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Water Resources Engineering - I

16CE120

UNIT – I INTRODUCTION TO HYDROLOGY: Engineering Hydrology and its Applications – Hydrologic Cycle – Precipitation- Types and Forms – Rainfall Measurement – Types of Rain Gauges – Computation of Average Rainfall Over a Basin – Presentation and Interpretation of Rainfall Data. 

UNIT – II DESCRIPTIVE HYDROLOGY: Evaporation- Factors Affecting Evaporation – Measurement of Evaporation – Infiltration – Factors Affecting Infiltration – Measurement of Infiltration, – Infiltration Indices – Run Off- Factors Affecting Run-off – Computation of Runoff – Design Flood – Estimation of Maximum Rate of Run-off – Separation of Base Flow HYDROGRAPH ANALYSIS: Hydrograph: Unit Hydrograph – Construction and Limitations of Unit Hydrograph – Application of Unit Hydrograph – S-Hydrograph. 

UNIT – III GROUND WATER: Introduction – Aquifer – Aquiclude – Aquifuge – Aquifer Parameters – Porosity – Specific Yield – Specific Retention – Divisions of Sub – Surface Water – Water Table – Types of Aquifers – Storage Coefficient – Coefficient of Permeability and Transmissibility – Well Hydraulics – Darcy‟s Law – Steady Radial Flow to A Well – Dupuit‟s Theory for Confined and Unconfined Aquifers – Tube Well – Open Well – Yield of An Open Well– Constant Level Pumping Test – Recuperation Test.

UNIT – IV IRRIGATION: Introduction – Necessity and Importance of Irrigation – Advantages and Ill Effects of Irrigation – Types of Irrigation – Methods of Application of Irrigation Water – Quality for Irrigation Water – Duty and Delta – Duty at Various Places – Relation Between Duty and Delta – Factors Affecting Duty – Methods of Improving Duty. WATER REQUIREMENT OF CROPS: Types of Soils – Indian Agricultural Soils, – Preparation of Land For Irrigation – Soil Fertility – Soil-Water-Plant Relationship – Vertical Distribution of Soil Moisture – Soil Moisture Tension – Soil Moisture Stress – Various Soil Moisture Constants – Limiting Soil Moisture Conditions – Depth and Frequency of Irrigation – Gross Command Area – Culturable Command Area – Culturable Cultivated and Uncultivated Area – Kor Depth and Kor Period – Crop Seasons and Crop Rotation – Irrigation Efficiencies – Determination of Irrigation Requirements of Crops – Assessment of Irrigation Water – Consumptive Use of Water – Factors Affecting Consumptive Use – Direct Measurement and Determination By Use of Equations (Theory Only)

 UNIT V CHANNELS – SILT THEORIES: Classification – Canal Alignment – Inundation Canals – Cross-Section of An Irrigation Channel – Balancing Depth – Borrow Pit – Spoil Bank – Land Width – Silt Theories – Kennedy‟s Theory – Kennedy‟s Method of Channel Design – Drawbacks in Kennedy‟s Theory – Lacey‟s Regime Theory- Lacey‟s Theory Applied to Channel Design – Defects in Lacey‟s Theory – Comparison of Kennedy‟s and Lacey‟s Theory

 TEXT BOOKS: 1. Irrigation Water Resources and Power Engineering, by Dr. P.N. Modi, 9th Edition, Standard Book House. 2. Engineering Hydrology by K Subramanya, 4th Edition, McGraw Hill Publication.

 REFERENCES: 1. Water Resource Engineering Vol.I& Vol. II by Santhosh Kumar Garg, 23rd Edition, Khanna Publishers 2. A Textbook of Hydrology by Dr. P. Jaya Rami Reddy, 3rd Edition: Publisher: Laxmi 

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