NAME OF DEPT: Department of Civil Engineering

Subject Code: 12CE55 Course Title: HYDROLOGYTotal No of Hrs: 45Credits: 03 Hours per week: 3

Pre-requisite: Fluid Mechanics

COURSE OBJECTIVE

The objective is to introduce the students to components of the hydrological cycle, mechanics of rainfall, its spatial and temporal measurement and their applications. Simple statistical analysis and application of probability distribution of rainfall and run off shall also be introduced.

1. INTRODUCTION: Definition and Scope, Hydrological Cycle, Water-Budget Equation, World’s and India’s water budget, Practical Applications.

5

2. PRECIPITATION: Forms of precipitation, Weather Systems for Precipitation - : Types of Precipitation, Measurement of Precipitation (Simon’s gauge & Tipping-Bucket Type gauge only), Raingauge Network, Preparation of Data, Presentation of Rainfall Data, Mean Precipitation over an area, Depth-Area-Duration Relationship, Intensity- Duration-Frequency Relationship, Probable Maximum Precipitation

5

3. EVAPORATION AND EVAPOTRANSPIRATION: Evaporation: Definition, factors affecting, measurement (Class A pan). Estimation using empirical methods (Meyer’s and Rohwer’s equation), Evaporation control. Evapotranspiration: Definition, factors affecting, measurement, estimation ( Blaney criddle method)

5

4. INFILTRATION: Infiltration process, Infiltration capacity, Measurement of infiltration ,Infiltration indices ,Horton’s equation of infiltration.

6

5. RUNOFF: Components of Runoff, Factors affecting Runoff , Rainfall Runoff relationship- Inglis Formula, Binnie’s Method, Khosla’s Method .

6

6. HYDROGRAPHS: Factors affecting Hydrograph , Base Flow Separation ,Unit Hydrograph , Derivation of Unit Hydrograph , S-Curve Hydrograph , Unit Hydrograph of Different Durations , Synthetic Unit Hydrograph

6

7. FLOODS AND FLOOD ROUTING : Floods: Ration Method, Empirical Formulae Flood Frequency Studies ,Gumbel’s Method , Flood Routing – Basic Equations, Level Pool Routing –Goodrich Method , Attenuation, Muskingum’s Channel Routing , Flood control

6

8. GROUNDWATER: Types of Aquifers, Aquifer Properties , Darcy’s law , Dupuit’s assumptions , Recuperation test ,Pumping test - Steady flow analysis only.

6

COURSE OBJECTIVE

At the end of the semester, the student shall be having a good understanding of mechanics of rainfall, calculation of losses due to Evaporation and Evapo-transpiration, its spatial and temporal measurement and their applications will be understood. Simple statistical analysis and application of probability distribution of rainfall and run off shall also be understood. Student will also learn simple methods of flood routing and ground water hydrology

Reference:1. Engineering Hydrology – Subramanya.K; Tata Mcgraw Hill NewDelhi-2008 (Ed)2. A Text Book Of Hydrology- Jayarami Reddy, Laksmi Publications, New Delhi-2007 (Ed)