SOLWEIG - A climate design tool
Contents
1. 23 Wind direction Wd a IMPORTANT The direct beam radiation Kdir used as input in the SOLWEIG model is not the direct shortwave radiation on a horizontal surface but on a surface perpendicular to the light source Hence the relationship between global radiation and the two separate components are avkdn Kdir sin h Kdiff where h is the sun altitude Since diffuse and direct components of short wave radiation is not common data it is also possible to calculate diffuse and direct shortwave radiation by ticking the box in Figure 16 Reindl et al 1990 IMPORTANT As from version 2014a the hour time stamp is the average from the time step before i e hour 3 is the time between 2 and 3 am in an hourly time resolution is used As from version 24014a the time resolution is not set to one hour but could change based on the input meteorological data One additional file ModelledYears txt is needed as from version 2014a SOLWEIG can be used to model longer time periods during what the forcing data surface cover information and different input parameters may vary The purpose of file ModelledYears txt is to list the years which are modelled In this file Table 2 the line order is important Table 2 ModelledYears TXT in this file the line order is important Line Description Example Comment 1 Number of years that 1 Just one year will be modelled see section 4 1 for are to be run how to model multiple years 162. SOLWEIG is a computer software model which can be used to estimate spatial variations of 3D radiation fluxes and mean radiant temperature Tm in complex urban settings This document describes the computer software and the graphical user friendly interface that has been developed for the SOLWEIG model For detailed description of the model see Lindberg et al 2008 and Lindberg amp Grimmond 2011 SOLWEIG is written in MATLAB programming language This involves a certain number of advantages for the aim of this model as matrices processing are required continuously a requirement that MATLAB covers perfectly Therefore better fast and efficient results are obtained The Graphical user interface makes use of a runtime engine called the MCR MATLAB Compiler Runtime which makes it possible to run MATLAB application outside the MATLAB environment The MCR is deployed royalty free This document will help you to install and run the SOLWEIG model using the Graphical user interface It also includes handy tips and recommendation which could be used in order to optimize the model Changes from previous versions Version Changes from previous version 2014a The model is now able to run at any time interval A new format of the input met data is introduced The time stamp is now fixed i e 1400 in an hourly dataset represent the hour before 2013a A new GUI is introduced as well as options to load gridded vegetation
3. SOLWEIG A climate design tool User manual for version 2014a Last update 2 June 2014 Urban Climate Group Department of Earth Sciences University of Gothenburg Sweden Table of contents CHANGES FROM PREVIOUS VERSIONS 000 ceececceeceeeceeeseeeseeeeeeeeeeeeesecesecaecsaecsaecseecaeseaeseeeseeesereeseens 3 MIGRATION FROM 32 BIT TO 64 BIT COMPUTER ENVIRONMENTS 0 sese 4 SYSTEM REQUIREMENTS is csssssscessnds op capessets atts Sea is Ao EE ET Tr EE IEEE EEEE EE EEDE SEEE EEr ese headed 4 OTHER APPLICATIONS NEEDED BEFORE INSTALLING THE SOVYTW ARE sese esse 4 INSTALLING THE INTERFACE serina R ER A S E E 4 THE GRAPHICAL USER FRIENDLY INTERFACE FOR SOLWEIG sesseessessoesoossecsoesoossoesoesoossoesoesooe 7 STARTING THE INTERFACE T 7 MAN 9 60 1 STT ara a E a aa E A a A aa 7 STEPI FOAD DOM a a destin Hs eben eee eee es 8 STEP 2 SPECIFY OUTPUT T 13 STEP 3 LOAD CREA TE SV e tik ar eee ee eE E EE tic a E ee th en Ses hes antes aE i 13 STEP 4 LOAD METEOROLOGICAL DATA sese 15 STEPS EXECUT H TTT 17 SET MODEL PARAMETERS eearri eiere aN RE EEE eE RERIT ET auihecssttsteesalengevatieaedtateaseheties 17 OPTIONAL SETTINGS eer a A LA A ee SA eR ce 17 SEC POINE OF INCELEST aE aar Re be cs ae Fh HRH bE bose oR eSNG by danas secs b eee Hl RH EE bee 17 CALCULATE DAILY SHADING ivscccecicecccecth ek ene ec eee 19 ACRONYMS AND ABBREVIATIONS sss sese esse esse sess sees esse ees esse eee essen e resse vesse 2L Introduction
