Two-dimensional direct rainfall hydraulic models applied to direct calculation of hydrologic events in dams to prevent overtopping

2015 ◽  
pp. 275-286
Author(s):  
Paloma Batanero ◽  
Ignacio Martínez ◽  
Eduardo Martínez
Keyword(s):  
Direct Calculation ◽  
Two Dimensional ◽  
Hydraulic Models

A study of the stability of dynamically stable breakwaters

1991 ◽  
Vol 18 (6) ◽  
pp. 916-925 ◽  
Author(s):  
K. R. Hall ◽  
Joseph S. Kao
Keyword(s):  
Research Laboratory ◽  
Coastal Engineering ◽  
Irregular Waves ◽  
Two Dimensional ◽  
Uniformity Coefficient ◽  
Engineering Research ◽  
Hydraulic Models ◽  
Wave Flume ◽  
The Stability ◽  
Dimensional Wave

The effect of gradation of armour stones and the amount of rounded stones in the armour on dynamically stable breakwaters was assessed in a two-dimensional wave flume. A total of 52 series of tests were undertaken at the Coastal Engineering Research Laboratory of Queen's University, Kingston, Canada using irregular waves. Profiles of the structure during the various stages of reshaping were measured using a semiautomatic profiler developed for this study. Four gradations of armour stones were used, giving a range in uniformity coefficient of 1.35–5.4. The volume of stones and the initial berm width required for the development of a stable profile, along with the extent to which the toe of the structure progressed seaward, were chosen as representative parameters of the reshaped breakwater. The results indicated that the toe width formed as a result of reshaping and the area of stones required for reshaping were dependent on the gradation of the armour stones. The initial berm width required for reshaping was also found to be dependent on the gradation and the percentage of rounded stones in the armour. Key words: breakwaters, dynamic stability, hydraulic models, stability, armour stones.

scholarly journals Utility of different data types for calibrating flood inundation models within a GLUE framework

2005 ◽  
Vol 9 (4) ◽  
pp. 412-430 ◽  
Author(s):  
N. M. Hunter ◽  
P. D. Bates ◽  
M. S. Horritt ◽  
A. P. J. De Roo ◽  
M. G. F. Werner
Keyword(s):  
Surface Friction ◽  
Hydraulic Model ◽  
Observation Data ◽  
Flood Inundation ◽  
Two Dimensional ◽  
Data Types ◽  
Data Set ◽  
Hydraulic Models ◽  
Inundation Extent ◽  
Friction Parameters

Abstract. To translate a point hydrograph forecast into products for use by environmental agencies and civil protection authorities, a hydraulic model is necessary. Typical one- and two-dimensional hydraulic models are able to predict dynamically varying inundation extent, water depth and velocity for river and floodplain reaches up to 100 km in length. However, because of uncertainties over appropriate surface friction parameters, calibration of hydraulic models against observed data is a necessity. The value of different types of data is explored in constraining the predictions of a simple two-dimensional hydraulic model, LISFLOOD-FP. For the January 1995 flooding on the River Meuse, The Netherlands, a flow observation data set has been assembled for the 35-km reach between Borgharen and Maaseik, consisting of Synthetic Aperture Radar and air photo images of inundation extent, downstream stage and discharge hydrographs, two stage hydrographs internal to the model domain and 84 point observations of maximum free surface elevation. The data set thus contains examples of all the types of data that potentially can be used to calibrate flood inundation models. 500 realisations of the model have been conducted with different friction parameterisations and the performance of each realisation has been evaluated against each observed data set. Implementation of the Generalised Likelihood Uncertainty Estimation (GLUE) methodology is then used to determine the value of each data set in constraining the model predictions as well as the reduction in parameter uncertainty resulting from the updating of generalised likelihoods based on multiple data sources.

Hydraulic models of flow in the channel of an mhd generator based on the equations of a two-dimensional boundary layer

1982 ◽  
Vol 17 (1) ◽  
pp. 55-62
Author(s):  
V. A. Bityurin ◽  
V. A. Zhelnin ◽  
G. A. Lyubimov ◽  
S. A. Medin
Keyword(s):  
Boundary Layer ◽  
Two Dimensional ◽  
Hydraulic Models ◽  
Mhd Generator ◽  
Dimensional Boundary

scholarly journals USE OF A COMPUTATIONAL MODEL FOR TWO-DIMENSIONAL TIDAL FLOW

1968 ◽  
Vol 1 (11) ◽  
pp. 90 ◽  
Author(s):  
Jan J. Leendertse
Keyword(s):  
Fluid Dynamics ◽  
Numerical Solution ◽  
High Speed ◽  
Tidal Flow ◽  
Computational Techniques ◽  
Two Dimensional ◽  
New Approach ◽  
Solution Approach ◽  
Hydraulic Models ◽  
Large Memory

The numerical solution of tidal hydraulic problems has been greatly facilitated In the last decade by the development of high-speed large-memory computers. Problems which only could be studied by use of hydraulic models can now readily be studied with mathematical models if the computational techniques for solutions are developed. Unfortunately the difficulties in formulating usable methods for these complicated problems in fluid dynamics are formidable, particularly if the problems are multidimensional in space. As a result the numerical solution approach to these hydraulic problems has generally been limited and has not kept pace with the increased capabilities of the presently available computers. In this paper a new approach is given to the solution of two-dimensional tidal flow in shallow water.

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