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Computer simulation aimed at minimizing the effects of flooding

Developed at the UPM's Facultad de Informática, the system generates digital models of river courses

Noticia. Enviado por ingles válido desde 25/03/2010 hasta 24/03/2011 (caducado)

24 March 2010. Taking data from the LIDAR sensor and a digital photogrammetic camera, researchers from the Universidad Politécnica de Madrid's Facultad de Informática have developed an application for generating digital elevation models (DEM) and classifying land that can be applied to minimize the effects of flooding. This tool is also useful for studying the best location for public works and residential areas and for controlling and managing water resources. The Spanish companies Inclam and Heli Ibérica Fotogrametría have partnered this project.

Floods

The numerical simulation of swell waves is a conventional way of providing flood risk maps. Computer applications like these are able to realistically simulate the variable situations of river basins, as they are able to cover all factors, including fluid mechanical properties.

Some of the tools that are now used to develop 2D hydraulic models have a number of defects. For example, many do not properly account for land relief. Others use satellite images whose resolution is unsatisfactory for land classification. Additionally, today's hydraulic applications do not use either specific coefficients, like the Manning roughness coefficient, or data captured by digital cameras during photogrammetic flights for land classification.

On these grounds, applications that integrate the data generated by hydraulic simulation models in geographical information systems need to be developed to output decision making support criteria for land planning and development.

In this context, the Spanish companies Inclam and Stereocarto, in partnership with Dr. Águeda Arquero and Dr. Estíbaliz Martínez, from the Department of Computer Systems Architecture and Technology, and Dr. Marina Álvarez, from the Department of Computer Languages and Systems and Software Engineering, at the UPM's Facultad de Informática, have developed the LHIDRA-MANNING project: an automatic system for calculating the Manning roughness coefficient and digital elevation models from aerial images and LIDAR data for use in hydraulic modelling.

Technical optimization

As part of this project, the partners have optimized some of the traditional remote sensing image classification techniques for application to images taken using a large-format photogrammetic camera that generates a panchromatic (PAN), multi-spectral image with four spectral bands. The image has a spatial resolution of less than 20 cm and a radiometric resolution of 12 bits per channel. Because of the altitude at which the data are collected, the image has a better geometric resolution than images output by satellite sensors and requires no atmospheric correction.

The information supplied by the digital camera is supplemented by data captured by the LIDAR system to calculate the DEM, outputting a better altimetric accuracy (errors of less than 20 cm) and a better spatial resolution (decimetric precision).

This new system was presented at the latest Water Engineering Conference held in Madrid, where LHIDRA-MANNING, the automatic system for calculating the Manning roughness coefficient and digital elevation models from aerial images and LIDAR data for hydraulic modelling, was discussed.

 

This item on other websites

 

La Opinion 05.04.2010

PortalTIC 04.04.2010

La Opinion de Malaga 04.04.2010

Diario de Mallorca 04.04.2010

Diario Informacion 04.04.2010

SpainTechnology 31.03.2010

IndiaTimes 31.03.2010

AgroDigital 30.03.2010

Tweetmeme 30.03.2010

LaFlecha 30.03.2010

EveryDay Science 30.03.2010

PlicaZaragozame 29.03.2010

One News Page 29.03.2010

e! ScienceNews 29.03.2010

Photozcool 29.03.2010

EarthKnowledge 29.03.2010

ScienceDaily 29.03.2010

SINC 29.03.2010

Observatorio Tecnologico 29.03.2010

AlphaGalileo 29.03.2010

Planktz 24.03.2010

iAgua 23.03.2010

InfoAgua 22.03.2010

Madrimasd 22.03.2010

 

 

 

 

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