Difference between revisions of "WRF-Fire development notes"

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== Short-term==
+
:''Main article: [[WRF-SFIRE user guide]]. To get the software, see [[How to get WRF-Fire]].''
−
These are tasks where what to do it is already known, all that remains is to find the time to do it.
 
−
* Read the topography from a file in an ideal run
 
−
* Input to the fire model the gradient rather than terrain height. ''See [[Talk:WRF-Fire wish list#Proposed computation of smooth terrain gradient|discussion]].''
 
−
: This will allow the gradient to be smoothly interpolated in preprocessing in the WPS or in setting up ideal cases. No artificial terrain smoothing is needed. The current scheme interpolates terrain height linearly, and if the mesh the terrain is interpolated from is much coarser than the fire mesh, this results in gradient jumps along the terrain mesh lines. Then, the  fire spread rate jumps along the terrain mesh lines.
 
−
* Better quadrature for fuel left
 
−
: The current scheme is second order accurate when all 4 corners of a fire mesh cell are on fire, and exact when all 4 corners are not on fire. In the case when only some of the 4 corners are on fire, the only requirement is that the transition is continuous; the scheme may not be very accurate. This affects the amount of heat output in from a cell in the timesteps when the fireline crosses the cell.
 
−
* A standalone driver for the fire code that is independent of WRF.
 
−
: This is how WRF-Fire was originally developed and such driver was available until late 2008 or so. But, then it fell into disuse and the Fire has grown into the WRF over time.
 
  
−
==Long-term==
+
This page tracks activity in the [[WRF-Fire]] and related software development. All members of the community are welcome to [[Open Wildland Fire Modeling E community Wiki#How to get an account|get an account]] and [http://www.openwfm.org/w/index.php5?title=WRF-Fire_development_notes&action=edit edit].  
−
These are more complex tasks or research projects, where the method of attack may not be completely clear yet.
 
  
−
* Gradual ignition from a point or a line, without limitation on the initial radius.
+
==Wish list==
−
: The current scheme requires that the ignition area is several fire mesh steps large. When such area ignites all at once, all the heat is output to the atmosphere at once, instead of being output gradually and allowing ground layer circulation to develop over time.  
+
 
−
* Canopy fire
+
:''Add your suggestions or plans here. If you want to comment on any of the items, please start a new section of the [[Talk:WRF-Fire development notes|talk page]] and link to it here.''
−
: Canopy fire colocated with ground fire is easy. A separate canopy fire would be harder.
+
 
−
* Output to WRF-Chem
+
* Heat flux extinction depth dependent on fuel type and possibly times step
−
: Output of the combustion products into WRF is also needed to visualize smoke.
+
* Interpolate by angle between different backing, flank, and forward spread rates.
 +
* Rework the propagation scheme so that the speed is computed only once per time step instead inside the right-hand-side in the Runge-Kutta method.
 +
* Add flux limiter option as in [http://fire.nist.gov/bfrlpubs/fire09/art023.html Rehm and McDermott 2009].
 +
* Flank spread rate as a function of base rate and TKE/turbulent fluxes
 +
* Turn off artificial diffusion for good
 +
* Implement full [http://www.forestencyclopedia.net/p/p662/c/c2490/quick_citation_view BURNUP] algorithm instead of the simplification.
 +
* Keep standalone model working.
 +
* Add a canopy fire model for passive (colocated with surface fire) canopy fire.
 +
* Parametrize ignition startup. See [[Talk:WRF-Fire development notes#Parametrized_ignition|discussion]].
 +
* Input fuel moisture from the WRF surface model. See [[Talk:WRF-Fire_development_notes#Moisture_model|discussion]].
 +
* Better level set method: High-order ENO and [http://www.math.ucla.edu/~yanovsky/LS.htm WENO], [http://ccm.ucdenver.edu/wiki/Jan_Mandel/Blog/2011_Feb_Mar#February_14:_CCM_Colloquium:_Olivier_Desjardins discontinuous Galerkin].
 +
* Rewrite the level set method so that the level set function is ignition time minus current time and get rid of the separate '''tign''' array.
 +
* Use the [http://www.fire.org/index.php?option=com_content&task=category&sectionid=2&id=31&Itemid=295 Fire SDK] to compute ROS.
 +
* ROS model from [http://dx.doi.org/10.1016/j.combustflame.2009.07.010 Balbi et al 2009].
 +
* Force the fire to a given location from a file read on restart. This will require fire history replay and atmosphere spin-up. 
 +
* Modify fuel from a file on restart to reflect suppression efforts.
 +
* Ignition & fire modification from MODIS fire detection.
 +
* Add fractional fuel volume to fuel categories and generate random fuel coverage.
 +
* Add other variables in the [[wikipedia:http://en.wikipedia.org/wiki/National_Fire_Danger_Rating_System|National Fire Danger Rating System]] as diagnostics to WRF output.
 +
 
