vegetation module for a partially vegetated channel https://dlt-acc.firelay.cloud/c/message_boards/find_thread?p_l_id=3231581&threadId=3391937 2026-05-15T14:23:32Z 2026-05-15T14:23:32Z shabnam mirheidarian https://dlt-acc.firelay.cloud/c/message_boards/find_message?p_l_id=3231581&messageId=3391947 2019-07-29T06:25:17Z 2019-07-29T06:25:17Z

hi, I wanted to model a vegetation patch with diameter 10 cm in a flume with 1 m width, I have the same problem and <p style="text-align: left"><span style="color: #212529"><span style="font-family: -apple-system,BlinkMacSystemFont,&quot;Segoe UI&quot;,Roboto,&quot;Helvetica Neue&quot;,Arial,sans-serif,&quot;Apple Color Emoji&quot;,&quot;Segoe UI Emoji&quot;,&quot;Segoe UI Symbol&quot;"><span style="font-size: 14px;">The flow velocity in the vegetated area is quite similar as the flow velocity at the open channel (non-vegetated area), I wanted to know could you find the problem or not?</span></span></span></p>

shabnam mirheidarian 2019-07-29T06:25:17Z Xiaochen Chen https://dlt-acc.firelay.cloud/c/message_boards/find_message?p_l_id=3231581&messageId=3391936 2016-11-02T04:50:59Z 2016-11-02T04:50:59Z

Hi there,<br />I am currently trying to model a channel with vegetation with Delft3D: the vegetation width is 2/3 of the channel width. The model itself runs smoothly however the model result seems no as good as I expected. The flow velocity in the vegetated area is quite similar as the flow velocity at the open channel (non-vegetated area), and velocity difference is only 0.5 cm/s. However, from the experimental data there is larger velocity difference between the vegetated flow and open channel flow, around 10 cm/s. It seems that the vegetation do not have a &#39;blocking effect&#39; to slow down the flow in the Delft3D model. Can anyone help me with this problem? I attached my vegetation input file with this post also.<br /><br />By the way I also try to model the channel fully covered with vegetation, but the result is quite good and quite similar with the measurements. Thanks!<br /><br /><br />Xiaohchen

Xiaochen Chen 2016-11-02T04:50:59Z