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...
Characterizing Storm Water Discharges for NPDES Management
A continuous simulation runoff yield analysis model is described which can be used to estimate runoff from any type of land use within a watershed. Such a model can be used to derive statistical...
An SCS-Based Model for Hydrologic Analysis of Watersheds
A single-event mathematical watershed model is presented in this paper to compute runoff resulting from any natural or synthetic rainfall. The formulations of the various hydrologic processes...
Runoff Prediction by Recession Curves
Based on the characteristics of the discharge hydrograph such as the rising limb and the recession curve, a simple water tank model is constructed. This water tank has cross-sectional...
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...
On the Calibration of Hydrologic Models
A procedure is proposed to calibrate hydrologic models to generate representative design flows and flood hydrographs. This procedure includes two calibration steps; event calibration and...
Design Flow Estimates for Catchments in El Dorado County, CA
A hydrologic model consisting of a rainfall-runoff model and a set of design storms is proposed for design flow calculation in El Dorado County, California. The rainfall-runoff model will...
Stochastic Modelling of Mean Monthly Runoffs for Coruh Basin, Turkey
Stochastic models of monthly runoffs for Coruh basin, Turkey are presented. Coruh basin is located on the northeast part of Anatolia near Black Sea. Three gauging stations which have about...
Stormwater Management Program for the Pittsburgh International Airport
This paper describes the Pittsburgh International Airport Stormwater Management Program which was developed to provide a comprehensive approach to stormwater management on the PIT property,...
Stormwater Management Practices in New Jersey?Suggestions for Improvements
The State of New Jersey, due to large population density and intensive development, has become a frontier in regulating the stormwater runoff. This paper presents an overview of current...
Global Search Technique to Calibrate Rainfall Runoff Models
The calibration of rainfall-runoff models in hydrology has not yet reached a satisfactory solution, using either manual or automatic procedures. This paper introduces a simple conceptual...
Impact of Surge Irrigation on Furrow Water Advance
Surge irrigation was compared to continuous flow in Nebraska from 1983 - 1990. As a result of surge irrigation, advance inflow times were reduced an average of 20 percent compared to continuous...
Estimating Watershed Runoff fro Lightning Data?A Case History
A major problem in the application of hydrologic models to ungaged watersheds is the lack of necessary rainfall data. In most cases watersheds gaged for streamflow have no or only one...
Estimating Runoff from Precipitation and Temperature
Increasing demands for water and the global climate change resulting from the CO2 buildup in the atmosphere require an improved evaluation of surface-water...
Characterization of Thunderstorm Rainfall for Hydrologic Modeling
Rainfall and runoff records for 30 events from a 630-hectare subwatershed on the USDA-ARS Walnut Gulch Experimental Watershed in southeastern Arizona were used to estimate the desirable...
Effects of Agricultural Drainage on Water Quality in the Lower Mississippi Valley and Gulf Coastal Region
Sediment and nutrient (N, P, K) losses were measured from research plots with surface drainage only and from plots with both surface and subsurface drainage for all or part of the decade,...
Case History: 100-Year Flood Event in San Francisco
San Francisco experienced a 100-year storm in the winter of 1981-2. This is a report of the flooding damage from this event and the actions that the City took to resolve the flooding problems....
The Separated Flow Around a Circular Bridge Pier
The unsteady separated flows around a flat plate/cylinder junction and a scour hole/cylinder junction were investigated experimentally. The flow in the plane of symmetry was presented....
Multi Objective Detention Outlet Control Structure
Increasing numbers of stormwater management ponds are being included in the design of urban and rural drainage projects. This is in part due to the environmental outcry to clean up our...
Urban Storm Water Instrumentation: a Field Observation
The Dallas-Fort Worth, Texas metroplex has 7 cities with populations of at least 100,000 that are required to meet national Pollutant Discharge Elimination System (NPDES) permitting requirements...
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