 +
==In progress==
 +
 
 +
:''When you start on an item from the wish list, please move the item here and add a link to the branch where you work on it.''
 +
 
 +
* Clamp ignition point to the nearest cell center to avoid delay, see also [[WRF-Fire ignition]]
 +
* Fire cell-based fire propagation to get ignition time in lieu of a level-set function {{WRF-Fire-branch|vk/mergge}}
 +
* Assimilation of station data into the fuel moisture model {{WRF-Fire-branch|mv/moisture}}
 +
* Ignition from a given fire perimeter, with atmosphere and fuel consumption spin-up, by specifying ignition times. See [[Talk:WRF-Fire development notes#Fire spin-up|discussion]].
 +
* Real test problems with real fire data comparing fine and coarse resolutions.
 +
* Better quadrature for fuel left: The current scheme is second order accurate when all 4 corners of a fire mesh cell are on fire, and exact when all 4 corners are not on fire. In the case when only some of the 4 corners are on fire, the only requirements are that the transition when nodes ignite is continuous and monotonous. In that case, the scheme may not be very accurate. A better scheme would be accurate in more cases and have natural invariance properties. {{WRF-Fire-branch|jm2/mkim}} {{WRF-Fire-commit|4cf71f8d9e4309281321ad7d38e4f028a005fa8a|last commit}} {{WRF-Fire-branch|vk/test}}
 +
:This affects the amount of heat output from the cell in the timesteps when the fireline crosses the cell.
 +
* {{ccm|Data_assimilation_seminar|Data assimilation}}
 +
* Dynamically determine midflame height and interpolate the wind there. See [[Talk:WRF-Fire development notes#Fuel height|discussion]].
  
 
==Done==
 
==Done==
  
−
* <s>Restart</s> done
+
:''Move the item here when done and add a link to the contributor's last commit before the merge into master. Links to major milestone events can be also added to the timeline.''
 +
 
 +
===2004===
 +
 
 +
* Ned Patton and Janice Coen propose WRF-Fire in a [http://www.mmm.ucar.edu/mm5/workshop/ws04/Session9/Patton_Edward.pdf workshop paper]  and formulate the fundamental principles of how to combine WRF with the fire spread model from [[CAWFE]].
 +
 
 +
===2005===
 +
 
 +
* Standalone fire model from CAWFE rewritten in F90 by Ned Patton received Mar 31 2005
 +
 
 +
===2006===
 +
 
 +
* John Michalakes writes specs for support of fire grids in WRF Feb 6 2006
 +
 
 +
===2007===
 +
 
 +
* Alternative implementation of fire grid in nested domains in WRF by Jon Beezley Feb 29 2007
 +
* WRF-Fire development started from the WRF+CAWFE tracers code received from Ned Patton, Jon set up the git repository {{WRF-Fire-commit|b7ed4f2e4cd729c659d086efb86ecaca74919ff8|Jun 6 2007}}
 +
* Matlab prototype of level set method working Aug 30, 2007
 +
* Imported a modular rewrite with a new standalone level set code, called SFIRE {{WRF-Fire-commit|7b72b87820be21e0febba943f7325e66839016e5|Sep 5 2007}}
 +
* WRF+spread by level set coupled code working {{WRF-Fire-commit|c073b70ef91f4458092cf0a7ecf9163aed5860ea|Nov 2 2007}}
 +
* Paper with description of WRF-Fire and data assimilation [http://arxiv.org/abs/0712.3965 posted on arXiv Dec 24 2007]
 +
* Ignition controlled from namelist {{WRF-Fire-commit|2439f24ff443ec18c5ff5812af456de30fb24636|Dec 24 2007}}
 +
 
