Topic
Vflo
About: Vflo is a research topic. Over the lifetime, 769 publications have been published within this topic receiving 20719 citations.
Papers published on a yearly basis
1 / 2
Papers
Book•
1 Jan 1989
TL;DR: In this paper, the authors present a GIS-based approach to the problem of flood control in urban watersheds, using the HEC-HMS (Hierarchical Environmental Control Engine) model.
Abstract: (NOTE: Each chapter concludes with Summary, Problems, and References.) 1. Hydrologic Principles. Introduction to Hydrology. Hydrologic Cycle. Weather Systems. Precipitation. Evaporation and ET. Infiltration Loss. StreamFlow and the Hydrograph. Hydrologic Measurement. 2. Hydrologic Analysis. Watershed Concepts. Rainfall-Runoff. Hydrograph Analysis. Unit Hydrograph Theory. Synthetic Unit Hydrograph Development. Applications of Unit Hydrographs. Conceptual Models. Snowfall and Snowmelt. Green and AMPT Infiltration Method. 3. Frequency Analysis. Introduction. Probability Concepts. Random Variables and Probability Distributions. Return Period or Recurrence Interval. Common Probabilistic Models. Graphical Presentation of Data. Related Topics. 4. Flood Routing. Hydrologic and Hydraulic Routing. Hydrologic River Routing. Hydrologic Reservoir Routing. Governing Equations for Hydraulic River Routing. Movement of a Flood Wave. Kinematic Wave Routing. Hydraulic River Routing. 5. Hydrologic Simulation Models. Introduction to Hydrologic Models. Steps in Watershed Modeling. Description of Major Hydrologic Models. HEC-1 Flood Hydrograph Package. Input and Output Data for HEC-1. Introduction to HEC-HMS. HEC-HMS Watershed Analysis: Case Study. 6. Urban Hydrology. Characteristics of Urban Hydrology. Review of Physical Processes. Rainfall Analysis. Methods for Quantity Analysis. Sewer System Hydraulics. Control Options. Operational Computer Models. Case Study. 7. Floodplain Hydraulics. Uniform Flow. Uniform Flow Computations. Specific Energy and Critical Flow. Occurrence of Critical Depth. Nonuniform Flow or Gradually Varied Flow. Gradually Varied Flow Equations. Classification of Water Surface Profiles. Hydraulic Jump. Introduction to the HEC-2 Model. Theoretical Basis for HEC-2. Basic Data Requirements. Optional HEC-2 Capabilities. Input and Output Features. Example of HEC-2 Input. Introduction to HEC-RAS. 8. Ground Water Hydrology. Introduction. Properties of Ground Water. Ground Water Movement. Flow Nets. General Flow Equations. Dupuit Equation. Streamlines and Equipotential Lines. Unsaturated Flow. Steady-State Well Hydraulics. Unsteady Well Hydraulics. Water Wells. Ground Water Modeling Techniques. 9. Design Issues in Hydrology. Introduction. Design Rainfalls. Small Watershed Design. Design Hydrographs for Pipes, Overland Flows, and Channels. Detention Pond Design for Flood Control. Floodplain Analysis and Design at the Woodlands-Case Study. 10. GIS Applications in Hydrology. Introduction to GIS. General GIS Concepts. Digital Representation Hydrologic Parameters. Digital Representation of Topography. GIS-Based Hydrology and Hydraulics. Common GIS Software Programs. 11. Radar Rainfall Applications in Hydrologic. Introduction. Radar Estimation of Rainfall. WSR-88D Radar System. Real-Time WSR-88D Precipitation Products. Radar to Gage Calibration. Linkages with Hydrologic Modeling. 12. Floodplain Management Issues in Hydrology. Introduction. The Era of Federal Structural Flood Control Measures. The Federal Emergency Management Agency. Floodplain Management Issues. Structural Methods of Flood Control. The Flood Control Paradox. Nonstructural Methods of Flood Control. Clear Creek Case Study: A GIS-Based Approach. Appendix A. Symbols and Notation. Appendix B. Metric Conversion Factors (SI Units to U.S. Customary). Appendix C. Properties of Water. Appendix D. Normal Distribution Tables. Appendix E. Useful Hydrology-Related Internet Links. Glossary. Index.
898 citations
TL;DR: In this paper, the authors define a fundamental hydrologic landscape unit as an upland separated from a lowland by an intervening steeper slope, and describe actual landscapes in terms of land-surface slope, hydraulic properties of soils and geologic framework.
Abstract: Hydrologic landscapes are multiples or variations of fundamental hydrologic landscape units. A fundamental hydrologic landscape unit is defined on the basis of land-surface form, geology, and climate. The basic land-surface form of a fundamental hydrologic landscape unit is an upland separated from a lowland by an intervening steeper slope. Fundamental hydrologic landscape units have a complete hydrologic system consisting of surface runoff, ground-water flow, and interaction with atmospheric water. By describing actual landscapes in terms of land-surface slope, hydraulic properties of soils and geologic framework, and the difference between precipitation and evapotranspiration, the hydrologic system of actual landscapes can be conceptualized in a uniform way. This conceptual framework can then be the foundation for design of studies and data networks, syntheses of information on local to national scales, and comparison of process research across small study units in a variety of settings. The Crow Wing River watershed in central Minnesota is used as an example of evaluating stream discharge in the context of hydrologic landscapes. Lake-research watersheds in Wisconsin, Minnesota, North Dakota, and Nebraska are used as an example of using the hydrologic-land-scapes concept to evaluate the effect of ground water on the degree of mineralization and major-ion chemistry of lakes that lie within ground-water flow systems.
495 citations
TL;DR: In this paper, a multiscale water budget model called SWAT Comparison of measured and predicted values demonstrated that each component of the model gave reasonable output and that the interaction among components was realistic This fact should allow more realistic appraisal of various land use management practices on a basin-wide scale.
492 citations
TL;DR: In this article, the authors discuss the issues of radar-rainfall product development, and the theoretical and practical requirements of validating radarrainfall maps and new radar technologies, and discuss a framework for reflectivity based rainfall estimation.
488 citations
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Performance Metrics
| Year | Papers |
|---|---|
| 2024 | 3 |
| 2023 | 15 |
| 2022 | 17 |
| 2019 | 1 |
| 2018 | 3 |
| 2017 | 24 |