Note: Intro -- Preface -- Introduction - Perspectives of Water Resources Management -- Abstract -- 1.1. Water and the Society -- 1.2. Availability of Water on the Earth -- 1.3. Hydrologic Cycle and Human Intervention -- 1.4. Global Climate Change and the Water Resource -- 1.5. Future Challenges of Water Resources Management -- Relevant Journals -- References -- Assessment of Water Resources -- Abstract -- 2.1. Estimation of Surface Water Resource -- 2.2. Investigation of Groundwater -- 2.2.1. Planning an Investigation -- 2.2.2. Steps Involved in a Site Investigation -- Field Reconnaissance -- Literature Search -- Determination of Data Requirement and Selection of Method -- 2.2.3. Approaches of Investigation -- 2.3. MechanicalApproach -- Drilling of Exploratory Bore Wells -- Avoiding Cross Contamination during Drilling -- Limitations -- Sampling Interval and Representation -- 2.4. Geo-PhysicalApproach -- Principle of Geophysical Approach -- 2.5. ElectricalMethod -- Principle of the Method -- 2.6. Electromagnetic Method -- Principle of the Method -- 2.7. Estimation of Groundwater Potential -- 2.7.1. Quantitative Estimation of Groundwater -- 2.7.2. Groundwater Availability for Pumping in Terms of Potential Recharge -- 2.7.3. Groundwater Availability in Terms of Safe Yield -- Determination of Specific Yield -- 2.7.4. Water Budget Approach -- Expression of Water Budget -- I-Input -- Estimation of Potential Recharge -- O-Output -- Surface Runoff -- Groundwater Discharge -- Evapotranspiration -- S - Storage -- Estimation of Absolute Change (Amount) -- 2.8. Groundwater Development Potential and Issues in Saline/Coastal Areas -- 2.9. Environmental Flow Assessment -- Building Block Method (BBM) -- Drift Method -- Relevant Journals -- Exercises -- Estimation of Groundwater Recharge -- Abstract -- 3.1. Concept, Purpose and Significance of Recharge Estimation. , Concept -- Purpose -- Significance -- 3.2. Relevant Terminologies -- Infiltration -- Percolation -- Seepage -- Actual Recharge -- Potential Recharge -- Direct/Diffuse Recharge -- Indirect Recharge -- Localized/Focused Recharge -- Artificial Recharge -- Natural Recharge -- Induced Recharge -- Base-Flow -- Darcy's Equation or Law -- Deep Drainage -- Drainage Basin -- Groundwater Basin -- Hydrologic Budget or Water Budget -- Piston Flow or Plug Flow -- Preferential Recharge -- Recharge Area -- Rejected Recharge -- Residence Time -- Residual -- 3.3. Sources and Mechanism of Recharge -- 3.4. Factors Affecting Recharge -- Soil Factor -- Topography -- Land-Surface and Vegetation -- Sub-Surface Geology -- Climate -- Rainfall Amount and Its Distribution -- Evaporative Demand of the Atmosphere -- Existence of Water Bodies or Streams -- Storage Capacity of the Aquifer -- Depth to Aquifer -- 3.5. GW Recharge-Discharge/Withdrawal Relationship and Sustainability Issues -- 3.6. Functional Form of Recharge and Limiting Conditions -- 3.6.1. Functional Form -- 3.6.2. Limiting Conditions -- 3.7. Recharge Estimation - Available Approaches and Methods -- Initiating Recharge Study/Preliminary Recharge Estimate -- Recharge Estimation Techniques -- 3.7.1. Water Budget (or Water Balance) Method -- Principle of the Method -- Boundaries Require -- Mathematical Formulation of Water Budget Equation -- Merits of Water Budget Method -- Demerits of Water Budget Method -- 3.7.2. Water-Table Fluctuation Method -- Principle of the Method -- Appropriateness/Suitability of the Method -- Assumptions -- Mathematical Formulation -- Limitations -- Merits of the Method -- Demerits of the Method -- 3.7.3. Lysimeter Method -- Measurement Procedure -- ET Measurement -- Limitations -- Merits of Lysimeter Method -- Demerits/Shortcomings -- 3.7.4. Seepage Meter Method -- Principle of the Method. , Detail Method -- Merits -- Demerits -- 3.7.5. Field Plot Water Balance -- Principle -- Detail Method -- Merits of the Method -- Demerits -- 3.7.6. Soil-Water Balance Approach -- Merits -- Demerits -- 3.7.7. Zero-Flux Plane -- Principle -- Methods -- In Absence of a Zero Flux Plane -- Limitations -- Merits -- Demerits -- 3.7.8. Darcy's Law Approach -- 3.7.8.1. Darcy's Law Method for Unsaturated Zone -- Principle -- Method -- Suitability/Limitations -- Merits -- Demerits -- 3.7.8.2. Darcy's Law Method for Saturated Zone -- Merits -- Demerits/Shortcomings -- 3.7.9. Base-Flow Discharge -- Principle of the Method -- Detail Method -- Merits -- Demerits -- 3.7.10. Numerical Method -- 3.7.10.1. Numerical Method for Watershed modeling -- Merits -- Demerits -- 3.7.10.2. Numerical Modeling for Unsaturated-Zone Studies -- Merits -- Demerits -- 3.7.10.3. Numerical Model for Saturated-Unsaturated Flow -- Merits -- Demerits -- 3.7.11. Tracer