4. value of the building DSM b an area that corresponds with a marked building from the building DSM This value is automatically assigned by the application the first time the user marks the buildings Therefore if new trees are added manually this value has to be 0 0 decimal format On the contrary if there are marked buildings but not trees there will be entries with values 0 0 in all the columns excepting in the build one An example of the above vegetation DSM format is shown below ID ttype dia height trunk x y build 0 0 0 0 0 0 0 0 0 0 0 0 0 0 16873 0 2 0 1 0 10 0 30 0 5 0 128 0 133 0 17307 0 3 0 3 0 5 0 5 0 0 0 182 0 58 0 10155 0 4 0 2 0 15 0 20 0 5 0 133 0 40 0 23081 0 5 0 1 0 5 0 6 0 5 0 144 0 234 0 19425 0 Important every time a new vegetation file is saved or loaded within the interface new vegetation SVFs must be created or loaded as well see below As shown in Figure 8 it is also possible to load and edit an already created vegetation DSM Recently 3D vegetation data derived from e g LIDAR technology has become available Therefore as from version 2013a it is also possible to load already gridded vegetation DSMs into the interface The grid should be of the same spatial resolution and extent as the ground and building DSM The dialog shown when a gridded vegetation dataset should be used is shown in Figure 11 In order to generate realistic shadow patterns from vegetation a trunk zone DSM specifying
5. 2 Year Start End 2004 275 93 Year is 2004 Southern hemisphere example the day DLS DLS light saving start on day of year 275 and finished on 93 earlier in the year For northern hemisphere the start and end dates would be in the middle of the year and the start date would be smaller than the end date ap In the example below indicates comments in the file Comments are not read by the programme so they can be used by the user to provide notes for their interpretation of the contents Example of ModelledYears txt when multiple years in this case 2008 and 2009 are run 2 Number of modelled years time periods 2008 170 240 Year start of Daylight Savings End of Daylight savings 2009 172 242 Note For both years all other input files with YYYY are needed The respective output files will be created Day of Year is used in all calculations Leap years are taken into account and will be determined for each year In the current version of SOLWEIG 2041a Daylight Savings is not used and could therefore be ignored Examples of the input files is found in the test files folder STEP 5 Execute By clicking on the Execute button the SOLWEIG model will be launched Set model parameters There are a number of settings that can be made in the main frame of the interface The model parameters are divided into geographical urban and personal parameters It is possible to use the default values or to
6. automated building generation algorithm Look in the test files folder for examples on how the input data should look like There you will find DSMs meteorological data files etc Upcoming versions The SOLWEIG model is in a development process and we are constantly working on refinement and improvements of the model Our plans so far are to present these changes in one major upgrade 20 Two major changes are planned in the upcoming versions First a land use scheme will be incorporated which gives the opportunity to change surface characteristics and separate between vegetation types more explicit Second possibilities to calculate PET Physiological Equivalent Temperature will also be included This requires an estimate of wind speed which is currently not included in the model The aim is still to improve the surface temperature parameterization and the temporal resolution Furthermore a coupling with a surface energy model and a convective boundary model is in progress After this it will be possible to modify the meteorological data based on surface characteristics within the model domain Acronyms and abbreviations ASCII American Standard Code for Information Interchange DSM Digital Surface Model MCR MATLAB Compiler Runtime SOLWEIG SOlar and LongWave Environmental Irradiance Geometry SRS Software Requirements Specification SVF Sky View Factor UTC Coordinated Universal Time References Crawf
