scholarly journals Federal hydrologic and hydraulic procedures for floodplain delineation

2019 ◽  
Author(s):  
◽  
Keyword(s):  
Floodplain Delineation

Uncertainty analysis of a delineated floodplain

1984 ◽  
Vol 11 (3) ◽  
pp. 387-395 ◽  
Author(s):  
Edward McBean ◽  
Jacques Penel ◽  
Kwok-Lui Siu
Keyword(s):  
Uncertainty Analysis ◽  
Energy Equation ◽  
Data Uncertainty ◽  
Small Computer ◽  
One Dimensional ◽  
The One ◽  
Floodplain Delineation ◽  
Uncertainty Method ◽  
The Given ◽  
Water Profile

The delineation of floodplains involves, in most circumstances, solving the one-dimensional energy equation. However, uncertainties in the identified floodplain arise from both computational and data uncertainties; data uncertainties are concluded to be generally more significant than computational uncertainties.A method is developed to calculate the uncertainty in floodplain delineation arising from data uncertainties. The proposed method requires only HEC-2 computer output and a small computer program. Application of the method to two case studies and comparison with another uncertainty method suggest that the proposed uncertainty theory is applicable to practical situations within the given constraints. Key words: data uncertainty, floodplain, uncertainty analysis, water profile computation.

scholarly journals Changes in Geomorphic Processes in the Snake River Following Impoundment of Jackson Lake and Potential Changes Due to 1988 Fires in the Watershed

1989 ◽  
Vol 13 ◽  
pp. 99-105
Author(s):  
Richard Marston ◽  
John Shroder ◽  
James Schmitt
Keyword(s):  
National Parks ◽  
Snake River ◽  
Dynamic Features ◽  
Channel Dynamics ◽  
Environmental Controls ◽  
System Equilibrium ◽  
The Aesthetic ◽  
The Stability ◽  
Floodplain Delineation

Rivers are dynamic features of the landscape whose characteristics vary over time and space with changes in environmental controls. The Snake River in Grand Teton and Yellowstone National Parks has responded to the impoundment of Jackson Lake and subsequent changes in the operation of Jackson Dam. The 1988 fires in the Snake River watershed may also affect channel morphology. Whether a new system equilibrium might be attained and the extent to which the effects of past events might persist in the fluvial landscape are two critical questions that need to be addressed for the Snake River. The stability of the Snake River, in turn, will affect the quantity and quality of riparian habitat critical to fish and wildlife in the park. Stream channel dynamics of the Snake River in Grand Teton National Park are also intimately tied to issues of floodplain delineation and management, the aesthetic value of the river, and the quality of recreational float trips.

scholarly journals Floodplain Delineation Using HECRAS Model—A Case Study of Surat City

2016 ◽  
Vol 06 (01) ◽  
pp. 34-42 ◽  
Author(s):  
Chandresh G. Patel ◽  
Pradip J. Gundaliya
Keyword(s):  
Floodplain Delineation

Floodplain Delineation Based on Analysis of Digital Elevation Model, Soil Maps and Occurrence of Quaternary Formations

2019 ◽  
Vol 31 (1) ◽  
pp. 29-47
Author(s):  
Aleksandra Kozłowska
Keyword(s):  
Digital Elevation Model ◽  
Flood Hazard ◽  
Hazard Maps ◽  
National Research Institute ◽  
Model Soil ◽  
Main River ◽  
Digital Elevation ◽  
Elevation Model ◽  
Floodplain Delineation ◽  
Mountainous River

Abstract This paper presents a GIS based method of indicating flood extent in a mountainous river basin. Only main river with the valley is object of this analysis. The approach used in this work combines analysis of digital elevation model (DEM) obtained from LIDAR data with presence of alluvial soils and quaternary formations. In addition, in this article an attempt of calculating flood wave height for delineated floodplain is presented. The results are compared with floodplains derived from one of the products of country-scale project „IT system for protection against extraordinary hazards” (ISOK) which are flood hazard maps and with the extent of The Great Flood of 1997. Indication of the area flooded during Poland’s Great Flood in July 1997 is based on the hydrological data from Institute of Meteorology and Water Management – National Research Institute (IMGW – PIB).

Sign in / Sign up

Export Citation Format

Share Document