Formulation of a Hydrologic Model, for Use with Remotely Sensed Data
Research is currently being conducted at the Pennsylvania State University, as well as, many other sites, in the area of Geographical Information Systems (GIS) and implementing its application...
A Unified Approach to Flood Frequency Analysis
Most stochastic hydrologic studies are based on statistical distributions that are pre-selected without giving consideration to the applicability of the distribution to a particular data...
Hydrologic Regionalization Using a Homogeneity Test
A framework is presented for a regionalization method with a region of influence (ROI) approach. The methodology explicitly incorporates a homogeneity test in the process of selecting...
Probabilistic Calculation of Design Floods?SPEED
The probabilistic calculation of design floods was initiated in the 60s to overcome statistical calculation uncertainties. SPEED takes up and expands this original concept in the form...
GIS-Integrated Surface Hydrology System
A GIS-based stormwater management system has been developed for the Pasco County Board of County Commissioners. The model draws all spacial data including watershed parameters, network...
Impact of Digital Elevation Model Grid Size on Extracted Drainage Parameters
The dependence of extracted drainage network properties on the spatial resolution of DEMs is investigated for a study basin. A series of raster DEMs of increasing cell size is generated...
Water Resources Management Using a Geographic Information System over a Wide Area Network
To assist in the management of water resources in the Santa Ana River Basin, in Southern California, the Bureau of Reclamation in Denver, Colorado and the Santa Ana Watershed Project Authority...
Fate/Transport Modeling of Immiscible LNAPL in Unsaturated Aquifers
In the past ten years since enacting CERCLA and SARA regulations there is a lack of model to adequately address the fate/transport of immiscible constituents in groundwater systems. This...
Simulation of Contaminant Migration Under Conditions of Declining Ground Water Levels
A ground water flow and transport model was developed to simulate the migration of contaminants originating from an industrial site. The development and calibration of the model were based...
Pumping or Slurry Walls?Which Works Best for Groundwater Containment?
Results of a numerical optimization model capable of designing containment systems for sites with three-dimensional groundwater flow indicate that site hydrogeology and economic considerations...
National Weather Service Operational River Forecasting in a UNIX Environment
The mission of the National Weather Service (NWS) includes providing river and flood forecasts and warnings for protection of life and property, and providing basic hydrologic forecast...
Snow Estimation?A GIS Application for Water Resources Forecasting
In the Western United States approximately 75 percent of the annual runoff results from snowmelt. Observations of the snow cover provide an important source of information for forecasting...
A National System for Threshold Runoff Estimation
Threshold runoff is the amount of effective (or excess) rainfall of a given duration uniformly distributed over a certain catchment that is just enough to cause flooding at the outlet...
Manning's n From Experiments with Rainfall-Runoff on Portland Cement Concrete Surfaces
Experiments were conducted under artificial rainfall on Portland cement concrete (PCC) surfaces with variable mean texture depths (MTD) and slopes (S). Rain rates were varied up to 3 in/hr...
Storm Sewer Analysis & Design Utilizing Hydrographs
In this paper a computer model, designated STORM.HYD, for the analysis and design of storm sewer systems utilizing a hydrograph procedure is presented and discussed. This model which actually...
Field-Scale Research at the TVA Columbus Groundwater Research Test Site
TVA has been conducting large-scale field experiments at their Columbus Groundwater Research test site at Columbus Air Force Base since 1983. This work has been performed in cooperation...
Decision Support System for Water Supply Management
Water supply management is one area in which subjective decision making becomes necessary. Knowledge based decision support system is proposed for use in operation and management of an...
Prediction of Water Availability in River Headwaters and Control of Facility Water Demand in Response to River Flows
As part of the permitting and design of a power plant, the ability to supply cooling water subject to permit and availability constraints was investigated. As a first step, a synthetic...
Sophisticated Computer Tools for Water Management
Sophisticated new computer tools were applied to develop a water management plan for Nassau County, Long Island. A regional groundwater flow model and two 3-dimensional saltwater intrusion...
Development of an Expert System for Urban Runoff
The U.S. EPA's Storm Water Management Model, SWMM, (Version 4.20, 1988) is a comprehensive water quality and quantity mathematical model for simulation of urban runoff in storm and combined...
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