IntroductionWater SpectrumForest SpectrumIssues and PerspectivesFunctions of WaterBiological FunctionsChemical FunctionsPhysical FunctionsSocioeconomic FunctionsMechanical FunctionsPolitical FunctionsMilitary FunctionsScience of WaterWater in HistoryHydrosciencesProperties of WaterPhysical PropertiesHydraulic PropertiesChemical PropertiesBiological PropertiesWater DistributionGlobeUnited StatesHydrologic CycleWater Resource ProblemsWater Demand and SupplyWater QuantityWater QualityWater RightsCharacteristic ForestsA Natural ResourceEnvironmental FunctionsFunctional ForestsThreats to ForestsForests and Climate ChangeForests and PrecipitationPrecipitation ProcessesForest InterceptionSnow Accumulation and SnowmeltDo Forests Increase Precipitation?Forests and VaporizationVaporization ProcessesSources of EnergyEvapotranspirationForested versus NonforestedForests and Streamflow QuantityRunoff GenerationWatershed DischargesDeforestationForest FiresAfforestationForests and Streamflow QualityWater PollutantsSources of Water PollutionWater Quality DeterminationForest PracticesForests and Stream SedimentSoil Erosion ProcessesWatershed Gross ErosionEstimation of Sediment YieldVegetation EffectsTrends in Sediment Loads of the World's RiversForests and Stream HabitatStream HabitatForest ImpactsForest FiresForests and FloodingFolklore and FallaciesFlood OccurrencesFlood MeasuresForest ImpactsWatershed Management Planning and ImplementationWatershed Programs/ProjectsWatershed InventoryWatershed AnalysisWatershed Management StrategiesWatershed Management PlansWatershed AssessmentResearch in Forest HydrologyResearch IssuesPrinciples of Field StudiesResearch MethodsThe Wagon Wheel Gap Study