FeatureBuilt · in the lab
Air dispersion
Stacks to plumes on the site plan.
Use this add-on:
Screenshots and a short video come with the listing (AL.3).
Overview
Planned. This add-on is not built and no host app mounts it. Air dispersion is planned (roadmap row CH.19) as stacks taken from the plant model, with plumes drawn on the CivilCraft site plan. The first step is a spike on running AERMOD, the US regulatory model. A stability-class screening library exists in the lab and says plainly that it is not AERMOD; no app uses it yet.
Who it’s for
- Environmental engineers screening emissions.
- Site planners who want plumes on the site plan.
What you can do
- Nothing works yet. Planned: a stack taken from a process stream, plume rise, screening over stability class and wind speed, hourly runs at receptors from weather data, contours on the site plan, and a check against limits you enter (CH.19).
Methods and standards
Planned from EPA-published methods; the library uses a Gaussian plume with Briggs sigmas and plume rise. The AERMOD spike was recorded as not built: the source is not in the repository, there is no Fortran compiler, and the usual compiler is GPL. Three routes were listed and none chosen.
Data and sources
Weather data and the limits to compare with are your inputs. Nothing real is bundled except a made-up test pack for the limits.
Verification
Planned: no add-on test yet. The engine library behind it has a test, tools/process-test/test-env.mjs, which the session log chem-env_PART_3 records as 206 passed, 0 failed on 2026-10-28. It includes Turner's maximum concentration formula within 4 percent. The log lists the Briggs sigmas, plume-rise constants and Pasquill table as typed and not confirmed.
Limits
Not built: AERMOD itself, building downwash, terrain, deposition, chemistry, area, volume and line sources, fumigation, and the CivilCraft site-plan command. Screening results are not permit-grade.
Files and formats
Planned: contours on the site plan layers. Nothing is written today.
Get started
- Nothing to open yet. The add-on is planned and cannot be added.
- Watch the roadmap row named in this listing for when it is built and enters the lab.
Languages
No languages are listed for this add-on yet. Its maker may add some.
Works in
| Edition | Works | Note |
|---|---|---|
| Browser (/use) (yours) | Added on demand | Fetched the first time you use it, then kept for offline use. |
| Studio from getcadcraft.com | Added on demand | Fetched the first time you use it, then kept for offline use. |
| Microsoft Store | Added on demand | Fetched the first time you use it, then kept for offline use. |
| Google Play | Added on demand | Fetched the first time you use it, then kept for offline use. |
| iPad and iPhone (App Store) | Included; switch it on | Part of the reviewed app; your list switches it on. |
| Custom build | Added on demand | Fetched the first time you use it, then kept for offline use. |
Comes with
- Process engine 2.5 MB
Adding it brings these too. Engines are shared: each downloads once for every add-on that uses it.
Needed by: Environmental engineering (air, soil remediation, permitting).
Versions
| Version | Channel | Date | What changed |
|---|---|---|---|
| 1.0.0 | lab | October 31, 2026 | First version in the Library. |
Licence and maker
CadCraft (CadCraft, first-party). Licence: Apache-2.0. Dependencies carry their own licences, listed on their pages.