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1D Integrity Tool - Tutorial: Difference between revisions

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The following exercises will take the user through the various tools using a pipe drainage network which contains a number of common errors which are found in these types of datasets.
 
==LoadingAccessing the Tutorial Data==
 
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1. Firstly download the tutorial dataset from the[https://downloads.tuflow.com/TUFLOW/Wiki_Tute_Models/Integrity_Tool_Tutorial.zip following linkhere] and unzip the dataset.<br>
2. From the '''Integrity_Tool_Tutorial\DatafolderData''' folder, load the '''1d_nwk_MI01_Pipes_001_L1d_nwk_MI01_Pits_001_L.shp''' , '''1d_nwk_MI01_Pipes_001_L.shp''' and '''dem_DEV_EG07.asc''' into QGIS.<br>
3. Review the dataset and use the [[QGIS TUFLOW Styles | ‘Apply TUFLOW Styles to open layers’]] tool, [[File:Check files open.png||30px]], to theme the data.<br>
[[File:Sub-surface drainage overview.png]]<br>
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[[File:integrity_tool_overview.PNG]]<br>
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*'''1. Input Network Lines''' - inputInput location of 1d_nwk lines such as pipes, culverts, and open channels. Use dropdown box and '+' button to add layers as inputs to tool.<br>
*'''2. Input Network Points''' - inputInput location of 1d_nwk points such as pits and nodes. Use dropdown box and '+' button to add layers as inputs to tool.<br>
*'''3. Input Tables''' - inputInput location of 1d_ta lines such as 1d_xs, 1d_cs, and 1d_hw. Use dropdown box and '+' button to add layers as inputs to tool.<br>
*'''4. Input DEM''' - inputInput raster. Currently only 1 input is supported, so if you are using tiled rasters datasets, they would need to be mosaiced into a single raster prior to running the tool.<br>
*'''5. Tool Selection''' - theThe active tab will determine the active tool. Prior to plugin version 3.2 a radio button was used to select the active tool. See <u>[[1D_Integrity_Tool#Tool_Documentation|Tool Documentation]]</u> for information on each tool.<br>
*'''6. Status Bar''' - containsContains the progress bar and status of the integrity tool. Includes information such as the current active task being performed (if one of the tools is running), and the status of the previously run tool.<br>
*'''7. Run''' - runsRuns the currently active tool (active tool determined by the current active tool tab - prior to plugin version 3.2 a radio button was used to select the active tool).<br>
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This meanswill mean we will be undertaking the integrity tests on this layer. We could also use the integrity tools on point layers and/or Cross-section/Height-Width tables, but for the purpose of this demonstration we will only use the network line layers.
 
=Using the 1D Integrity Tool=
 
The following pages go through the various checks available within the 1D Integrity Tools. These pages can be referred to individually, although if running through the tutorial they should be conducted in order.▼
 
▲The following pages go through the various checks available within the 1D Integrity Tools. TheseFor pagesthe canpurpose beof referredrunning tothrough individually,the althoughtutorial ifthese runningpages, throughand the tutorialsteps theywithin them, should be conductedundertaken in order.
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<li> <u>[[Integrity_Tool_-_Empty_Geometry_Check|Empty Geometry Check]]</u> --> This tool loops through the inputs file and identifies any features that have an empty or NULL geometry.
<li> <u>[[Integrity_Tool_-_Channel_ID|Channel ID Check]]</u> -->Checks the ID of each channel in the network and flag channels that have duplicate names or a NULL / empty ID.
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<li> <u>[[Integrity_Tool_-_Flow_Trace_Tool|Flow Trace Tool]]</u> -->The flow trace tool creates traces upstream from the selected channel, selecting all upstream network objects in the QGIS map window (network lines and network points).
<li> <u>[[Integrity_Tool_-_Continuity_Tool|Continuity Tool]]</u> -->The continuity 1D integrity tool will check all 1D inputs for downstream continuity based on the selected processing options. This is similar to the above Flow trace check but will undertake the assessment on the whole set of inputs rather than upstream of a selected link.
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=Summary=
The 1D integrity tool provides a set of checks and fixes to ensure that the 1D input data is suitable to be used within a TUFLOW hydraulic model. The checks assess common errors within 1D datasets which will either cause TUFLOW errors, or influence results. Commonly these common errors are a consequence of digitisation and given the nature of large urban drainage networks are difficult to spot visually. The automated, 1D integrity tools provide a quick and easy approach to allow the modeller to be proactive in identifying problematic parts of a 1D system prior to loading into TUFLOW.
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