Double click the end of the line right on top of the existing river, so that HEC-RAS will recognize you want to create a junction.įirst HEC-RAS will ask you for the name of the new river/reach. You can see in the figure below a new river has been drawn from the upper right to the point on the original river where I want to split it. But to get HEC-RAS to insert a junction, you must draw a temporary tributary river. Now let’s say you want to do the reverse and split a single reach into two reaches.
![compute a stage hydrograph for a storage basin hec ras compute a stage hydrograph for a storage basin hec ras](https://image4.slideserve.com/9232440/file-and-options-menus-l.jpg)
River stations must always be in descending order from upstream to downstream. It is very important that your river stationing for the two reaches are consistent prior to doing this operation, or it will not work. You can change the name of the river and/or reach using the Edit…Change Name menu item. HEC-RAS will automatically take the name of the upstream of the two rivers for the new combined reach. You may need to close and reopen the HEC-RAS geometry schematic to make it look visually correct. Make sure to uncheck the option to Move Points/Objects and then select Edit…Delete…Junctions.ĭelete the temporary junction and you’re done. It doesn’t matter what you put in for a name, because you will be deleting the junction next. HEC-RAS will assume you want to put a junction here and will ask you what you want to name it. Now simply grab the end point of one river and drag it on top of the end point of the other and release the mouse button.
![compute a stage hydrograph for a storage basin hec ras compute a stage hydrograph for a storage basin hec ras](https://images.slideplayer.com/26/8406461/slides/slide_13.jpg)
It’s helpful to zoom in close so you can see the end point nodes and so that you don’t accidentally grab a cross section node. You’ll notice your cursor change to a pointer with an arrowed cross, and the vertices of the cross section and stream centerlines will highlight. In the figure above, they are disconnected-two separate rivers. I wish to combine the Upper Tualatin with the Clackamas reach of the Willamette River. Take the very simple reach presented below: There is no “combine two rivers” option in HEC-RAS, but it can be done using the Move Points/Objects option.
![compute a stage hydrograph for a storage basin hec ras compute a stage hydrograph for a storage basin hec ras](https://www.mdpi.com/water/water-13-02346/article_deploy/html/images/water-13-02346-g023.png)
Suppose you have two separate HEC-RAS rivers and wish to combine them. Written by Chris Goodell | September 17, 2015