 +
===2008===
 +
* Change nodes on the fire mesh from corners to centers {{WRF-Fire-commit|af413df0557a49ca56db20ff3436b14c7bccee21|Feb 10 2008}}
 +
* WPS support {{WRF-Fire-commit|94a84b5b0170d8771102ff7fe25040a716268caf|3 Aug 2008}}
 +
* MPI support {{WRF-Fire-commit|0509e9b746cf671922f1db96667d7f52ab947563|Oct 23 2008}}
 +
* Cleanup, delete standalone driver and the CAWFE tracer code {{WRF-Fire-commit|a3f839e50ebcf7e068c8aa0266401220bc09f2ec|Nov 18 2008}}
 +
* Landfire data conversion {{WRF-Fire-commit|932a2d8b3e926bb193b2af07c1ba6410aa0e7e01|Dec 15 2008}}
 +
 
 +
===2009===
 +
* Distributed memory (halos) {{WRF-Fire-commit|0b5a20e6d0c88a1771a781c57307df252a213a7b|Jan 7 2009}}
 +
* Approved by UCD and NCAR for public release {{WRF-Fire-commit|76fac8823d0a81920de150a1061b95cd7717b0a9|Mar 17 2009}}
 +
* Set up nested ideal case {{WRF-Fire-commit|aed943498d9ed9c2745151d1f4a63561ed7b5b22|May 4 2009}}
 +
* WPS support for fire grid and nesting {{WRF-Fire-commit|4c86cf15408046b28a4c725fea80a9fc15ca1a7e|7 May 2009}}
 +
* Paper with a description of the WRF-Fire and data assimilation [http://dx.doi.org/10.1109/MCS.2009.932224 published in June 2009]
 +
* Add namelist.fire to define fuel categories {{WRF-Fire-commit|c978b4ad2e83788d21c72dd93b8ec7eaea5a8c90|20 Sep 2009}}
 +
* Interpolate in the computation of fuel_left locally to save stack memory {{WRF-Fire-commit|2ac779ca139bd84e5da858a155d1efc2559b238d|Oct 10 2009}}
 +
* [[How to visualize WRF-Fire output in Matlab|3D visualization in Matlab]] {{WRF-Fire-commit|9237c5529ee03a53d14c448a5fabefc13704819a|Nov 3 2009}}
 +
* [[How to visualize WRF-Fire output in VisTrails|Visualization in VisTrails]] and [[Supercomputing 2009 Demo]], Nov 15 2009
 +
 
