.48 7 | 36 | 8.10 | 1.93 8 | 12 | 4.40 | 1.67 9 | 30 | 5.31 | 1.98 10 | 18 | 6.98 | 3.15 Given the following hourly rainfall and runoff data for a watershed: • Hourly Rainfall (mm): 15, 25, 20, 10, 5 • Corresponding Runoff (mm): 3, 9, 10, 4, 1 Create an S-curv…
UNIT III
- QQ5.. a) what are the factors on which the rate of silting of an impounding reservoir depends? What is trap efficiency? 10 Marks b) Write down the various zones of storage in a reservoir with the help of a sketch and explain each zone in detail. 10 Marks [20 marks]
- QQ6.. a) Estimate the peak discharge for a small catchment area with an effective impervious area of 25 hectares (250,000 square meters) during a storm event with an intensity of 30 mm/hour. The runoff coefficient for impervious areas is determined to be 0.70. Calculate the peak discharge using the Rational Method. 10 Marks b) Flood forecasting and flood warning system is a must for fighting and combating floods. Discuss this statement in detail. 10 Marks [20 marks]
UNIT IV
- QQ7. Write down brief notes on 1. Aquifer 2. Aquiclude 3. Aquifuge 4. Auitard 20 Marks [20 marks]
- QQ8.. a) Consider a pumping well installed in an unconfined aquifer with a radius of influence of 150 meters. The observed drawdown at a radial distance of 50 meters from the well is 3 meters. Calculate the transmissivity of the unconfined aquifer using Thiem's formula. 10 Marks b) What are droughts? What are the major causes of droughts? Write down the remedies to overcome droughts. 10 Marks [20 marks]