3. Estimation of Design Floods in Scotland and Wales

1966 ◽  
pp. 59-64 ◽  
Author(s):  
H. D. Morgan
Keyword(s):  
Design Floods

scholarly journals Impact of resolution of DEM on the calculation of design floods in a small mountainous basin

2021 ◽  
Vol 609 ◽  
pp. 012060
Author(s):  
Marija Mihaela Labat ◽  
Milica Aleksić ◽  
Kamila Hlavčová ◽  
Gabriel Földes
Keyword(s):  
Design Floods ◽  
Mountainous Basin

scholarly journals Planning of technical flood retention measures in large river basins under consideration of imprecise probabilities of multivariate hydrological loads

2009 ◽  
Vol 9 (4) ◽  
pp. 1349-1363 ◽  
Author(s):  
D. Nijssen ◽  
A. Schumann ◽  
M. Pahlow ◽  
B. Klein
Keyword(s):  
Flood Control ◽  
Large River ◽  
Control Measures ◽  
Imprecise Probabilities ◽  
Flood Events ◽  
Modeling Tools ◽  
Statistical Characterization ◽  
Design Floods ◽  
Known Unknowns ◽  
Flood Waves

Abstract. As a result of the severe floods in Europe at the turn of the millennium, the ongoing shift from safety oriented flood control towards flood risk management was accelerated. With regard to technical flood control measures it became evident that the effectiveness of flood control measures depends on many different factors, which cannot be considered with single events used as design floods for planning. The multivariate characteristics of the hydrological loads have to be considered to evaluate complex flood control measures. The effectiveness of spatially distributed flood control systems differs for varying flood events. Event-based characteristics such as the spatial distribution of precipitation, the shape and volume of the resulting flood waves or the interactions of flood waves with the technical elements, e.g. reservoirs and flood polders, result in varying efficiency of these systems. Considering these aspects a flood control system should be evaluated with a broad range of hydrological loads to get a realistic assessment of its performance under different conditions. The consideration of this variety in flood control planning design was one particular aim of this study. Hydrological loads were described by multiple criteria. A statistical characterization of these criteria is difficult, since the data base is often not sufficient to analyze the variety of possible events. Hydrological simulations were used to solve this problem. Here a deterministic-stochastic flood generator was developed and applied to produce a large quantity of flood events which can be used as scenarios of possible hydrological loads. However, these simulations imply many uncertainties. The results will be biased by the basic assumptions of the modeling tools. In flood control planning probabilities are applied to characterize uncertainties. The probabilities of the simulated flood scenarios differ from probabilities which would be derived from long time series. With regard to these known unknowns the bias of the simulations was considered by imprecise probabilities. Probabilities, derived from measured flood data were combined with probabilities which were estimated from long simulated series. To consider imprecise probabilities, fuzzy sets were used to distinguish the results between more or less possible design floods. The need for such a differentiated view on the performance of flood protection systems is demonstrated by a case study.

Proposed Swedish Spillway Design Floods in Relation to Observations and Frequency Analysis

1989 ◽  
Vol 20 (4-5) ◽  
pp. 277-292 ◽  
Author(s):  
S. Bergström ◽  
G. Lindström ◽  
H. Sanner
Keyword(s):  
Frequency Analysis ◽  
Distribution Functions ◽  
Hydrological Models ◽  
Hydrological Conditions ◽  
Design Floods

Proposed guidelines for the computation of spillway design floods in Sweden are described. The guidelines are based on the transformation of extreme hydrological conditions to floods by use of conceptual hydrological models. Floods computed according to the guidelines are compared to observations for both autumn conditions when rainfall dominates and for snowmelt conditions in spring. The highest floods are in the order of 60% of the proposed guidelines. Comparisons with frequency analysis show that the computed floods are well beyond the 10,000 year flood according to the Gumbel and Lognormal 2 distribution functions, while the results according to Lognormal 3 are more uncertain.

scholarly journals Relationship between design floods and land use land cover (LULC) changes in a tropical complex catchment

2018 ◽  
Vol 11 (14) ◽  
Author(s):  
Jabir Haruna Abdulkareem ◽  
Wan Nor Azmin Sulaiman ◽  
Biswajeet Pradhan ◽  
Nor Rohaizah Jamil
Keyword(s):  
Land Use ◽  
Land Cover ◽  
Land Use Land Cover ◽  
Lulc Changes ◽  
Design Floods

scholarly journals The Impact of Dams on Design Floods in the Conterminous US

2020 ◽  
Vol 56 (3) ◽  
Author(s):  
Gang Zhao ◽  
Paul Bates ◽  
Jeffrey Neal
Keyword(s):  
Design Floods ◽  
The Impact

Estimating design floods based on the critical storm duration for small watersheds

2013 ◽  
Vol 7 (3) ◽  
pp. 209-218 ◽  
Author(s):  
M.S. Kang ◽  
J.H. Goo ◽  
I. Song ◽  
J.A. Chun ◽  
Y.G. Her ◽  
...  
Keyword(s):  
Small Watersheds ◽  
Storm Duration ◽  
Design Floods
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