 +
===2010===
 +
* Support for WRF restart {{WRF-Fire-commit|fd0219bce87b332b8abb55558c6323f2fc6dc2be|16 Jan 2010}}
 +
* Control in namelist the initial atmosphere perturbation (bubble) in ideal run, off by default. {{WRF-Fire-commit|993cd88d2e2ec6ed84ada027bf5a483ac686c163|27 Feb 2010}} See  [[Talk:WRF-Fire development notes#Bubble|discussion]].
 +
* Version {{WRF-Fire-commit|b6fe89aeb71d941e91530aafcf2f5b183a44fc37|19 Feb 2010}} [[Fire code in WRF release#3.2|released with WRF 3.2]] on [http://www.mmm.ucar.edu/wrf/users/wrfv3.2/updates-3.2.html Apr 2 2010]
 +
* Hyperbolic vertical mesh grading in ideal run not only exponential. {{WRF-Fire-commit|580450739d07b57467f2ce50e1d898029fa47fca|Mar 9 2010}} 
 +
* Fetch high-resolution geogrid data automatically {{WRF-Fire-commit|3bebc4f46f72de3cbfcebd902879098de1122c23|Apr 27 2010}}
 +
* Walking line ignition (as the fireman walks igniting the fire) {{WRF-Fire-commit|acf57d48e09c66826dd8defc87a6dc800627a2e5|23 May 2010}}
 +
* Basic [[How to visualize WRF-Fire output in VAPOR|visualization in VAPOR]]. {{WRF-Fire-commit|1e710fc81479ea71ed74dd9903da9917fc9dcd93|May 26 2010}}
 +
* Merge git repository with WRF and WPS 3.2  {{WRF-Fire-commit|0c084a8e4efeda74c67f62e79393dcec3b21e2d5|Jun 12 2010}} [http://mailman.ucar.edu/pipermail/wrf-fire/2010-June/000046.html announcement]
 +
* Interpolate the terrain gradient to the fire mesh instead of differencing an interpolated terrain height. {{WRF-Fire-commit|80d70fb74bea0e09ef0f635bd90fbe657582a79d|Jun 14 2010}} See [[Talk:WRF-Fire development notes#Proposed computation of smooth terrain gradient|discussion]].
 +
* Replace includes for fire parameter arrays by a derived type. {{WRF-Fire-commit|38007163901e413a8952abd3d600fc8eba24d103|Jun 14 2010}}. See [[Talk:WRF-Fire development notes#Ugly includes|discussion]].
 +
* Resurrected a standalone driver for the fire code that is independent of WRF for diagnostics. {{WRF-Fire-commit|6464357566b780c12d1d71dc2a144a27ed23217b|20 Jun 2010}} See [[Talk:WRF-Fire development notes#Standalone driver|discussion]].
 +
* Surface initialization in ideal runs allows for defining surface properties like roughness, ground temperature, albedo etc., required by soil models and radiation codes. See [[Talk:WRF-Fire wish list#Surface Initialization|discussion]]. {{WRF-Fire-commit|5eb128225f87b727f30ce11f9cb07b637fb62786|Jul 6 2010}}
 +
* Reading from a file in an ideal run: {{WRF-Fire-commit|d15ece139d3dbd69badfbb5d1c8f1cb857c53132|land use}}, {{WRF-Fire-commit|8d204c4348509cb2efd185cadc4073971ea95ecc|fuel categories}}, {{WRF-Fire-commit|45415cbb515cd4d7dbe0828b11b51b91bf993ae4|topography}} Jul 22 2010
 +
* Vertical wind profiles in Matlab for diagnostics {{WRF-Fire-commit|bee953f99cdcd5260389fa3ab5ef5a7529770e2e|Sun Jul 25 2010}}
 +
* Interpolate wind to a given height (the same  for all fuels) from log profile, and set the height as fire_wind_height in the namelist. [http://github.com/jbeezley/wrf-fire/blob/76d3724e5ce9a69ba51ed650667058e9e583ae21/wrfv2_fire/phys/module_fr_sfire_driver.F#L1023 Sep 11 2010], added wind reduction factor with defaults per Behave {{WRF-Fire-commit|dce06344012c38151fef29b2924b9fc2de6a71cb|16 Sep 2010}}
 +
* Interpolating geographic coordinates to the fire mesh in WPS {{WRF-Fire-commit|d7ebe29f00b60e03d4f93c1ea0b0013b5f96fb6b|17 Sep 2010}}
 +
* [[How to diagnose fuel properties in WRF-Fire|Rate of spread diagnostics]] {{WRF-Fire-commit|334bf9417b5397ed3692b8f469a4914ed433e051|16 Sep 2010}}.
 +
* Support for NetCDF 4 output files based on HDF5 {{WRF-Fire-commit|06c276f324873bc4c6f82c27298430435989ab97|16 Oct 2010}}.
 +
* Subscale ignition with zero initial radius. See [[Talk:WRF-Fire development notes#Gradual_ignition|discussion]]. {{WRF-Fire-commit|c28da1ac95eda7cda822df60e8051e7500873b19|Nov 2, 2010}}
 +
 
