# Latest **URL:** https://community.suews.io/latest.md [Latest](https://community.suews.io/latest.md) · [Categories](https://community.suews.io/categories.md) · [Tags](https://community.suews.io/tags.md) --- ## [Welcome to the SUEWS community!](https://community.suews.io/t/welcome-to-the-suews-community/5)
**Author:** [@system](https://community.suews.io/u/system)\ **Replies:** 0\ **Last updated:** [2 December 2025 13:24 UTC](https://community.suews.io/t/welcome-to-the-suews-community/5 "2025-12-02T13:24:09Z")
Hello and welcome to the SUEWS community! This is a friendly place for anyone working with SUEWS (Surface Urban Energy and Water balance Scheme) — whether you’re asking questions, sharing workflows, reporting issues, or… --- ## [Water balance analysis in turorial05](https://community.suews.io/t/water-balance-analysis-in-turorial05/161)
**Author:** [@LeaGu](https://community.suews.io/u/LeaGu)\ **Replies:** 2\ **Last updated:** [21 September 2026 07:04 UTC](https://community.suews.io/t/water-balance-analysis-in-turorial05/161 "2026-09-21T07:04:11Z")
Hi all, I am getting started with SEUWS and water balance would be my focus. As I went through the tutorial, I noticed that the indicated annual water balance in the tutorial05.ipynb ( P + I = E + R + D + dS) is not tr… --- ## [Air temperature incomparable across MOST and RSL simulations](https://community.suews.io/t/air-temperature-incomparable-across-most-and-rsl-simulations/157)
**Author:** [@Harro](https://community.suews.io/u/Harro)\ **Replies:** 1\ **Last updated:** [2 September 2026 10:42 UTC](https://community.suews.io/t/air-temperature-incomparable-across-most-and-rsl-simulations/157 "2026-09-02T10:42:35Z")
Hi, I have a question regarding the vertical interpolation towards 2-m temperature. Some of this question was touched upon in this topic: How to best model within canyon air temperature . However, the specific use case … --- ## [SUEWS Tutorial: Irrigation, Green Spaces & Thermal Comfort](https://community.suews.io/t/suews-tutorial-irrigation-green-spaces-thermal-comfort/156)
**Author:** [@Dreywen](https://community.suews.io/u/Dreywen)\ **Replies:** 2\ **Last updated:** [2 September 2026 10:28 UTC](https://community.suews.io/t/suews-tutorial-irrigation-green-spaces-thermal-comfort/156 "2026-09-02T10:28:34Z")
Hi everyone, The idea here is to develop a tutorial on how to use the SUEWS plugin to integrate irrigation of different types of green spaces into an urban project. Main objective The main aim of this tutorial is to pr… --- ## [Counter-intuitive T2 response to tree density under RSL method](https://community.suews.io/t/counter-intuitive-t2-response-to-tree-density-under-rsl-method/155)
**Author:** [@HXban](https://community.suews.io/u/HXban)\ **Replies:** 2\ **Last updated:** [2 September 2026 10:24 UTC](https://community.suews.io/t/counter-intuitive-t2-response-to-tree-density-under-rsl-method/155 "2026-09-02T10:24:39Z")
Hello, I’m running a tree density sensitivity analysis with rslmethod=1 and observing that 2m air temperature increases with tree density, which is physically counter-intuitive. Under rslmethod=0 (MOST), the trend for te… --- ## [Initial albedo values](https://community.suews.io/t/initial-albedo-values/153)
**Author:** [@Janka](https://community.suews.io/u/Janka)\ **Replies:** 1\ **Last updated:** [20 August 2026 21:11 UTC](https://community.suews.io/t/initial-albedo-values/153 "2026-08-20T21:11:54Z")
Hi, yet another question - or rather flagging a potential issue with albedo values in SUEWS 2026.5 vs UMEP’s Database Prepare. In its reference table we have: Helsinki deciduous trees: alb\_min = alb\_max = 0.16 (ref ID … --- ## [How to implement chunk\_day in new syntax](https://community.suews.io/t/how-to-implement-chunk-day-in-new-syntax/40)
