CONTENTIntroductıonBefinition of HydrologyRole and Significance of Hydrology inCivil EngineeringMethods of HydrologyHydrologic CycleFundamental Equations of Hydrology Conservation of Mass Conservation of Energy Water Balance of Earth Energy Balance of EarthExamplesPrecipitatloBFormation of PrecipitationNecessary Conditions for Precipiîation Artificial Rain Precipitation MeasurementMeasurement of Rainfall Measurement of Snow Measurement Errors Gage Network Analysis of Precipitation RecordsPrecipitation Mass Curve and Hyetograph Homogeneity of Records Filling the Missing Observations Extrapolating the Records Calculation of Areal Average Precipitation Areal Distribution of Precipitation Precipitation Bepth-Area-Buration Analysis Probable Maximum Precipitation Distribution of Precipitation in TimeExamplesMechanism of Evaporation Evaporation from Water Surface . Evaporation from Soil and Snow Transpiration and InterceptionEvapotranspiration LossesPotential and Actual Evapotranspiration Estimation of Potential Evapotranspiration Estimation of Actual Evapotranspiration Estimation of Daily EvapotranspirationExamplesInfiltrationInfiltration Capacity Infiltration Rate Infiltration Indices ExamplesGroundwaterZones of Water in the Soil Unsaturated Zone Saturated ZoneRecharge of Groundwater and Losses Groundwater Flow Flow in the Unsaturated Zone .Flow to WellsSafe Yield of Gröundwater Hydraulics of WellsDetermination of Hydraulic ConductivityExamplesStreamflow Measurement and Analysis of Data.Measurement of Stage and Water Surface Slope .Velocity Measurements .Cross-section Measurements .Discharge Measurements Rating Curve.Analysis of Streamflow RecordsStreamflow Gauging Network Computation of Daily Flows HydrographEstimation of Flows at Ungauged Sites Flow Duration Curve Flow Mass CurveExamples Sıırffaee FîowCharacteristics of a River Basin Runoff Separation Rainfall-Runoff Relationships Rational Method Runoff due to Snowmelî Runoff Dne îo SnowmeIt Areal Distribution of Runoff in Turkey ExamplesHyirograpla AnalysisElements of a HydrographSeparation of Direct Runoff and Base FlowRiver Basin as a SystemParametric Basin ModelUnit Hydrograph TheoryDefinition of Unit Hydrograph Unit Hydrograph Berivation Computation of Runoff from Rainfall by Unit Hydrograph Synthetic Unit Hydrographs Instantaneous Unit Hydrograph Unit Hydrograph Applications Flood Routing Reservoir Routing Examp!esApplications ®f Probability Thetsry ami Statistics in Hyirology Definitions ProbabilityFrequency Distribution Probability Distribution Parameters of Distribution Probability Distribution Functions Flood Frequency Analysis Correlation and Regression Analysis Hydrologic Processes Examples