 +
===2011===
 +
* [[Vertical wind interpolation|Vertical log interpolation of the wind to different heights for different fuels]]. See [[Talk:WRF-Fire_development_notes#Wind_interpolation_to_different_heights_for_different_fuels|discussion]]. {{WRF-Fire-commit|72219b996f0dbe6af16cd7afdcc39e036c751156|24 Feb 2011}}
 +
* Ignition time interpolation for better quadrature of fuel left {{WRF-Fire-commit|d9cfc6e0988ed90cc96146a23d65a35bb5bad8d8|March 16, 2011}}. See [[WRF-Fire development notes#Better quadrature for fuel left|discussion]].
 +
* Added independent adjustment factors of base spread rate, wind correction, and slope correction to fuel description {{WRF-Fire-commit|43a7425b36dd7fdc4b3784c6827cb7c44605d748|Mar 23, 2011}}
 +
* Perimeter ignition from specified ignition times on the whole domain, allowing for atmosphere and fuel consumption spin-up. {{WRF-Fire-commit|716cf59c2313e3bb483a57db02211d17b8d095f7|Mar 24, 2011}} in ideal run. See [[Talk:WRF-Fire development notes#Fire spin-up|discussion]].
 +
* WRF-Fire [http://mailman.ucar.edu/pipermail/wrf-fire/2011-April/000052.html released with WRF 3.3 Apr 6, 2011]. The release code is based on the {{WRF-Fire-commit|fa26d08d8154124ac51514b11bc671eb312e20f8|Nov 20, 2010}} version with bug fix {{WRF-Fire-commit|b964224219585ab198d58510c8f7a0cf129b1990|Jan 17, 2011}}, with [[Changes in WRF-Fire 3.3 release|further changes made at NCAR]].
 +
* Started using the name [[SFIRE]] instead of [[WRF-Fire]] for the whole code, June 2011. ''sfire'' was used throughout the code already.
 +
* Reference paper [http://dx.doi.org/10.5194/gmd-4-591-2011 published] in [http://www.geoscientific-model-development.net GMD] July 7, 2011.
 +
* Timing from [http://www.cesm.ucar.edu/ ESMF] [http://www.mmm.ucar.edu/wrf/users/docs/user_guide/users_guide_chap7.html#_Toc75337319 structures] to support variable time step and ignition in a restart run. {{WRF-Fire-commit|e062dbf62b7591e71a486a7c512efd75e48ed9a1|Jul 24, 2011}} See [[Talk:WRF-Fire development notes#Ignition_Time|discussion]].
 +
* [[Users guide]] moved to the wiki, including existing [[List of howtos|howtos]] as chapters. [http://www.openwfm.org/w/index.php5?title=Coupled_atmosphere-wildland_fire_model_WRF_and_SFIRE_users%27_guide&action=history August 2, 2011]
 +
* Spread vector and [http://www.forestencyclopedia.net/p/p486 Byram's fire intensity]  to estimate the severity of a potential fire for a fire danger rating map {{WRF-Fire-commit|52c4e1595e08a98059ae33c0592bee3d3c0f2bb4|Aug 26, 2011}}
 +
* Restart from wrfout (cycling=.true.) {{WRF-Fire-commit|2b7c8f19382d5d3269e604bf6ba180a0ed8aec44|Sep 16, 2011}} See [[Talk:WRF-Fire development notes#Restart_from_wrfout|discussion]].
 +
* Spatially variable moisture as a part of WRF input {{WRF-Fire-commit|5a6c4b8c06a0aef126ee60a1541744aaaf62c2e5|Sep 27, 2011}}
 +
* Standalone model running from WRF atmospheric state. {{WRF-Fire-commit|168fbfaa8a62061b51999001dc55162e2ac3a798|Oct 28 2011}} See [[Talk:WRF-Fire development notes#Standalone_driver|discussion]].
 +
 
 +
===2012===
 +
* Integrated [[fuel moisture model]] with input from WRF variables, based on the Canadian fire danger rating system {{WRF-Fire-commit|763044cd62eaaec5b92c14462f6e25bdddf4d643|Mar 10, 2012}}. See [[Talk:WRF-Fire_development_notes#Moisture_model|discussion]].
 +
* [[Coupling with WRF-Chem|Smoke transport by WRF-Chem]] tracer {{WRF-Fire-commit|e7b52ab1baef2565ae1743a25bc1ed7f7f2fc109|April 21, 2012}}
 +
* Multiple fire time steps in a single atmospheric step, for stability with highly heterogenous fuels {{WRF-Fire-commit|773cacd01f4401f69d5ab4a0877e3a0a5a32abad|Mar 30, 2012}}
 +
* Fire area and sensible heat flux defined by bitmap images from a satellite or airborne sensor, in an ideal run  {{WRF-Fire-commit|479c944f05ee22a9cbb5d634594975f48c4bbb4c|Jul 27, 2012}}
 +
* Fixed fire of a circular shape, stationary or moving along a line, with a time varying heat flux {{WRF-Fire-commit|778a0c9b3846140221af539ace052c32570de87b|Jul 29, 2012}}
 +
* Two validation papers accepted: Santa Ana fire {{arXiv|1202.3209}} in Forest Management and Ecology and FireFlux  {{arXiv|1206.3345}} in Geoscientific Model Development Discussions [[Publications#Journal_papers_2|December 17, 2012]]
 +
 
