Effect of growing watershed imperviousness on hydrograph parameters and peak discharge

An increasing impervious area is quickly extending over the Wu‐Tu watershed due to the endless demands of the people. Generally, impervious paving is a major result of urbanization and more recently has had the potential to produce more enormous flood disasters than those of the past. In this study,...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Hydrological processes Jg. 22; H. 13; S. 2075 - 2085
Hauptverfasser: Huang, Huang-jia, Cheng, Shin-jen, Wen, Jet-chau, Lee, Ju-huang
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Chichester, UK John Wiley & Sons, Ltd 30.06.2008
Wiley
Schlagworte:
block kriging
Earth sciences
Earth, ocean, space
Engineering and environment geology. Geothermics
engineers
equations
Exact sciences and technology
flood modelling
floods
Freshwater
hydraulic structures
Hydrology
Hydrology. Hydrogeology
kriging
Natural hazards: prediction, damages, etc
NLP
peak flow
regression analysis
SCS
storms
time to peak
urbanization
watersheds
Far East
Asia
Taiwan
floods
damage
SCS
peak flow
urban environment
kriging
regression analysis
rain water
linear programming
block kriging
drainage basins
hydraulics
NLP
discharge
flow
models
rainfall
river discharge
runoff
urban areas
urbanization
surface water
flood modelling
time to peak
hydrographs
storms
ISSN:0885-6087, 1099-1085
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:An increasing impervious area is quickly extending over the Wu‐Tu watershed due to the endless demands of the people. Generally, impervious paving is a major result of urbanization and more recently has had the potential to produce more enormous flood disasters than those of the past. In this study, 40 available rainfall–runoff events were chosen to calibrate the applicable parameters of the models and to determine the relationships between the impervious surfaces and the calibrated parameters. Model inputs came from the outcomes of the block kriging method and the non‐linear programming method. In the optimal process, the shuffled complex evolution method and three criteria were applied to compare the observed and simulated hydrographs. The tendencies of the variations of the parameters with their corresponding imperviousness were established through regression analysis. Ten cases were used to examine the established equations of the parameters and impervious covers. Finally, the design flood routines of various return periods were furnished through use of approaches containing a design storm, block kriging, the SCS model, and a rainfall‐runoff model with established functional relationships. These simulated flood hydrographs were used to compare and understand the past, present, and future hydrological conditions of the watershed studied. In the research results, the time to peak of flood hydrographs for various storms was diminished approximately from 11 h to 6 h in different decrements, whereas peak flow increased respectively from 127 m3 s−1 to 629 m3 s−1 for different storm intensities. In addition, this study provides a design diagram for the peak flow ratio to help engineers and designers to construct hydraulic structures efficiently and prevent possible damage to human life and property. Copyright © 2007 John Wiley & Sons, Ltd.
Bibliographie:ark:/67375/WNG-72DX4S8Q-K
istex:AF578B55D8C3557BD2A98C57657A5278049F788F
ArticleID:HYP6807
ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ObjectType-Article-1
ObjectType-Feature-2
ISSN:0885-6087
1099-1085
DOI:10.1002/hyp.6807