ISIS Quick Start Guide - Halcrow

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ISISQuick Start GuideFigure 20. The Stage-Time data entry form for the downstream boundary condition S8.11. Visualise the river model. After building the single channel, we can use Visualiser to visualise thechannel that we have just been build. This is done by clicking on the Visualiser picture icon or select> Tools > Visualiser from the main menu.Note: Please remember to save your file. For the information on how to run a simulation and view theresults please refer to other sections of this quick start guide.Do you have any questions or remarks? Please contact ISIS support at isis@halcrow.comor on 0845 094 7994 (+44 1793 845733 from outside the UK) www.halcrow.com/isis14
ISISQuick Start Guide4. How to Build a Simple NetworkThis Chapter describes the way of building a model of a branched river (i.e. a river network). Theexample river network consists of a main channel and tributary channel (Figure 21).S4UpJunctionS4DnT4Figure 21. A schematic representation of a simple network.For the main channel, S1, S2…S8 are the labels for its cross-sections. T1, T2, T3 and T4 are thelabels for the tributary channel.As shown in Figure 21, a junction should be built to link the main channel and the tributary at sectionS4. In order to insert a junction at section 4, we have to split section S4 into two sections: S4Up andS4Dn. Then we should place the junction in between S4Up and S4Dn. Please note that we specify thefield “distance to next section” for S4up section as 0, which physically means S4Up and S4Dn are thesame section.The detailed procedures of building a simple network are described below:1. Start ISIS and begin a new model.2. Build the upstream boundary condition unit (by clicking on one of the icons of the Boundaries Toolbar eg QTBDY boundary icon ). It should be built in the same manner as described in Chapter 3.Here we will name this QT boundary as S1. Save the file with the name simpleNet.DAT.3. Specify the hydrograph for the upstream boundary condition unit. Double click on the QTBDY unitin the Network Properties window in ISIS. Enter the time series in the QTBDY boundary table thatopens, for example, take the same hydrograph as described in the Step 2 of Chapter 3.Figure 22. Flow-Time boundary data entry form for the upstream boundary conditionDo you have any questions or remarks? Please contact ISIS support at isis@halcrow.comor on 0845 094 7994 (+44 1793 845733 from outside the UK) www.halcrow.com/isis15
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ISIS Quick Start Guide - Halcrow

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