tag:blogger.com,1999:blog-1675184707067447729.post4022211625337631673..comments2023-07-12T07:12:04.697-07:00Comments on The RAS Solution: Stability Issues with Storage AreasChris G.http://www.blogger.com/profile/00354834185663924786noreply@blogger.comBlogger5125tag:blogger.com,1999:blog-1675184707067447729.post-60345738929229146642019-05-09T14:33:13.881-07:002019-05-09T14:33:13.881-07:00Hi. I also get the extrapolation error, but I expe...Hi. I also get the extrapolation error, but I expected the water to go higher than the storage area. I was inputting small storage areas along either side of a river that would begin to fill once the water overtopped lateral weirs. My main question is, how do you set a maximum elevation or maximum storage volume? The small storage areas are not intended to attenuate the entire flood, but take smaller amounts of water off the river to a certain point. So in theory, it would accept water to a certain elevation and then bypass the weir and just flood the overbanks as it typically would. I am adding the lateral structures and storage areas in the 1D portion of a couple 1D/2D model. Spatially, the storage areas are within the 1D portion, but I could pull in the 2D portion if needed. However, I was trying to avoid it since this was supposed to be a pretty quick and simple test run. Kathleen E.https://www.blogger.com/profile/05816953662975822742noreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-8715415656622198232019-05-02T09:38:38.322-07:002019-05-02T09:38:38.322-07:00You have a storage area elevation volume curve tha...You have a storage area elevation volume curve that does not extend high enough. RAS is returning a water surface elevation that goes beyond your definition of that curve. In this case RAS extrapolates to get a result. Typically that is ok on an elevation-volume curve because it is usually fairly linear out there. But it is always good practice to extend the curve so it is higher than the highest computed water surface elevation. Chris G.https://www.blogger.com/profile/03272464763887890080noreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-7116101887003143252019-05-02T07:24:39.734-07:002019-05-02T07:24:39.734-07:00hi i am harsh
i am getting below error since long ...hi i am harsh<br />i am getting below error since long and didn't getting any solution <br />error! *** extrapolated beyond the Storage VOL vs Elevation Curve ****<br />sir please hepl me out what could be the problem for such error<br />harshhttps://www.blogger.com/profile/11608756097543542189noreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-41484074632678702742019-04-23T06:20:46.637-07:002019-04-23T06:20:46.637-07:00hi, im modeling a dam breach with the reservoir mo...hi, im modeling a dam breach with the reservoir modeled as a storage area. inside this storage area i have used to cross section as suggested in the module. i have also correctly connected my river reach with storage area. i have used a pilot flow and initial Rs station in combination as a boundary condition. additionally a lateral inflow to storage area and a normal depth are my bc in the unsteady editor. all my cross sections and the inline structure look good where my model is going unstable right away after simulation starts. i have tried it so many times yet i can't improve the model even a bit. what improvements shall i apply ?? <br /> Tesfahttps://www.blogger.com/profile/12037120464213265567noreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-61978079892447640932016-03-30T16:05:37.627-07:002016-03-30T16:05:37.627-07:00It is my understanding that storage areas are real...It is my understanding that storage areas are really only used to unsteady state flow analysis in order to capture the attenuation of flow over time. I noticed that if I used a storage area in a steady state analysis I still get attenuation, but I am not sure if it is erroneous or not? Any thoughts? <br />In other words, if a storage area is used in a steady state analysis, is this attenuation captured for the specified flow? or does it provide an erroneous flow attenuation?Anonymoushttps://www.blogger.com/profile/11748259593267010928noreply@blogger.com