Important RGPV Question
CE-603(A) Water Resource Engineering ,
VI Sem, CE
UNIT 1-Irrigation Water Requirement and Soil-Water-Crop Relationship
Q.1) Derive the equation to determine the relationship between duty, delta and base period. (RGPV MAY 2024)
Q.2) After how many days will you supply water to soil in order to ensure efficient irrigation of the given crop, if (RGPV MAY 2024)
i) Field capacity of soil = 35%
ii) Permanent wilting point = 15%
iii) Density of soil = 1.5 g/cm³
iv) Daily consumption use of water for the given crop = 12 mm.
v) Effective depth of root zone = 80 cm²
Q.3) Compare and contrast sprinkler and drip irrigation techniques. (RGPV MAY 2024)
Q.4) Mention methods of improving duty. (RGPV MAY 2023)
Q.5) After how many days will you apply water to soil, if: (RGPV MAY 2023)
i) Field capacity of soil = 28%
ii) Permanent wilting point = 13%
iii) Apparent density of soil = 1.3
iv) Effective depth of the root zone = 70 cm
v) Daily consumptive use of water for the crop = 12mm
Assume additional data if necessary.
Q.6) Define followings: (RGPV MAY 2023)
i) GCA ii) CCA iii) kor period iv) paleo irrigation v) cash crops
Q.7) Derive the relation between duty & delta. Determine the delta of a crop, having duty as 432 hectare/cumec on the field and 45 days is its base period. (RGPV MAY 2023)
UNIT 2-Ground Water and Well Irrigation
Q.1) What are infiltration galleries? And how do they contribute to groundwater recharge? (RGPV MAY 2024)
Q.2) Discuss strategies for reclaiming salt-affected lands and restoring soil fertility. (RGPV MAY 2024)
Q.3) A 30 cm diameter well completely penetrates an artesian aquifer. The thickness of strainer is 25 m. Determine the discharge from the well when the draw down in the well is 4 m and the coefficient of permeability is 45 m/day. Assume radius of influence as 350 m. (RGPV MAY 2024)
Q.4) What is Infiltration? What are various factors affecting infiltration? (RGPV MAY 2023)
Q.5) Mention advantages and disadvantages of well irrigation. (RGPV MAY 2023)
Q.6) Explain Recuperation test for open well. What is the purpose of this test? (RGPV MAY 2023)
Q.7) What are specific yield and specific retention? Explain. (RGPV MAY 2023)
Q.8) Determine the time required to irrigate a strip of land of 0.04 hectares in area from a tube well with a discharge of 0.02 cumec. The infiltration capacity of the soil may be taken as 5 cm/hr, and the average depth of flow on the field as 10 cm. Also determine the maximum area that can be irrigated from this tube well. (RGPV MAY 2022)
Q.9) An extensive aquifer is known to have a groundwater flow in N30°E direction. Three wells A, B and C are drilled to tap this aquifer. The well B is to east of A and the well C is to north of A. The following are the data regarding these wells. (RGPV MAY 2022)
Q.10) In a certain alluvial basin of 100 km2 , 90 mm3 of ground water was pumped in a year and the ground water table dropped by about 5 m during the year. Assuming no replenishment, estimate the specific yield of the aquifer. If the retention is 12%, what is the porosity of the soil? (RGPV MAY 2022)
UNIT 3-Hydrology
Q.1) Explain the methods for measuring precipitation and the differences between recording and non-recording rain gauges. (RGPV MAY 2024)
Q.2) Rain gauge stations A, B, C, D, E and F have normal annual rain fall of 620, 564, 478, 616, 573 and 392 mm respectively. During a storm stations B, C, D, E and F have reported rainfall of 22, 29, 35, 13 and 25 mm respectively and station A did not report as it was inoperative. Estimate the missing storm rainfall at A by Arithmetic and Average rainfall method. (RGPV MAY 2024)
Q.3) Discuss the significance of depth-area duration curves in hydrological studies. (RGPV MAY 2024)
Q.4) Explain Thiessen polygon method of calculating mean precipitation over an area. (RGPV MAY 2023)
