Author: David L. GundlachPublisher:
ISBN:
Category : Runoff
Languages : en
Pages : 10
Book Description
Adjustment of Peak Discharge Rates for Urbanization
Author: David L. GundlachPublisher:
ISBN:
Category : Runoff
Languages : en
Pages : 10
Book Description
Watershed Hydrology
Author: Vijay P. SinghPublisher: Allied Publishers
ISBN: 9788177645477
Category : Groundwater
Languages : en
Pages : 588
Book Description
Determining Peak-discharge Frequencies in an Urbanizing Watershed
Author: Steven F. DalyPublisher:
ISBN:
Category : Clinton River Watershed (Mich.)
Languages : en
Pages : 22
Book Description
A case study is presented of a hydrologic investigation of the Red Run Drain-Lower Clinton River watershed, an area near Detroit, Michigan, that has undergone urbanization since the 1940's. The purpose of the study was to determine peak-discharge frequencies at gaged and ungaged locations for existing and future conditions. Population density was used as an indicator of urbanization in relationships defining unit hydrograph parameters and hydrologically significant impervious area. Input parameters for a single event rainfall-runoff simulation model (HEC-1) were developed to reflect watershed conditions in the years 1940, 1950, 1960 and 1975. The input parameters were verified by reconstructing observed flood events that occurred at these points in time. Sets of synthetic winter and summer storm hyetographs were input to HEC-1 to develop a series of curves for two gaging stations that relate peak discharge to magnitude of synthetic storm for each watershed condition. The curves were used to transform the series of recorded annual peak discharges at each gage to a stationary series that reflects 1975 watershed conditions. Discharge frequency estimates were then developed for ungaged locations using winter and summer synthetic storms that were assigned exceedance frequencies consistent with actual exceedance frequencies at the gaged locations. Projections of future population density were the basis for developing HEC-1 input parameters representing year 2000 and 2025 watershed conditions. Estimates of peak discharge-frequencies for the future conditions were made at the gaged and ungaged locations using the methods described above. (Author).
Estimation of Peak-discharge Frequency of Urban Streams in Jefferson County, Kentucky
Author: Fundamentals of Urban Runoff Management
Author: Earl ShaverPublisher:
ISBN:
Category : Urban runoff
Languages : en
Pages : 327
Book Description
HEC Models for Urban Hydrologic Analysis
Author: Publisher:
ISBN:
Category : Hydraulic engineering
Languages : en
Pages : 24
Book Description
Development, Calibration and Application of Runoff Forecasting Models for the Allegheny River Basin
Author: William J. CharleyPublisher:
ISBN:
Category : Hydrological forecasting
Languages : en
Pages : 22
Book Description
Developing and Managing a Comprehensive Reservoir Analysis Model
Author: Richard J. HayesPublisher:
ISBN:
Category : Computer simulation
Languages : en
Pages : 22
Book Description
The Corps' Hydrologic Engineering Center (HEC) has developed a generalized simulation model capable of analyzing complex river-reservoir systems. The development of the model, 'HEC-5, Simulation of Flood Control and Conservation Systems' (Eichert, 1974, 1975) has been paced by the changing mission of the Corps as well as the evolution of computer systems. HEC-5 development and management, including code development, testing, documentation, training and field application experience, is discussed. (fr).
HEC-2 Water Surface Profiles Program
Author: Vernon R. BonnerPublisher:
ISBN:
Category : HEC-2 (Computer program)
Languages : en
Pages : 14
Book Description
Corps of Engineers' Experience with Automatic Calibration of a Precipitation-runoff Model
Author: David T. FordPublisher:
ISBN:
Category : Flood forecasting
Languages : en
Pages : 20
Book Description
Computer program HEC-1, a precipitation-runoff model widely used throughout the United States, includes the capability to estimate automatically any of twelve parameters necessary to model the precipitation-runoff process and the channel routing process. The parameter estimation scheme employs Newton's method to minimize a weighted sum of squares of differences between observed and computed hydrograph values. Applications of this parameter estimation procedure are presneted, and typical steps of the procedure for deterimining optimal parameter estimates are outlined. Recent efforts to improve the estimation algorithm and recent use of the calibration capability to update sequentially parameter estimates in a flood forecasting application are discussed. (Author).