meteodyn WT Version 4.8

July 2014 meteodyn WT 4.8 1

1. New terrain database

New features list

July 2014 meteodyn WT 4.8 2

2. Convergence improvements

3. General improvements of the software

Two

maj

or

dev

elo

pm

ents

July 2014 meteodyn WT 4.8 3

Worldwide terrain database

Why a terrain database? Most of countries don’t have a free access to elevation and land cover information

“So, how can I obtain my terrain data?”

Can’t be directly used in meteodyn WT

Direct access to Terrain database in the interface of meteodyn WT

July 2014 meteodyn WT 4.8 4

Worldwide terrain database

Type of data Name - Zone Resolution References

Elevation data SRTM corrected by Meteodyn Worldwide

90 m National Aeronautics and Space Administration (NASA)

Roughness data Corine Land Cover 2006 Europe

100 m European Environment Agency (EEA)

Roughness data NLCD 2006 United States

30 m Multi-Resolution Land Characteristics (MRLC) Consortium

Roughness data ESA 2009 Worldwide

300 m European Space Agency (ESA)

SRTM V3 corrected by Meteodyn

Original SRTM V3 holes SRTM V3 corrected by Meteodyn no hole in data

July 2014 meteodyn WT 4.8 5

Worldwide terrain database

Type of data Name - Zone Resolution References

Elevation data SRTM corrected by Meteodyn Worldwide

90 m National Aeronautics and Space Administration (NASA)

Roughness data Corine Land Cover 2006 Europe

100 m European Environment Agency (EEA)

Roughness data NLCD 2006 United States

30 m Multi-Resolution Land Characteristics (MRLC) Consortium

Roughness data ESA 2009 Worldwide

300 m European Space Agency (ESA)

July 2014 meteodyn WT 4.8 6

Worldwide terrain database

Mandatory information Projection Center and radius of the site

Data imported in your project as soon as the download is ended.

July 2014 meteodyn WT 4.8 7

Worldwide terrain database

Important information Folder that contains the tiles is common to all users and can be moved Name of the tiles must not be changed – won’t be seen by the software otherwise

Other information

Several download can be done in the same time

If an internet connection is not available, tiles can be imported. !! Do not change the name of the file neither its extension !!

July 2014 meteodyn WT 4.8 8

Convergence improvements

Some of our CFD model + forest model parameters have been changed

Parameters of default user parameters changed Verticality = 0.5

Don’t change anything for results converged with former version Allow to obtain convergence on site previously not converged

Computation time? It depends

Around 1700 directional results tested More than 50 really complex sites (huge slopes + forested terrains) Several stability taken into account

Forest model to be used: dissipative model

Non exhaustive list:

July 2014 meteodyn WT 4.8 9

General improvements

Project window size automatically increases according to user choice “Restore the default user parameters” now available in the “User parameters”

window Forest model now available for each directional result in the Properties Tiff file now available for elevation data Shape file for roughness can now contain directly the canopy height The user can now “save and check” several sites at the same time The duration time of the synthesis is now correctly estimated “Meso-Scale” option is now called “wind atlas” option “Large domain” option no more available but internal research program in progress