7. if they do not exist For the case of creating the building SVFs there are five SVFs images created for each SVF generation one default and one for each four cardinal points per DSM If vegetation data is used vegetation SVF option ten more SVF images are generated having a total amount of ten images They are all saved in the same zip file that has to be specified before creating the images 13 In Figure 12 the input data is already loaded thus by clicking on Close button bottom right the dialog will be hidden and the Interface will go back to the main frame which now will have enabled the step buttons number four of the flowchart ix m Load Create Building and Ground SVFs Load Building SVF Create Building SVF Building SVF not availabe m Load CreateVegetation SVFs Load Vegetation SVF Create Vegetation SVF Vegetation SVFs not availabe Close Figure 12 Load Create SVFs when both SVFs are loaded Figure 13 shown the main frame when both DSM and SVFs are loaded in the interface SOLWEIG E 5 xj File Help N SOLWEIG 2013a STEP 1 STEP 2 STEP 3 STEP 4 STEPS Load DSMs Specify Output Load Met data Extecute m Geographical location Digital Surface Model Sky View Factor Sweden Goteborg he Longitude decimal degree 14 57 Latitude decimal degree 57 7 Altitude masl x m Personal parameters Absortption shortwave 0 70 Absort
8. is a considerable larger application than the Interface itself Main frame Figure 7 shows the initial window or main frame that will be displayed every time the application is launched File Help SOLWEIG 2014a STEP 1 STEP 2 STEP 3 STEP 4 STEPS Load DSMs sn Specity Outpu gt gt Geographical location Sweden Goteborg Longitude decimal degree 11 57 Digital Surface Model Sky View Factor Latitude decimal degree 57 7 Altitude masl 3 UTC h 4 Add new location Personal parameters Not Loaded Not Loaded Created Absortption shortwave 0 70 Absortption longwave 0 95 Posture Standing S Urban parameters Albedo walls 0 20 Albedo ground 0 20 Daily shading Optional settings Time intervall 30 minutes r et tof Intere Emissivity walls 0 90 03 06 2014 x M Show hourly images of Tmrt during execution Emissivity ground 0 95 Set date alculate Daily Shad ight of wind sensor T m for PET and UTCI calculation at point of interest 2 0 anny Hea 0 02 Figure 7 Main frame at the beginning As it can be seen in Figure 7 the different steps of the model are shown in the shape of buttons at the top of the interface The flowchart has five steps starting from the Load DSMs step and ending with the Execute one Regarding the buttons in the flowchart in the beginning there is only one which is allowed to be clicked This indicates the starting point for runni
9. 0 257 0 244 0 199 0 924 0 924 0 923 0 928 0 924 0 931 0 931 0 934 0 935 0 937 0 939 After loading the corresponding data the Interface enables the other buttons in Figure 8 Since SOLWEIG version 2 0 a vegetation scheme is included Vegetation will be represented as an additional DSM consisting of trees and bushes Generation of vegetation units will be executed in a number of steps presented below First all buildings have to be identified By clicking the Create button in the Load Create vegetation DSM Optional two new figures are displayed Figure 9 Here the user can mark the buildings within the model domain Options Mark buildings Figure 9 Load DSMs step when marking the buildings 10 All edges greater than 2 meter will be marked as a building wall pixel Locations of buildings are also used even if when no vegetation DSM is used Hence it is suggested to go through the first step in the generation of a vegetation DSM process as shown below Figure 10 shows the dialog which represent a third level dialog where the vegetation DSM can be generated First one of the three standard vegetation shapes has to be selected conifer deciduous or bush The Interface will then generate a vegetation unit based on the measures inserted diameter tree height and trunk height Finally the vegetation unit has to be located somewhere within the model domain This procedure can be repeated or a vegetation unit can a
10. DSMs 2 3 A new scheme for reflection concerning the shortwave fluxes is included taking into account sunlit and shaded walls 2 2 Some major and minor bugs have been fixed such as A major bug regarding the scale of trees and bushes is resolved 2 1 Some major and minor bugs have been fixed such as Small changes in the equations for shortwave radiation The reflected part is now weighted using a fraction of shadow component instead of sun altitude angles An error in outgoing shortwave radiation equation have been fixed The generation of bushes in the vegetation DEM process is improved 2 0 A new vegetation scheme is now included The interface also has a wizard for generating vegetation data to be included in the calculations The new vegetation