Engineering Hydrology
Course Objectives:
This course is aimed at teaching students the concept of hydrology and computational analysis for the design and management of water resources projects. It gives a practical approach to the various facets of the subject and emphasizes the application of hydrological knowledges to solve engineering problems.
 Introduction [2 hours]
 Definition and Uses of Engineering hydrology
 Hydrologic cycle and water balance equations
 Development of hydrometeorological study in Nepal
 Precipitation [8 hours]
 Causes, forms and types of precipitation
 Measurement of rainfall (types and adequacy of rain gauges)
 Snow fall and its measurements
 Estimation of missing rainfall data
 Test for inconsistencies of rainfall data (Double Mass Curve)
 Presentation of rainfall data (Mass curve, Hyetograph, Average curve of annual rainfall)
 Estimation of mean rainfall over an area
 Development of Intensity  Duration  Frequency (IDF) curve and equation
 Depth  Area  Duration (DAD) curve
 Hydrological Losses [8 hours]
 Initial losses (Interception and depression storage)
 Evaporation process
 Meteorological parameters (Radiation, Temperature, Vapor pressure, Humidity, Wind)
 Energy Budget methods and Mass transfer approach (Dalton’s law)
 Evaporimeters
 Evapotranspiration
 Actual evapotranspiration and Lysimeters
 Potential Evapotranspiration (Penman’s equation)
 Infiltration
 Horton’s equation
 Infiltration indices (Ф and W)
 Infiltrometers
 Surface Runoff [8 hours]
 Drainage basins and its quantitative characteristics
 Factors affecting runoff from a catchment
 Rainfall  Runoff relationship
 Stream gauging (selection of sites, types of gauges and measurement)
 Stream flow measurement by velocity area method (current meters, floats and velocity rods)
 Stream flow computation by slope area method
 Development of Rating curve and its uses
 Estimation of monthly flows from rainfall
 Hydrograph Analysis [7 hours]
 Components of a hydrograph
 Separation of base flow
 Unit hydrographs, their uses and limitations
 Derivation of unit hydrographs from isolated and complex storms
 Derivation of unit hydrographs of different durations
 Flood Hydrology [7 hours]
 Design flood and its frequency
 Statistical methods of flood prediction
 Continuous Probability distribution
 Return period, Frequency and risk
 Plotting positions, frequency factors
 Log Pearson III Method
 Gumbel’s Extreme Value Type I Method
 Flood prediction by Rational and Empirical methods
 Flow Routing [5 hours]
 Linear Reservoir routing
 Time area Method
 Clark Unit hydrograph
Tutorials:
 Estimation of missing rainfall data (1 hour)
 Test for inconsistencies of rainfall data (1 hour)
 Estimation of mean rainfall over an area by 3 methods (1 hour)
 Estimation of Potential evapotranspiration by Penman’s equation (1 hour)
 Use of Horton’s equation and problems related to infiltration indices (1 hour)
 Discharge computation by velocity area and slope area methods (1 hour)
 Determination of stage at zero discharge and preparation of rating curve (1 hour)
 Derivation of unit hydrographs from isolated and complex storms (2 hour)
 Derivation of unit hydrographs of different durations (1 hour)
 Drainage basin Characteristics (1 hour)
 Estimation of design frequency of a design flood (1 hour)
 Estimation of floods by plotting positions and distributions (1 hour)
 Estimation of floods by Rational and Empirical methods ( 1 hour)
 Flow routing and Clark UH (1 hour)
Practical:
 Rainfall – Runoff Simulation
 Field visit at meteorological station
 Stream flow measurement by velocity area method (Current meter and Floats)
 Stream flow measurement by dilution techniques.
Recommended Books and References:
 Engineering Hydrology by K. Subramanya, TataMcGraw Hill Publishing Co., New Delhi
 Applied Hydrology by V.T. Chow, D.R. Midment and L.W. Mays, McGraw Hill International
 Engineering Hydrology by R. S. Varshney, Nem Chand & Bros., Roorkee
 Hydrology for Engineers by Linsley, Kohler and Paulhus, McGraw Hill International Co.
 Engineering Hydrology by B. L. Gupta, Standard Publishers and Distributors, New Delhi
Evaluation Scheme:
The questions will cover all the chapters in the syllabus. The evaluation scheme will be as indicated in the table below
Chapter 
Hours 
Marks Distribution* 
1 
2 
4 
2 
8 
12 
3 
8 
14 
4 
8 
14 
5 
7 
14 
6 
7 
14 
7 
5 
8 
*Note: There may be minor deviation in marks distribution.
