which sort of time is influenced by time zone? https://dlt-acc.firelay.cloud/en/c/message_boards/find_thread?p_l_id=4041874&threadId=4393516 2026-05-12T16:52:38Z 2026-05-12T16:52:38Z Jing Zhao https://dlt-acc.firelay.cloud/en/c/message_boards/find_message?p_l_id=4041874&messageId=4393567 2017-07-03T15:50:00Z 2017-07-03T15:50:00Z

Dear Peng,<br /><br />Your solution is correct. <br /><br />Cheers,<br />Jing Zhao<br /><br />Deltares

Jing Zhao 2017-07-03T15:50:00Z peng yao https://dlt-acc.firelay.cloud/en/c/message_boards/find_message?p_l_id=4041874&messageId=4393561 2017-07-02T11:50:35Z 2017-07-02T11:48:05Z

Hi Jing, <br /><br />Thanks very much for the reply. <br />Then I know how the bc-file works. Another little question is how to set a time zone in bc-file?<br />I attached an example of bc-file which is generated by DelftShell:<br />...................................................................<br />[forcing]<br />Name = rivbnd_0001<br />Function = timeseries<br />Time-interpolation = linear<br />Quantity = time<br /><strong>Unit = seconds since 2016-11-01 00:00:00</strong><br />Quantity = dischargebnd<br />Unit = m³/s<br />723600 4920<br />727200 5000<br />730800 4520<br />734400 2060<br />738000 2520<br />741600 476<br />745200 -880<br />748800 -1380 <br />......................<br /><br />I didnot find a time zone setting here in the Unit row. Maybe I have to attach a string in Unit row manually, that is: Unit = seconds since 2016-11-01 00:00:00 <strong>+8:00:00</strong>, if I want to set &#34;2016-11-01 00:00:00&#34; to time zone 8. Am I right? Thanks!<br /><br />Peng

peng yao 2017-07-02T11:48:05Z Jing Zhao https://dlt-acc.firelay.cloud/en/c/message_boards/find_message?p_l_id=4041874&messageId=4393559 2017-06-30T17:13:53Z 2017-06-30T17:13:53Z

Dear Peng,<br /><br />First of all, your observation is correct that time zones in boundary conditions in DflowFM are treated differently from D3D.<br /><br />This can be the case when the boundary time series are provided in the BC-format. In that format, the time-variable has a unit that is expressed as a UDUNIT-string, from which the time zone of the data is extracted. The difference in time zone between data and model is also taken into account by DflowFM. Please check the time zone in BC-file, which works similar to the time zone in netcdf-files for meteo.<br /><br />Kind regards,<br />Jing Zhao<br /><br />Deltares

Jing Zhao 2017-06-30T17:13:53Z peng yao https://dlt-acc.firelay.cloud/en/c/message_boards/find_message?p_l_id=4041874&messageId=4393515 2017-06-28T03:43:46Z 2017-06-28T03:43:46Z

Hi there,<br /><br />Recently when I run a small model, I met an problem relating with time zone setting.<br /><br />To illustrate my problems, I&#39;m going to take a model with one river boundary upstream and one open sea boundary as an example. The time zone is set to 8.<br /><br />At river boundary, set the time-series discharge data starts from <strong>2016/11/09 17:00:00 </strong>and the model start time is<strong> 2016/11/10 00:00:00 </strong>( time zone 8). When run model, the errors occur. Diagnose file suggests EC-module errors and I found the error occurs when interpolating time-series boundary conditions to model time steps.<br /><br />Then we extend the discharge data one hour forward, say starting from <strong>2016/11/09 16:00:00 </strong>(just 8 hrs before model start time), the model can run without error. So, it seems that the time specified in time-series boundary conditions doesnot refer to the time zone 8, but the UTC. Is it true?<br /><br />To my experience from D3D, once the time zone specified in mdf, the times used in boundary conditions all refer to that. Only the metero data can have its own time zone. Obviously, DflowFM is not.<br /><br />So, it turns out to another similar question: in Dflow FM, which times are influenced by time zone and which are not? I have looked up the manual. unfortunately it is not clear on this.<br /><br />Thanks!<br /><br />Peng

peng yao 2017-06-28T03:43:46Z