scheme is again slowing down the calculation but the computation time is still acceptable 1 1 Longwave and shortwave radiation fluxes from the four cardinal points is now separated based on anisotropical Sky View Factor SVF images Ground View Factors is introduced which is a parameter that is estimated based on what an instrument measuring Lup actually is seeing based on its height above ground and shadow patterns In order to make accurate estimations of GVF locations of building walls need to be known Walls can be found automatically be the SOLWEIG model However if the User wants to have more control over what are buildings and not the User should use the mar
11. comes available after DSMs are loaded and an output folder is specified No SVFs or meteorological datasets are needed Figure 16 shows an example of the result generated using the daily shading feature 19 Precentage of sun at surface on 2013 lol x a File Edit View Insert Tools Desktop Window Help USERS SRP N a aHan 100 BIS ka Fle Edt View Insert Tools Desktop Window Hep gt 80 OSGMSs e XAaecaeadc B 08 e0 70 J60 LU 50 40 30 veg shadow s e shadow eeee88 See eee EEE S sunget L 1 L 1 L L L L l L L L L L L 1 1 1 1 L l 1 L 012 34 5 6 7 8 9 1011 12 1314 15 16 17 18 19 20 21 22 23 24 Hour 100 150 200 250 Figure 16 Example of Daily Shading results Tips and hints In this section a few recommendations are presented which will help you to obtain the best result using the SOLWEIG model The model makes the most accurate estimations of the radiative fluxes if the locations of the building are known When the vegetation scheme is used the buildings is identified However using the model without the vegetation scheme results in an automated identification of the building footprints is used which introduce error due to the fact that courtyard also will be identified as buildings To resolve this create an empty vegetation DSM and then click in Do not use vegetation This makes the model use the identified buildings instead of using the
12. e radiation Kup outgoing shortwave radiation Knorth shortwave radiation from north 18 Keast Ksouth Kwest Ldown Lup Lnorth Least Lsouth Lwest Ta Tg RH Ea Esky Sstr Tmrt 10 Cl Gvf Cl_Tg Shadow SVF_b SVF_b v PET UTC shortwave radiation from east shortwave radiation from west shortwave radiation from south downward longwave radiation outgoing longwave radiation longwave radiation from north longwave radiation from east longwave radiation from west longwave radiation from west air temperature from meteorol Data calculated surface temperature relative humidity from meteorol data vapor pressure ky emissivity mean radiant flux density mean radiant temperature theoretical value of maximum incoming solar radiation clearness index for Laown Based on Crawford and Duchon 1999 Ground View Factor clearness index used for calculating T T differences Based on Reindl et al 1990 Shadow value Sky View Factor from ground and buildings Sky View Factor from ground buildings and vegetation Physiological Equivalent Temperature Universal Thermal Climate Index Calculate Daily Shading A separate feature of the interface is found in the lower left corner of the main frame namely to generate shadow patterns on for the loaded DSMs based on geographic location and day of year It is also possible to specify the interval between each shadow map generation The Calculate Daily Shading be
13. etup will create the program s shortcuts in the following Start Menu folder To continue dick Next If you would like to select a different folder dick Browse SOLWEIG 2014a Browse T Don t create a Start Menu folder Figure 4 Select start menu folder Setup SOLWEIG 2014a Select Additional Tasks Which additional tasks should be performed Select the additional tasks you would like Setup to perform while installing SOLWEIG 2014a then click Next Additional icons ri T Create a Quick Launch icon Figure 5 Create a desktop icon ixi Ready to Install N Setup is now ready to begin installing SOLWEIG 2014a on your computer le Click Install to continue with the installation or dick Back if you want to review or change any settings Destination location C Program Files SOLWEIG20 14a Start Menu folder SOLWEIG 20148 Figure 6 Ready to install SOLWEIG on your computer The graphical user friendly Interface for SOLWEIG This section explains in detail all the steps that have to be taken in order to run the SOLWEIG model by using the Interface For each step of the model some screenshots will be shown along with descriptions explaining the step s functionality and data that should be used and loaded Starting the Interface The time it takes for the interface to actually start is relatively long compared to its size 3Mb This is because the MCR is also initialized which