**Author:** [@biglimp](https://community.suews.io/u/biglimp)\ **Replies:** 10\ **Last updated:** [20 August 2026 09:14 UTC](https://community.suews.io/t/how-to-implement-chunk-day-in-new-syntax/40 "2026-08-20T09:14:11Z")
How do I implement the old switch chunk\_day using the new type of syntax sim.run()? We use it since we sometime have memory issues in Windows env., or maybe this is not needed anymore? --- ## [Troubleshooting manual irrigation setup in Urban Energy Balance](https://community.suews.io/t/troubleshooting-manual-irrigation-setup-in-urban-energy-balance/146)
**Author:** [@Dreywen](https://community.suews.io/u/Dreywen)\ **Replies:** 4\ **Last updated:** [4 August 2026 11:36 UTC](https://community.suews.io/t/troubleshooting-manual-irrigation-setup-in-urban-energy-balance/146 "2026-08-04T11:36:12Z")
Hello ! I’m currently trying to build a prototype project for a new urban district, focusing on vegetation and irrigation strategies. My final goal is to run SUEWS to obtain T2m and RH2 that I can, later, use in SOLWEIG… --- ## [SUEWS v2026.1.28rc1 crash in UMEP when saving results (TypeError with a dictionary instead of a string)](https://community.suews.io/t/suews-v2026-1-28rc1-crash-in-umep-when-saving-results-typeerror-with-a-dictionary-instead-of-a-string/140)
**Author:** [@Adhaile](https://community.suews.io/u/Adhaile)\ **Replies:** 7\ **Last updated:** [15 July 2026 08:43 UTC](https://community.suews.io/t/suews-v2026-1-28rc1-crash-in-umep-when-saving-results-typeerror-with-a-dictionary-instead-of-a-string/140 "2026-07-15T08:43:55Z")
I’m running the “Urban Energy Balance: SUEWS” processing algorithm in UMEP (QGIS plugin), using SUEWS v2026.1.28rc1 with SuPy 2026.4.3rc1, on QGIS 3.40.11-Bratislava, Windows. The simulation itself runs correctly all the… --- ## [SUEWS Community Hackathon 2026: how we judged, and the winners](https://community.suews.io/t/suews-community-hackathon-2026-how-we-judged-and-the-winners/141)
**Author:** [@sunt05](https://community.suews.io/u/sunt05)\ **Replies:** 0\ **Last updated:** [9 July 2026 16:49 UTC](https://community.suews.io/t/suews-community-hackathon-2026-how-we-judged-and-the-winners/141 "2026-07-09T16:49:49Z")
Thanks for joining us at our first SUEWS Community Hackathon at UCL East two weeks ago. We have finished judging, and are delighted to share the results. First, how the entries were judged. Every team analysed the same … --- ## [Paved surface irragation](https://community.suews.io/t/paved-surface-irragation/138)
**Author:** [@huoshuhao](https://community.suews.io/u/huoshuhao)\ **Replies:** 2\ **Last updated:** [5 July 2026 09:43 UTC](https://community.suews.io/t/paved-surface-irragation/138 "2026-07-05T09:43:02Z")
Hi, I have a question regarding simulating irrigation or street cleaning on paved surfaces in SUEWS. I would like to prescribe a paved-surface watering rate of 0.5 mm h⁻¹. My current setup is: WaterUseMethod = 1, so e… --- ## [Question about FAIBldg and wind response at 1 km grid resolution](https://community.suews.io/t/question-about-faibldg-and-wind-response-at-1-km-grid-resolution/131)
**Author:** [@HXban](https://community.suews.io/u/HXban)\ **Replies:** 3\ **Last updated:** [1 July 2026 07:00 UTC](https://community.suews.io/t/question-about-faibldg-and-wind-response-at-1-km-grid-resolution/131 "2026-07-01T07:00:15Z")
I have a question regarding the internal calculation of FAIBldg when using SUEWS on 1 km × 1 km grids. I am using SUEWS on 1 km × 1 km grids. When using the default configuration (FAIMethod = 1), I noticed that the int… --- ## [Pydantic tests makes model un-user-friendly. No solution offered](https://community.suews.io/t/pydantic-tests-makes-model-un-user-friendly-no-solution-offered/128)