 +
===2013===
 +
* [[Coupling with WRF-Chem]] RADM2 and MOZART models {{WRF-Fire-commit|d00789fe5f80976111024f9cdb03ca63f5900478|Jan 17, 2013}}
 +
*  [[Assimilation of RAWS fuel moisture data]], Apr 25, 2013
 +
* Utility for choosing [[WRF-Fire ignition|ignition points]] on the mesh {{WRF-Fire-commit|e5b6a70fb937534e6cc5868b727fb941bfc04f8a|Jun 15, 2013}}
 +
* [http://ccm.ucdenver.edu/reports/rep316.pdf Reference paper] describing new features since 2011 and [http://mops.gov.il/English/HomelandSecurityENG/NFServices/Pages/FirePredictionSystem.aspx operational deployment in Israel] Oct 9, 2013
 +
 
 +
===2014===
 +
*  [[Assimilation of RAWS fuel moisture data]] in standalone
 +
===2015===
 +
===2016===
 +
* [[Fire replay and cycling]] {{WRF-Fire-commit|efd663a93ad932a5bb3b73d32c5ff8a457d75a85|Apr 28, 2016}}
 +
 
 +
==Back burner==
 +
 
 +
:''Items from the wish list that are around for a long time or may never be done should be moved here.''
 +
 
 +
* Merge [http://mailman.ucar.edu/pipermail/wrf-fire/2011-April/000053.html additional changes] [[Fire_code_in_WRF_release#WRF_3.3|made independently in the WRF 3.3 release]].
 +
* Convert ignition namelist variables into arrays for multiple ignitions.
 +
* Add running (not colocated with surface fire) canopy fire.
 +
* Support [http://www.dtcenter.org/wrf-nmm/users/ WRF-NMM] in addition to [http://www.mmm.ucar.edu/wrf/users/ WRF-ARW]
 +
* Take the winds from a given distance behind the fireline, and set the distance in the namelist.
 +
* Add fuel models & fuel modeling schemes, esp. Scott-Burgan categories. Input the same fuel description files as [[BehavePlus]] and [[FARSITE]].
 +
* Generate input data for [[WFDS]].
 +
 
 +
==See also==
 +
 
 +
* [[How to get WRF-Fire]]
 +
* [[List of WRF-Fire pages]]
 +
* [[Users guide]]
 +
* [[Fire code in WRF release]]
 +
 
 +
==External links==
 +
 
 +
* {{ccm|Data_assimilation_seminar_to_do_list|Data assimilation seminar to do list}}
 +
* {{ccm|Jan_Mandel/Blog|Jan Mandel's blog}}
 +
* [http://repo.or.cz/git-browser/by-commit.html?r=wrffire.git Commit graph]
 +
* [http://www.mmm.ucar.edu/wrf/WG2/WRF_conventions.html WRF Coding Conventions]
 +
* [http://www.mmm.ucar.edu/wrf/users/tutorial/200807/WRF%20Registry%20and%20Examples.pdf WRF Registry and Examples]
 +
* [http://www.mmm.ucar.edu/wrf/WG2/software_v2/ WRF v2 Software Tools and Documentation]
 +
* [http://www.mmm.ucar.edu/wrf/WG2/software_2.0/registry_schaffer.pdf Description of WRF Registry]
  
−
* <s>Walking line ignition (as the fireman walks igniting the fire)</s> done
+
[[Category:WRF-Fire|Development notes]]
−
* <s>Remove (by default) the warm perturbation (bubble) from atmospheric initializations in idealized cases</s> done
 
−
* <s>Modify the code and add namelist variables allowing for ingesting the cold/warm perturbation of a specified size (for people interested in fire propagation in downburst/convective environments)</s> done
 

Latest revision as of 05:51, 19 July 2017

Main article: WRF-SFIRE user guide. To get the software, see How to get WRF-Fire.

This page tracks activity in the WRF-Fire and related software development. All members of the community are welcome to get an account and edit.