14. in where a building DEM can be stored In order for the DEM to be successfully loaded it has to follow the ERSI ASCII Grid format including the order of the headers ncols nrows xlicorner or xllcenter ylicorner or ylicenter cellsize NODATA_value a float number greater than zero number of columns of the matrix a float number greater than zero number of rows of the matrix a positive or negative decimal number geographic x coordinate of the lower corner of the matrix Can be either xllcorner or xllcenter a positive or negative decimal number geographic y coordinate of the left side of the matrix Must be yllcorner when using xllcorner and ylilcenter when using xllcenter a positive decimal number from 0 size of 1 pixel a positive or negative decimal number the value of no data The matrix of positive and or negative decimal numbers representing the DEM Each row is separated by a new line and each column by a blank character The size is the one specified in the ncols and nrows headers Note 1 or more blank characters including tabs An example of the above building DEM format is shown below ncols 350 nrows 350 xllcorner 39250 ylicorner 27993 cellsize 1 NODATA_value 9999 0 723 0 207 0 341 0 408 0 439 0 455 0 463 0 461 0 445 0 409 0 371 0 36 0 347 0 337 0 319 0 312 0 312 0 301 0 297 0 294 0 289 0 285 0 276 0 275 0 268
15. king tool included in the Create Edit Vegetation DEM A very simple approach taken from Offerle et al 2003 is used to estimate nocturnal Lgown Therefore Tmrt could also be estimated during night in version 1 1 Migration from 32 bit to 64 bit computer environments The SOLWEIG interface as from April 2012 is now running in 64 bit computer environments This is mainly because of the increased memory capabilities which make it possible to work with even larger model domains than before Some users might run into problems using the new 64 bit version Solutions of some of these issues are found in this guide Please read this manual through before contacting the Urban Climate Group with any further questions A 32 bit version can be available upon request Installation This section gives you information on how to install the SOLWEIG graphical user friendly Interface on a regular PC System requirements The Interface runs under WINDOWS NT 2000 XP Vista 7 64 bit platforms Other applications needed before installing the software There is one additional application that has to be installed on the PC before been able to run SOLWEIG gt Install the MCR MATLAB Compiler Runtime 8 2 This can be downloaded from http www mathworks se products compiler mcr If you are using earlier versions of SOLWEIG you should keep the corresponding MCR installed on your computer Earlier MCRs could be found at Urban Climate Gro
16. lso be removed CreateEditVegetation 15 xi Add a vegetation unit Vegetation type Conifer Total height m 29 Diameter m 15 Trunk height m 5 Locate r Remove a vegetation unit uto gt Cancel Save Figure 10 Load DSMs step when setting the vegetation units By default the Interface will allow all types of file extensions in where a vegetation DSM can be stored In order to be successfully loaded it has to follow the following format including the order of the headers ID ttype dia height trunk x y build i t d h tr x y b Where all the columns are separated by a tab or space and 11 i tree identifier a round number from 1 to infinity t tree type a round number that can only have the three following values 1 Conifer 2 Deciduous 3 Bush d tree diameter in meters a decimal number from 0 to infinity h tree height in meters a decimal number from 0 to infinity tr tree trunk size in meters a decimal number from 0 to infinity This value cannot be equal or greater than the tree height Besides the bush tree will always have a value of 0 0 for this column x X coordinate from the building DSM where the tree is located a round number from 1 to the maximum x value of the building DSM y y coordinate from the building DSM where the tree is located a round number from 1 to the maximum y