**Author:** [@biglimp](https://community.suews.io/u/biglimp)\ **Replies:** 6\ **Last updated:** [26 June 2026 14:53 UTC](https://community.suews.io/t/pydantic-tests-makes-model-un-user-friendly-no-solution-offered/128 "2026-06-26T14:53:45Z")
We have discussed this issue many times but I will bring this up again as this might also happen other users. (Maybe this also should be posted in the UMEP Discussions forum as we might reach a wider audience there). We… --- ## [The SUEWS Community Hackathon entries are live — come help judge them](https://community.suews.io/t/the-suews-community-hackathon-entries-are-live-come-help-judge-them/127)
**Author:** [@sunt05](https://community.suews.io/u/sunt05)\ **Replies:** 0\ **Last updated:** [25 June 2026 17:21 UTC](https://community.suews.io/t/the-suews-community-hackathon-entries-are-live-come-help-judge-them/127 "2026-06-25T17:21:14Z")
The first SUEWS Community Hackathon is in, and the entries are now public — with an open invitation to help judge them. Over a single afternoon during the 16th UCL RDR Annual Conference, a room of researchers, students … --- ## [Transcript link - Marina Fitzner](https://community.suews.io/t/transcript-link-marina-fitzner/125)
**Author:** [@MaFitz11](https://community.suews.io/u/MaFitz11)\ **Replies:** 0\ **Last updated:** [24 June 2026 16:03 UTC](https://community.suews.io/t/transcript-link-marina-fitzner/125 "2026-06-24T16:03:10Z")
--- ## [Submission - Marina Fitzner: Targeted Cooling for a Hotter City](https://community.suews.io/t/submission-marina-fitzner-targeted-cooling-for-a-hotter-city/120)
**Author:** [@MaFitz11](https://community.suews.io/u/MaFitz11)\ **Replies:** 0\ **Last updated:** [24 June 2026 15:49 UTC](https://community.suews.io/t/submission-marina-fitzner-targeted-cooling-for-a-hotter-city/120 "2026-06-24T15:49:56Z")
Targeted Cooling for a Hotter UDA-city --- ## [My SUEWS-agent 1 Trial Run: An Outsider's Perspective](https://community.suews.io/t/my-suews-agent-1-trial-run-an-outsiders-perspective/114)
**Author:** [@farrahdingal](https://community.suews.io/u/farrahdingal)\ **Replies:** 1\ **Last updated:** [24 June 2026 15:46 UTC](https://community.suews.io/t/my-suews-agent-1-trial-run-an-outsiders-perspective/114 "2026-06-24T15:46:31Z")
It’s been incredibly hot here in Cambridge. It inspired me to sit down and think a little bit more about how we can prepare to live through hotter and hotter summers. Inspired by Professor @sunt05 post, I decided to also… --- ## [My AI Experience with the SUEWS-agent 1: From plain English to a climate simulation](https://community.suews.io/t/my-ai-experience-with-the-suews-agent-1-from-plain-english-to-a-climate-simulation/107)
**Author:** [@sunt05](https://community.suews.io/u/sunt05)\ **Replies:** 4\ **Last updated:** [23 June 2026 10:59 UTC](https://community.suews.io/t/my-ai-experience-with-the-suews-agent-1-from-plain-english-to-a-climate-simulation/107 "2026-06-23T10:59:28Z")
On 24 June 2026 we are running the first SUEWS Community Hackathon at UCL East, where a room of people will drive an urban climate model entirely in plain language, working with an AI agent, no coding required. As a war… --- ## [My AI Experience with the SUEWS-agent 4: From running a simulation to asking a bolder question](https://community.suews.io/t/my-ai-experience-with-the-suews-agent-4-from-running-a-simulation-to-asking-a-bolder-question/110)