Wish list

Add your suggestions or plans here. If you want to comment on any of the items, please start a new section of the talk page and link to it here.
  • Heat flux extinction depth dependent on fuel type and possibly times step
  • Interpolate by angle between different backing, flank, and forward spread rates.
  • Rework the propagation scheme so that the speed is computed only once per time step instead inside the right-hand-side in the Runge-Kutta method.
  • Add flux limiter option as in Rehm and McDermott 2009.
  • Flank spread rate as a function of base rate and TKE/turbulent fluxes
  • Turn off artificial diffusion for good
  • Implement full BURNUP algorithm instead of the simplification.
  • Keep standalone model working.
  • Add a canopy fire model for passive (colocated with surface fire) canopy fire.
  • Parametrize ignition startup. See discussion.
  • Input fuel moisture from the WRF surface model. See discussion.
  • Better level set method: High-order ENO and WENO, discontinuous Galerkin.
  • Rewrite the level set method so that the level set function is ignition time minus current time and get rid of the separate tign array.
  • Use the Fire SDK to compute ROS.
  • ROS model from Balbi et al 2009.
  • Force the fire to a given location from a file read on restart. This will require fire history replay and atmosphere spin-up.
  • Modify fuel from a file on restart to reflect suppression efforts.
  • Ignition & fire modification from MODIS fire detection.
  • Add fractional fuel volume to fuel categories and generate random fuel coverage.
  • Add other variables in the National Fire Danger Rating System as diagnostics to WRF output.

In progress

When you start on an item from the wish list, please move the item here and add a link to the branch where you work on it.
  • Clamp ignition point to the nearest cell center to avoid delay, see also WRF-Fire ignition
  • Fire cell-based fire propagation to get ignition time in lieu of a level-set function branch vk/mergge
  • Assimilation of station data into the fuel moisture model branch mv/moisture
  • Ignition from a given fire perimeter, with atmosphere and fuel consumption spin-up, by specifying ignition times. See discussion.
  • Real test problems with real fire data comparing fine and coarse resolutions.
  • Better quadrature for fuel left: The current scheme is second order accurate when all 4 corners of a fire mesh cell are on fire, and exact when all 4 corners are not on fire. In the case when only some of the 4 corners are on fire, the only requirements are that the transition when nodes ignite is continuous and monotonous. In that case, the scheme may not be very accurate. A better scheme would be accurate in more cases and have natural invariance properties. branch jm2/mkim last commit branch vk/test
This affects the amount of heat output from the cell in the timesteps when the fireline crosses the cell.

Done

Move the item here when done and add a link to the contributor's last commit before the merge into master. Links to major milestone events can be also added to the timeline.

2004

  • Ned Patton and Janice Coen propose WRF-Fire in a workshop paper and formulate the fundamental principles of how to combine WRF with the fire spread model from CAWFE.

2005

  • Standalone fire model from CAWFE rewritten in F90 by Ned Patton received Mar 31 2005

2006

  • John Michalakes writes specs for support of fire grids in WRF Feb 6 2006

2007

  • Alternative implementation of fire grid in nested domains in WRF by Jon Beezley Feb 29 2007
  • WRF-Fire development started from the WRF+CAWFE tracers code received from Ned Patton, Jon set up the git repository Jun 6 2007
  • Matlab prototype of level set method working Aug 30, 2007
  • Imported a modular rewrite with a new standalone level set code, called SFIRE Sep 5 2007
  • WRF+spread by level set coupled code working Nov 2 2007
  • Paper with description of WRF-Fire and data assimilation posted on arXiv Dec 24 2007
  • Ignition controlled from namelist Dec 24 2007

2008

2009

2010

2011

2012

2013

2014

2015

2016

Back burner

Items from the wish list that are around for a long time or may never be done should be moved here.
  • Merge additional changes made independently in the WRF 3.3 release.
  • Convert ignition namelist variables into arrays for multiple ignitions.
  • Add running (not colocated with surface fire) canopy fire.
  • Support WRF-NMM in addition to WRF-ARW
  • Take the winds from a given distance behind the fireline, and set the distance in the namelist.
  • Add fuel models & fuel modeling schemes, esp. Scott-Burgan categories. Input the same fuel description files as BehavePlus and FARSITE.
  • Generate input data for WFDS.

See also

External links

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