1D Integrity Tool - Tutorial: Difference between revisions
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This means 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.
<ol>
<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.
</ol>
=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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