**Author:** [@sunt05](https://community.suews.io/u/sunt05)\ **Replies:** 0\ **Last updated:** [18 June 2026 13:39 UTC](https://community.suews.io/t/my-ai-experience-with-the-suews-agent-4-from-running-a-simulation-to-asking-a-bolder-question/110 "2026-06-18T13:39:30Z")
The simplest way to use an AI agent is to do the same work faster. The more interesting way is to explore what was out of reach without one. For SUEWS, I think of it as a simulation-to-research ladder, where each rung as… --- ## [My AI Experience with the SUEWS-agent 3: Why and how we built the SUEWS-agent](https://community.suews.io/t/my-ai-experience-with-the-suews-agent-3-why-and-how-we-built-the-suews-agent/109)
**Author:** [@sunt05](https://community.suews.io/u/sunt05)\ **Replies:** 0\ **Last updated:** [18 June 2026 13:38 UTC](https://community.suews.io/t/my-ai-experience-with-the-suews-agent-3-why-and-how-we-built-the-suews-agent/109 "2026-06-18T13:38:58Z")
SUEWS is the urban climate model I help develop. It simulates how cities exchange heat and water with the atmosphere, and researchers around the world use it for questions ranging from neighbourhood-scale heat to city-s… --- ## [My AI Experience with the SUEWS-agent 2: What an AI agent actually is](https://community.suews.io/t/my-ai-experience-with-the-suews-agent-2-what-an-ai-agent-actually-is/108)
**Author:** [@sunt05](https://community.suews.io/u/sunt05)\ **Replies:** 0\ **Last updated:** [18 June 2026 13:38 UTC](https://community.suews.io/t/my-ai-experience-with-the-suews-agent-2-what-an-ai-agent-actually-is/108 "2026-06-18T13:38:31Z")
In the first post I showed a SUEWS-agent session end to end: I typed a plain-English request, and the agent built a configuration, checked it, ran the model, drew a figure, and left me to judge whether the result made se… --- ## [SUEWS Community Hackathon — Re-imagining Cities of the Future, 24 June, UCL East](https://community.suews.io/t/suews-community-hackathon-re-imagining-cities-of-the-future-24-june-ucl-east/61)
**Author:** [@sunt05](https://community.suews.io/u/sunt05)\ **Replies:** 2\ **Last updated:** [9 June 2026 12:05 UTC](https://community.suews.io/t/suews-community-hackathon-re-imagining-cities-of-the-future-24-june-ucl-east/61 "2026-06-09T12:05:59Z")
We’re holding the first SUEWS Community Hackathon, supported by our SUEWS-Next project. We’ve built it around the same question, and the same day, as this year’s UCL RDR 16th Annual Conference: “Cities of the Future: Ris… --- ## [SUEWS v2026.6.5: a cleaner configuration schema + suews-agent](https://community.suews.io/t/suews-v2026-6-5-a-cleaner-configuration-schema-suews-agent/96)
**Author:** [@sunt05](https://community.suews.io/u/sunt05)\ **Replies:** 0\ **Last updated:** [8 June 2026 11:28 UTC](https://community.suews.io/t/suews-v2026-6-5-a-cleaner-configuration-schema-suews-agent/96 "2026-06-08T11:28:33Z")
SUEWS 2026.6.5 is out. The headline is that we’ve updated the YAML configuration schema to 2026.5. This is the latest step in a long tidy-up of the configuration surface: field names are now consistent snake\_case, the ph… --- ## [SUEWS Community Hackathon, 24 June at UCL East](https://community.suews.io/t/suews-community-hackathon-24-june-at-ucl-east/65)
**Author:** [@sunt05](https://community.suews.io/u/sunt05)\ **Replies:** 0\ **Last updated:** [28 May 2026 13:56 UTC](https://community.suews.io/t/suews-community-hackathon-24-june-at-ucl-east/65 "2026-05-28T13:56:45Z")
Sign-ups close 23:59 BST, Sunday 31 May. Our first SUEWS Community Hackathon runs on 24 June at UCL East: re-imagine the cities of the future, hands-on, with the new SUEWS AI assistant. Read the full announcement and app… --- ## [Question on seasonal LAI varibility and use of observed LAI in SUEWS](https://community.suews.io/t/question-on-seasonal-lai-varibility-and-use-of-observed-lai-in-suews/45)
