Difference between revisions of "1D Open Channels"

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Open waterways (channels) are most commonly modelled as "S" type channels, the S signifies a sloping channel that can handle steep, super-critical flows. Open channels can either be modeled as an inertial or non-inertial channel, the latter removes the Courant stability condition and is useful for stabilizing very short S channels with high velocities.<br>
 
Open waterways (channels) are most commonly modelled as "S" type channels, the S signifies a sloping channel that can handle steep, super-critical flows. Open channels can either be modeled as an inertial or non-inertial channel, the latter removes the Courant stability condition and is useful for stabilizing very short S channels with high velocities.<br>
  
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'''Example of an open channel that could be modelled in 1D''' <br>
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'''Examples of open channels that could be modelled in 1D''' <br>
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[[File:Photo 04-12-2014 09 54 45.jpg|border|400px]]
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[[File:Photo 04-12-2014 09 54 45.jpg|thumb|none|400px|London, UK (pht: Rohan King)]]
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<br>
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[[File:Sundaycreek.jpg|thumb|none|400px|Sunday Creek, Australia]]
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<br>
  
 
=Basic Commands=
 
=Basic Commands=
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<font color="blue"><tt>Read GIS Table Links</tt></font> <font color="red"><tt>==</tt></font><tt>..\model\mi\1d_xs_xxxxx.MIF</tt>      ! corresponding cross-section polylines <br>
 
<font color="blue"><tt>Read GIS Table Links</tt></font> <font color="red"><tt>==</tt></font><tt>..\model\mi\1d_xs_xxxxx.MIF</tt>      ! corresponding cross-section polylines <br>
 
<br>
 
<br>
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The tutorial model [[Tutorial_Module04 | here]] runs through the necessary layers and setup for a 1D open channel within a model.
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The tutorial model [[Tutorial_M11 | here]] runs through the necessary layers and setup for a 1D open channel within a model.
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=Error trapping=
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*''under construction''
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==Circulations==
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==1D/2D boundary - alignment of cells==
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==1D/2D boundary - spill level==
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Ideally the location of the HX polyline, that represents the 1D/2D boundary, should be situated along the bank of the open channel. This is covered more in the <u>[https://docs.tuflow.com/classic-hpc/manual/latest/ TUFLOW Manual]</u>. In situations where the Digital terrain model does not properly define the bank elevation it can be necessary to include ZP points that are snapped to the HX lines that work in the same way as variable z line modifications. Details on how to set up this GIS layer can be found [[Tute_M04_MI_1D2D_Breaklines | here]].
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<font color="blue"><tt>Read GIS Z HX Line</tt></font> <font color="red"><tt>==</tt></font><tt>..\model\mi\2d_bc_xxxxx.MIF</tt>        ! Uses HX lines and ZP points from a 2d_bc layer <br>
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<br>
 
<br>
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<br>
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Any further questions please email TUFLOW support: [mailto:support@tuflow.com support@tuflow.com]
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=Typical check files used=
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The table below highlights some of the commonly used check files when reviewing 1D open channels. The full list of TUFLOW check files can be found [[TUFLOW_Check_Files | here]]. <br>
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{| align="left" class="wikitable" width="20%"
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! style="background-color:#005581; font-weight:bold; color:white;"| Filename prefix / suffix
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|-
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| [[Check_Files_1d_hydroprop | _hydroprop_check.mif<br>_hydroprop_check_L.shp]]
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|-
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| [[Check_Files_1d_inverts | _inverts_check.mif<br>_inverts_check_P.shp]]
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|-
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| [[Check_Files_1d_IWL | _iwl_check.mif<br>_iwl_check_P.shp]]
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|-
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| [[Check_Files_1d_nwk_C | _nwk_C_check.mif<br>_nwk_C_check_L.shp]]
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|-
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| [[Check_Files_1d_nwk_N | _nwk_N_check.mif<br>_nwk_N_check_P.shp]]
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|-
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| [[Check_Files_1d_WLLo | _WLLo_check.mif<br>_WLLo_check_L.shp<br>_xWLLo_check.mif<br>_xWLLo_check_L.shp]]
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|-
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| [[Check_Files_1d_WLLp | _WLLp_check.mif<br>_WLLp_check_P.shp<br>_xWLLp_check.mif<br>_xWLLp_check_P.shp]]
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|-
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| [[Check_Files_1d_xsl | _xsl_check.mif<br>_xsl_check_L.shp]]
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|-
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| [[Check_Files_1d_x1d_chans | _x1d_chans_check.mif<br>_x1d_chans_check_L.shp]]
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|-
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| [[Check_Files_1d_x1d_nodes | _x1d_nodes_check.mif<br>_x1d_nodes_check_P.shp]]
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|}
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<br><br><br><br><br><br><br><br>
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<br><br><br><br><br><br><br><br>
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<br><br><br><br>
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<br><br><br><br>
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Any further questions please email TUFLOW support: [mailto:support@tuflow.com?Subject=TUFLOW%201D%20open%20channels%20help support@tuflow.com]
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<br><br>
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{{Tips Navigation
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|uplink=[[ TUFLOW 1D Channels and Hydraulic Structures | Back to 1D Channels and Hydraulic Structures]]
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}}

Latest revision as of 10:06, 23 September 2024

Page Under Construction


Introduction

Open waterways (channels) are most commonly modelled as "S" type channels, the S signifies a sloping channel that can handle steep, super-critical flows. Open channels can either be modeled as an inertial or non-inertial channel, the latter removes the Courant stability condition and is useful for stabilizing very short S channels with high velocities.

Examples of open channels that could be modelled in 1D

London, UK (pht: Rohan King)


Sunday Creek, Australia


Basic Commands

Within the *.ecf the following commands and files are at a minimum required to a model an open channel:

Read GIS Network ==..\model\mi\1d_nwke_xxxxx.MIF ! network layer containing "S" channel alignments
Read GIS Table Links ==..\model\mi\1d_xs_xxxxx.MIF ! corresponding cross-section polylines

The tutorial model here runs through the necessary layers and setup for a 1D open channel within a model.

Error trapping

  • under construction

Circulations

1D/2D boundary - alignment of cells

1D/2D boundary - spill level

Ideally the location of the HX polyline, that represents the 1D/2D boundary, should be situated along the bank of the open channel. This is covered more in the TUFLOW Manual. In situations where the Digital terrain model does not properly define the bank elevation it can be necessary to include ZP points that are snapped to the HX lines that work in the same way as variable z line modifications. Details on how to set up this GIS layer can be found here.

Read GIS Z HX Line ==..\model\mi\2d_bc_xxxxx.MIF ! Uses HX lines and ZP points from a 2d_bc layer



Typical check files used

The table below highlights some of the commonly used check files when reviewing 1D open channels. The full list of TUFLOW check files can be found here.

Filename prefix / suffix
_hydroprop_check.mif
_hydroprop_check_L.shp
_inverts_check.mif
_inverts_check_P.shp
_iwl_check.mif
_iwl_check_P.shp
_nwk_C_check.mif
_nwk_C_check_L.shp
_nwk_N_check.mif
_nwk_N_check_P.shp
_WLLo_check.mif
_WLLo_check_L.shp
_xWLLo_check.mif
_xWLLo_check_L.shp
_WLLp_check.mif
_WLLp_check_P.shp
_xWLLp_check.mif
_xWLLp_check_P.shp
_xsl_check.mif
_xsl_check_L.shp
_x1d_chans_check.mif
_x1d_chans_check_L.shp
_x1d_nodes_check.mif
_x1d_nodes_check_P.shp

























Any further questions please email TUFLOW support: support@tuflow.com

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