ASCE MOP 28

Abstract

The first six chapters, Chapters 2 through 7, relate to the natural phenomena in the hydrologic cycle. Chapter 2 describes the formation and types of precipitation, variations in and measurement of precipi-tation, processing and interpreting precipitation records, frequency analyses of precipitation data, weather modification, and synthetic weather generation. Chapter 3 covers principles of infiltration, factors affecting infiltration and rainfall excess, infiltration and excess models, and measurement of infiltration. Chapter 4 presents the physics and theory of evaporation, interaction of surface and meteorological factors, evaporation from water surfaces, evapotranspiration from land surfaces, and regional evapotranspiration. Chapter 5 discusses ground water source and occurrence, subsurface medium, ground water movement, basin yield concepts and evaluations, recharge, ground water quality, models, and management. Chapter 6 describes the runoff process and its variability, measurement of stream flow, hydrographs, overland flow, stream flow routing, reservoir storage-yield analysis, and runoff quality. Chapter 7 covers the physical processes of snow and snowmelt; data requirements, collection, and sources; snow accumulation and distribution; snowmelt analysis and simulation; water supply forecasting; computer programs; and sample applications. <br>The next three chapters, Chapters 8 through 10, describe the predictions and effects of the phenomena described in the first six chapters. Chapter 8 presents flood characteristics and analysis, statistical analysis for estimating floods, estimating floods from rainfall, probable maximum flood, flood hazard, flood warning, and microcomputer software for flood analyses. Chapter 9 reviews the hydrologic impacts of urbanization, precipitation in the urban watershed, hydrologic losses in developing watersheds, urban runoff estimating methods, typical urban drainage design calculations, and computer model applications. Chapter 10 discusses wave theory, wind waves, ship-generated waves, wave-structure interaction, waves and currents, tides and tidal datums, storm surges, basin oscillations and tsunamis, water surface probability analysis, and selection of design water waves and levels. <br>The last chapter, Chapter 11, reviews the applications of hydrology starting with study formulation, then reviews data management, then discusses calibration and verification of hydrologic models, and ends with assessing accuracy and reliability of study results.