**Author:** [@Divya](https://community.suews.io/u/Divya)\ **Replies:** 12\ **Last updated:** [20 April 2026 12:03 UTC](https://community.suews.io/t/question-on-seasonal-lai-varibility-and-use-of-observed-lai-in-suews/45 "2026-04-20T12:03:16Z")
Hello Team, In my simulation, the LAI for grass, evergreen trees and deciduous trees remains constant throughout the year, while MERRA2 shows strong seasonal variability. I have attached the LAI plot and LAI parameter f… --- ## [Question on SUEWS temperature simulation sensitivity to vegetation parameters](https://community.suews.io/t/question-on-suews-temperature-simulation-sensitivity-to-vegetation-parameters/57)
**Author:** [@CynthiaGuo](https://community.suews.io/u/CynthiaGuo)\ **Replies:** 4\ **Last updated:** [16 April 2026 12:52 UTC](https://community.suews.io/t/question-on-suews-temperature-simulation-sensitivity-to-vegetation-parameters/57 "2026-04-16T12:52:14Z")
Thanks for adding me to the forum！ I am currently establishing an impact study to investigate the influence of vegetation-related parameters on the outputs of SUEWS. At present, I am modifying parameters related to surf… --- ## [Running SUEWS on large grids: strategies for city-scale simulations](https://community.suews.io/t/running-suews-on-large-grids-strategies-for-city-scale-simulations/55)
**Author:** [@sunt05](https://community.suews.io/u/sunt05)\ **Replies:** 0\ **Last updated:** [31 March 2026 13:07 UTC](https://community.suews.io/t/running-suews-on-large-grids-strategies-for-city-scale-simulations/55 "2026-03-31T13:07:31Z")
If you’re running SUEWS on grids with hundreds or thousands of cells — say, a city at 100 m resolution — you may hit memory limits when the entire domain is loaded at once. This post covers how to handle this efficiently… --- ## [Impact studies with gridded input data](https://community.suews.io/t/impact-studies-with-gridded-input-data/50)
**Author:** [@Janka](https://community.suews.io/u/Janka)\ **Replies:** 3\ **Last updated:** [24 March 2026 19:41 UTC](https://community.suews.io/t/impact-studies-with-gridded-input-data/50 "2026-03-24T19:41:03Z")
Hi, In the tutorial on impact studies (3.4), the data frame is modified to create a grid structure where each grid is assigned a different parameter level. This allows running all scenarios at once and comparing/plottin… --- ## [Question on UTC offset in SUEWS prepare and forcing data in local time](https://community.suews.io/t/question-on-utc-offset-in-suews-prepare-and-forcing-data-in-local-time/44)
**Author:** [@Divya](https://community.suews.io/u/Divya)\ **Replies:** 2\ **Last updated:** [10 February 2026 15:48 UTC](https://community.suews.io/t/question-on-utc-offset-in-suews-prepare-and-forcing-data-in-local-time/44 "2026-02-10T15:48:26Z")
I have a query regarding the handling of forcing time and the UTC offset setting in SUEWS Prepare. Following the SUEWS documentation on forcing data requirements ( 4.2. Meteorological Forcing Data — SUEWS 2026.1.28 docu… --- ## [Question on SUEWS sensitivity to vegetation parameters](https://community.suews.io/t/question-on-suews-sensitivity-to-vegetation-parameters/31)
**Author:** [@Janka](https://community.suews.io/u/Janka)\ **Replies:** 14\ **Last updated:** [5 February 2026 12:58 UTC](https://community.suews.io/t/question-on-suews-sensitivity-to-vegetation-parameters/31 "2026-02-05T12:58:18Z")
Hi! Thanks for adding me to the forum :slight\_smile: I’m setting up an impact study (following the SUEWS Tutorial 3.1.3) to investigate the effects of various vegetation-related parameters on SUEWS output. So far, I’ve … [Next page](https://community.suews.io/latest.md?page=1)