17. ng the model After loading the first required files those corresponding to the step one Load DSMs step button number 2 Specify Output will be able to be used and so forth The Interface will continue enabling the remaining steps buttons of the model when the corresponding and required input data is loaded on the active step STEP 1 Load DSMs When a button from the main frame is clicked a new dialog pops up with all the functionality and input data related to that step of the model In Figure 8 the Load DSMs step is shown in a new dialog DigitalSurfaceModels 5 x m Ground and building DSM Load No Building DSM loaded r Load Create vegetation DSM Optional Vegetation DSMs from textfile Gridded Vegetation DSMs Load ASCII grids No Vegetation DSMs loaded Close Figure 8 Load DEMs step at the beginning Figure 8 shows how the Interface specifies the action that has to be performed in order to load the input data correctly A raster DSM is essential for the SOLWEIG model to work and it could consist of both ground and building heights but also of only building structures with ground elevation equals to zero A raster DSM could be created in almost any GIS software s A brief guide on how to create a DSM in ArcGIS can be found at the Urban Climate Group webpage By default the Interface will allow all types of file extensions
18. ord TM Duchon CE 1999 An improved parameterization for estimating effective atmospheric emissivity for use in calculating daytime downwelling longwave radiation Journal of Applied Meteorology 38 474 480 Lindberg F Thorsson S Holmer B 2008 SOLWEIG 1 0 Modelling spatial variations of 3D radiant fluxes and mean radiant temperature in complex urban settings International Journal of Biometeorology 2008 52 697 713 Lindberg F Grimmond CSB 2011 The influence of vegetation and building morphology on shadow patterns and mean radiant temperature in urban areas model development and evaluation Theoretical and Applied Climatology 105 3 s 311 323 Offerle B D C S B GRIMMOND T R Oke 2003 Parameterization of net all wave radiation for urban areas Journal of Applied Meteorology 42 1157 1173 Reindl D T Beckman W A Duffie J A 1990 Diffuse fraction correlation Solar energy 45 1 1 7 21
19. ption longwave 0 95 Posture standing S Urban parameters Albedo 020 Emissivity walls Daily shading Optional settings 0 90 Time intervall Set point of Interest Emissivity ground 0 95 mors 20 minutes Calculate Daily Shading T Do not use vegetation LE 7 21 03 2013 IZ Show hourly images of Tmrt during execution Transmisivity vegetation 9 92 Figure 13 Load DENIS step when both DENIS are loaded 14 The location part right side of the dialog is used to locate the model domain at a geographic location on Earth By default the Interface provides a list of cities and their location which can be edited or removed Besides new locations can be added if the desired city does not appear on the list STEP 4 Load meteorological data Figure 14 shows the dialog that is popped up when the Load Met data button is clicked in the main frame FJ Loadtetcoroogy o Loading options T Calculate direct and diffuse radiation from global radiation m Meteorological data Load Meteorological data No meteorological data loaded Close Figure 14 Add meteorological data with data loaded As from version 2014a SOLWEIG adopts a new format of meteorological data This is done as SOLWEIG is planned to be incorporated in a coupled model system for climate sensitive applications Required inputs must be continuous i e gap fill any missing data Table 1 gives the re
20. quired and optional additional input variables Variables marked with in the comment column are not used with the current version and can be replaced with 999 0 if the user s dataset does not include the variable If a parenthesis is added the variable is optional Make certain these are not TAB delimited files By default the Interface will allow all types of file extensions in where the meteorological data can be stored In order to be successfully loaded it has to follow the following format including the order of the columns Table 1 Meteorological input data to run SOLWEIG Model refers to the name within the model code Col Variable Header name Units Comments 1 Day of year id 2 Time it 3 Decimal time dectime 4 Net all wave radiation qn1 Wm 5 Obs sensible heat flux qh Wm 15 er S 6 Obs latent heat flux ge W m 7 Obs storage heat flux qs Wm 8 Anthropogenic heat flux af Wm 9 Mean wind speed U avu1 ms 10 Mean relative humidity avrh 11 Mean air temperature Temp_C AC 12 Station air pressure Pres kDa kPa 13 Rain ph mm t 14 Incoming solar radiation avkdn Wm 15 Snow cover fraction 0 1 snow 16 Obs downward longwave radiation Idown_obs Wm 17 Observed cloud faction fcld_obs Tenths 18 External water use wuh m tt 19 Soil moisture xsmd m mor kg kg 20 Leaf Area Index lai_hr 21 Diffuse shortwave radiation Kdiff W m 22 Direct shortwave radiation Kdir Wm