Techniques -- Characteristics of an Ideal Tracer -- 3.7.11.1. Chemical Tracer -- Perspectives and Procedure -- Merits -- Demerits -- 3.7.11.2. Isotopic Tracer -- Stable Isotope -- Radioactive Isotope -- Detail Working Method -- Merits -- Demerits -- 3.7.11.3. Environmental Tracers -- Chloride Mass Balance (CMB) Approach -- Perspectives and Methods -- Merits -- Demerits -- 3.7.11.4. Historical Tracer -- Perspectives and Procedure -- Merits -- Demerits -- 3.7.11.5. Groundwater Dating -- Perspectives and Methods -- Age from 3H/3He Data -- Use of 14C for Groundwater Age -- Recharge Rate from GW Age -- Characteristics and Considerations -- Merits -- Demerits -- 3.7.11.6. Limitations/Restrictions of Using Tracer -- 3.7.11.7. Interpretation of Tracer Results -- 3.7.11.8. Merits of Tracer Techniques over Other Methods, and Concerns -- Merits -- Concerns -- 3.7.12. Empirical Method -- Anderson et al. (1992) Formula -- Chaturvedi Formula. , Kumar and Seethapathi Formula -- Merits of Empirical Methods -- Demerits -- Future Refinement -- 3.7.13. Application of Multiple Techniques -- 3.8. Recharge Estimation Related to Aquifer Vulnerability to Contamination -- 3.9. Choosing an Appropriate Method for Recharge Estimation -- 3.9.1. Factors to be Considered in Selecting a Recharge Estimation Method -- Aim or Objective of Recharge Estimation -- Required Accuracy of Recharge Estimate -- Geomorphology of the Target Area -- Climate -- Geology -- Source and Mechanism of Recharge -- Temporal and Spatial Scale Required -- Availability of Time and Money -- Limitations/Suitability of the Methods themselves -- 3.9.2. Optimization among Different Factors and Estimating Recharge -- 3.10. Developing a Conceptual Model of Recharge/Conceptualizing a Recharge Model -- 3.11. Challenges in Predictive Relations and Recharge Generalization -- 3.12. Geological Mapping of the Recharge Areas -- General Guidelines for Mapping Recharge Area -- 3.13. Methods for Estimating/Measuring Components of Water Budget Equation -- 3.13.1. Evapotranspiration -- Direct Measurement of ET by Lysimeter -- Indirect Method -- From Field Plot -- From Crop Coefficient -- 3.13.2. Surface Runoff -- From Crop Fields -- SCS Runoff Method -- Peak Runoff from Single Storm Event -- 3.14. Worked Out Problems -- Example 3.1 -- Solution -- Example 3.2 -- Solution -- Example 3.3 -- Solution -- Example 3.4 -- Solution -- Example 3.5 -- Solution -- Example 3.6 -- Solution -- Example 3.7 -- Solution -- Relevant Journals -- Questions/Exercise -- References -- Water-Well Construction and Well Hydraulics -- Abstract -- 4.1. Construction of Water-Well -- 4.1.1. Importance of Proper Design and Construction of Well -- 4.1.2. Types of Well -- Bored Wells -- Drilled Wells -- 4.1.3. Well Construction -- 4.1.3.1. Principal Activities in Well Construction. , Site Selection -- Drilling -- 4.1.3.2. Drilling Methods -- 4.1.3.3. Definition of Relevant Terminologies -- 4.2. Well Design -- 4.2.1. Design Elements and Design Considerations -- Well Depth -- Casing Size and Material Type -- Well Screen -- Slot Size Openings -- Screen Length, Pattern, Total Open Area, and Placement -- Screen Material -- Filter Material -- Casing Materials -- 4.2.2. Design Criteria and Procedure -- Diameter of Slot/SCREEN opening -- Screen Open Area -- Length of Screen -- Position of Screen -- Screen Material -- Hydraulic Criteria/Velocity of Water -- Diameter of Screen Pipe, Vertical Velocity -- Gravel Pack/Filter Material -- 4.3. Well Completion and Development -- 4.3.1. Well Completion -- Well Casing and Sealing -- The Annular Seal -- Annulus Seal -- Well Cap -- Filter Material -- 4.3.2. Well Development -- 4.3.3. Disinfection of Well -- 4.3.4. Economic Considerations -- 4.4. Well Hydraulics -- 4.4.1. Relevant Terminologies -- Specific Capacity -- Well Capacity or Yield -- Well Efficiency -- 4.4.2. Well Yield in Aquifer -- 4.4.2.1. Flow of Water to Well in Unconfined Aquifer -- Theim Equation -- 4.4.2.2. Flow of Water to Well in Confined AQUIFER -- Theis Equation -- Derivation of the Equation -- 4.5. Pumping Test/Well Yield Test and Determination of Aquifer Parameters -- 4.5.1. Relevant Terminologies -- Residual Drawdown -- Specific Capacity -- Well Efficiency -- 4.5.2. Perspectives of Pumping Test -- 4.5.3. General Assumptions in Pumping Test -- 4.5.4. Constant Rate Test -- Observation Wells -- 4.5.5. Step Wise Test -- 4.5.6. Analysis of Pump Test Data -- Theis Method -- Cooper-Jacob Method -- Time-Drawdown Approach -- Distance-Drawdown Approach -- Theis Recovery Approach -- Limitations -- Relevant Journals -- Questions/Exercises -- References -- Management of Water Resources -- Abstract. , 5.1. Concept of Water Resources Management.