Q.5) What are various factors affecting the shape of runoff hydrograph? (RGPV MAY 2023)
Q.6) Give steps to derive UH from a runoff hydrograph. (RGPV MAY 2023)
Q.7) A small watershed consists of 2 km² of forest area (c = 0.1) , 1.2 km² of cultivated area (c = 0.2) and 1.2 km² under grass cover (c = 0.35) . A water course falls by 20 m in a length of 2 km. The IDF relation for the area may be taken as i = 80 T0.2 / (t + 12)0.5. Estimate the peak rate of runoff for a 25-year frequency. (RGPV MAY 2022)
Q.8) On the basis of hydrograph studies explain in brief about perennial and ephemeral stream with suitable diagrams. (RGPV MAY 2022)
Q.9) The rates of rainfall for the successive 30 min period of a 3- hour storm area: 1.6, 3.6, 5.0, 2.8, 2.2, 1.0 cm/hr. The corresponding surface runoff is estimated to be 3.6 cm. Establish the -index. Also determine the W-index. (RGPV MAY 2022)
Q.10) Explain in brief about the analytical methods for determination of lake evaporation. (RGPV MAY 2022)
Q.11) Explain Arithmetic mean method and Thiessen polygon method for calculation of average depth of precipitation over a catchment. (RGPV MAY 2022)
Q.12) The ordinates of a 4-hour unit hydrograph for a particular basin are given below. Determine the ordinates of the S-curve hydrograph and therefrom the ordinates of the 2-hour unit hydrograph and plot them, area of the basin is 630 km². (RGPV MAY 2022)
UNIT 4-Canals and Structures
Q.1) Discuss the objectives of canal lining and the materials commonly used for lining. (RGPV MAY 2024)
Q.2) Explain the factors influencing the alignment of canals and their significance in design. (RGPV MAY 2024)
Q.3) Design an irrigation channel on Kennedy theory to carry a discharge of 14 cumecs. Take N = 0.0225 and m = 1. The channel slope of 1 in 5000 and side slope 0.5:1. (RGPV MAY 2024)
Q.4) What is an Aqueduct? Explain in brief its design procedure. (RGPV MAY 2023)
Q.5) Design a regime channel for a discharge of 50 cumecs, with a silt factor=1.0, by using Lacey’s theory. (RGPV MAY 2023)
Q.6) A certain crop is grown in an area of 3000 hectares, which is fed by a canal system. The data pertaining to irrigation are as follows:
Field capacity of soil = 26%, Optimum moisture = 12%, Permanent wilting point 10%, Effective depth of root zone = 80 cm, Apparent relative density of soil = 1.4. If the frequency of irrigation is 10 days and the overall irrigation efficiency is 22%. Find:
i) Daily consumptive use ii) Water discharge in m³/s required in the canal feeding the area. (RGPV MAY 2022)
Q.7) Explain the classification of irrigation canals based on i) Function of canal ii) Discharge and relative importance in a given network of canals. (RGPV MAY 2022)
Q.8) Define Lacey’s regimes channels. Write any four drawbacks of Lacey’s theory. (RGPV MAY 2022)
Q.9) Design a regime channel for a discharge of 35 m³/s with a silt factor of 0.9 by Lacey’s theory. Taking side slopes as 1H:2V. (RGPV MAY 2022)
UNIT 5-Floods
Q.1) Explain how reservoirs and channels are used to control and regulate floodwaters? (RGPV MAY 2024)
Q.2) What is flood frequency analysis? How do you compute design discharge over a catchment? (RGPV MAY 2024)
Q.3) Explain various factors of affecting the selection of suitable type of cross drainage work. (RGPV MAY 2023)
Q.4) Design an irrigation channel to carry a discharge of 50 cumecs at a slope of 1/5000. Take Kutter’s N = 0.0225 and m = 0.9. (RGPV MAY 2023)
Q.5) Explain free flooding, border flooding and check flooding in brief with the help of neat sketches. (RGPV MAY 2022)
Q.6) Explain Muskingum method of channel routing and steps involved in it. (RGPV MAY 2022)
EXTRA QUESTIONS
Q.1) Write short notes on any two. a) Crop ratio and crop rotation b) Types of wells c) Canal Regulation Structures d) Flood control measures (RGPV MAY 2022)
Q.2) Write a note on rain water harvesting. (RGPV MAY 2023)
— Best of Luck for Exam —