21. specify new values Optional settings Some optional settings are also available If the option Show hourly images of Tm during execution is selected the results will be shown There is also an option to exclude the vegetation scheme Do not use vegetation Set point of interest Figure 15 shows the window that pops up when the button Set point of interest is clicked on the main frame 17 Set Point of Interest E ife x Point of Interest row 110 col 155 Figure 15 Set point of interest with point set In order to specify a point of interest the mouse cursor has to be used to point the cursor over the shown DSM and then click on the desired area within the map For this purpose the coordinates the cursor is pointing to in real time is shown to facilitate the point s selection The height will be referring to the centre of gravitation of a standard male 1 1 m agl The point of interest is a location where more detailed information of the model can be extracted The text file generated includes the following attributes year year month month of year day day in month hour hour of day altitude altitude of the Sun in degrees azimuth azimuth of the Sun in degrees Kdirect Direct beam solar radiation calculated of from meteorol data Kdiffuse diffuse component of radiation calculated of from meteorol data Kglobal global radiation from meteorological input data Kdown downward shortwav
22. the volume between the vegetation canopy and the ground is also needed Lindberg and Grimmond 2011 This can be loaded directly is available or be generated based on a constant value or the assumption the trunk zone is proportional to the total height of the vegetation in each specific pixel 12 LoadVegetationGrids l of xi r Canopy DSM Load Canopy DSM No Canopy DSM loaded m Trunkzone DSM Load existing grid Load grid Generate as fraction from Canopy DSM Create Fraction of Canopy DSM o 25 ISS Generate with constant height eate eee 45 H No Trunkzone DSM loaded generated Cancel Save Figure 11 Dialog for loading gridded vegetation datasets STEP 2 Specify Output Options to save a number of different grids at different temporal resolution is included both as tiff or ASCII grids An output folder needs to be specified in order to proceed to step 3 STEP 3 Load Create SVF The Interface can also be used to obtain images of sky view factor values Figure 12 shows the dialog that is popped up when the Load Create SVFs button is clicked in the main frame This is the most time consuming part of the model execution The output of the SVF images generated is again as ESRI ASCII Grids If only a ground and building DSM is loaded vegetation SVFs is not needed This step allows loading of existing SVFs or creating them
23. up webpage Installing the Interface Download the executable installation file SOLWEIG Setup exe of the Interface from the Urban Climate Group webpage and follow the installation procedure as shown below Figure 1 6 The current installation also comes with a sub version of the SOLWEIG model called SOLWIEG1D This application can be used together with hemispherical photographs and can be used to calculate SVF Tm PET and UTCI as well as display sun diagrams http www gvc gu se english research climate urban climate Select Setup Language x Select the language to use during the installation S T Figure 1 Select setup language d Setup SOLWEIG 2014a Welcome to the SOLWEIG 2014a Setup Wizard This will install SOLWEIG 2014a on your computer It is recommended that you close all other applications before Click Next to continue or Cancel to exit Setup Figure 2 SOLWEIG setup welcome window d Setup SOLWEIG 2014a Where should SOLWEIG 20 14a be installed P Setup wil install SOLWETG 20 14a into the following folder To continue dick Next If you would like to select a different folder click Browse C Program Files SOLWEIG20 14a Browse Atleast 11 2 MB of free disk space is required Figure 3 Select destination location Setup SOLWEIG 2014a Select Start Menu Folder Where should Setup place the program s shortcuts S
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