Introduction to Storm and Sanitary Analysis

hi everyone thanks for joining us for today's webinar introduction to storm and sanitary analysis our presenter today is Tom Owen from CTC before I send it over to Tom I want to remind you you are all on mute and if you have any questions please put them in the question queue and we will get to them at the end of the presentation we are also recording this presentation the video will be posted to our YouTube page in the next couple of days so without further ado I'll hand it over to Tom ok thanks Ben well everybody has been said we're going to be doing an introduction to storm and sanitary analysis today my name is Tom Wan I'm an EIT and application engineer with CAD Technology Center I've been here handful of months so fairly new to CAD Technology Center prior to being here I did work with Bolton and mank did some stuff with a agricultural drainage and municipal work you know so let's let's get started with things here just a fair warning I'm going to try to get this all fit into the next half hour we may go a couple minutes over but I'll do what I can to keep things moving along for us and any questions you do put in the chat window will be archived and I'll be able to address those and get answers out following the presentation okay so intro to storm and sanitary analysis ssa hopefully what we want to do here is show you guys kind of how to get around in the interface we'll look at what's on the toolbars what's on the data tree we're definitely going to get into how to set up your hydrology to get your runoff do your routing and hydraulics and show you all a lot of the versatility and the power that's involved in the application with all the methods that you do have available to you big part of SSA is as the title implies it's analysis we can run do some design modifications you can do a design from scratch but there's a lot of ways to and look at your analysis generate reports at any stage or an overall report both the physical properties and analysis results and to look at those in several ways that we're going to see here once we get into the application sort of the way that we're gonna frame this is we're gonna do a workflow where we started in civil 3d which may be a useful workflow and show how we can export out our pipe Network data and also our catchment data we're going to show how to make catchments if you're not familiar with that in in civil 3d push that out to SSA where we can run our analysis fill out some more of the more robust hydrology inputs within SSA and then export back and push our updates to civil 3d so the problem or why do we want to use SSA now well as I said it could be useful to start your preliminary design you're doing your alignments you're doing your site work in civil 3d you get your pipe network set up and now we need to do some analysis and what better way to run the analysis then to use the actual preliminary design the actual pipe network you've started with and let's push that out to SSA and come back with any updates to civil 3d it can be a very handy workflow that way and as I was point alluding to before SSA has a very robust input parameter options so there's several Hydra hydrology methods for runoff there's several routing methods and hydraulic methods for pipe flow and even pressurized flows will see as may be dictated by per project so couple steps just outlining what we're going to get into we're gonna have our basic pipe network setup I'm going to show you how to make a catchment in civil 3d and also with a simple surface made from grading tools to model a little pond we've got I'm going to show you how to generate a staged storage volume report and how to use that in SSA in the model as a storage node then we're going to go in NASA sa will import that civil3d data the pipe Network and catchment data that's going to fill out our all the information along with it in SSA we'll go in and we'll set some of the hydrology parameters and inputs and we'll run an analysis I'll show you where we can generate your reports along the way push those quickly out to excel out to different formats you can use in a word doc or PDF as well and we're going to use within the civil3d to SSA workflow we're actually going to use what's called States in SSA to save states of our design process and I'm going to show you how that works once we get into the SSA there's a little bit of a trick workflow that we're going to use to push updates back to civil 3d okay so let's let's get into the application I'm going to open up my civil 3d drawing here I've just got in the background I've got an image X roughed in okay I've got a couple runs of pipe some catch basins along here and this is a pond surface that we've got we're going to use to generate the staged storage volume so let's go ahead and make a catchment so that we can use some of the site that we've got built in SSA and push that out with our pipe Network or that we've got built in civil3d rather and push that out with our pipe network to SSA so there's a couple of ways to do this the first step is either way is going to be to create a catchment group and you can build a catchment based on the slopes on your surface in civil 3d but that can be kind of buggy and you can end up with some strange shaped slopes so the recommended workflow that we like to point to is let's just create create our catchment boundary with P lines or polylines and then also create the flow line or the flow path with the polyline and we could point to that with the create catchment tool so I'm just going to make one for this the sketch phase in here really simple and let's put in a flow path maybe it's running close to the edge here just a couple of polylines and here you can create from surface Creek from object is what we're going to use we're prompted to select the boundary for our catchment and to select the upstream end of the polyline okay so we get our wizard popped up one important step here is that we want to reference a pipe network and reference structure that way the catchment is going to get pulled along with the pipe network out to SSA so we'll go out this will send us back in a model space here and now I'm going to grab my structure my Inlet and right now I'll switch over to the flow path time of concentration civil3d can use TR 55 to do time a concentration or user-defined so you're fairly limited there but we'll see how we can fill some of that out and then expand on it in SSA I am going to assign a slope based on the surface I've got laying underneath this flow path that I've drawn so I'll do from surface and I've got a composite surface in there and there we go it's built out for us we can grab that go in and edit flow segments and right now you can see that for the entire length along that polyline it's given us shallow concentrated flow we can add a channel flow and sheet flow if we like just hit our little plus and it's asking okay where do you want to cut off the next flow segment let's go somewhere around 104 a sheet flow and you can see that the lengths updated for the shallow concentrated flow as well there's a default - two-year 24-hour rainfall maybe that's a little lower and always go in and change things you can also see slope pulled from the surface I'll give this a roughness 0.3 and you can see my time of concentration is generated over here so that's all there is to creating a catchment I'm gonna do a little bit of pre-baked magic here and open up drawing that's got the catchments built out and so I've got two others in here and we can always go into catchment properties and see how that's all built so this has some sheep flow in it so I'm shall concentrated flow and channel flow and it's all all a summation of all three flow types is listed right here along with a reminder of the method used for time and concentration okay so let's look at our our pond over here that we're going to outlet into so this is built with grading tools that are grading out to the existing surface from a feature line and you can see that some of the contours are not exactly perfect they're not complete contours and the stage storage tool that we're going to use to get a staged storage volume to be used in SSA needs to have neat and tidy contours so what we're going to do is actually define a user put a user-defined contour in at our outlet and we're going to add that as a boundary so we want to do is go into our surface properties going to do a user-defined contour analysis push that down I happen to know I want that at 961 okay and before we leave here we'll go in and we'll turn on our user contours so we can see it okay so now it's displaying but we can't grab it separate from our surface to add as a boundary so to do that we'll grab an extract from surface and we'll just pull out our user contour okay and now that just generated a polyline we can use to add as a boundary so let's go ahead and do that got my pond and I'm going to add an outer boundary give it a name if I wanted to use that and there you can see the display of the surface update for us and the next thing we're gonna do is go in and get that staged storage volume brought out I'll give my composite service a little update here always good to keep on top of those so let's get that staged storage so I analyzed down here and we can fill out a name project name and everything if you wanted to specify how the volume calques going to run but the important thing just go out and get our data so define Bazin again I could give this a name and I'm going to use my surface contours to generate this so one thing to note you'll see that there's multiple levels of 961 put in there you know things aren't always flawless so we've got some extra rows where our volumes not actually increasing and we'll see where we want to trim that out once we get into SSA but for now that's okay we it is generating our volume so the next thing we just want to save that out and we can see it's getting this file format and just call that pond okay so that's all out now let's get let's export out to SSA before we do that we'll go into settings and I'm just going to show how things are translated so you may be familiar with the the older software used in conjunction with civil3d Hydra flow storm sewers it's actually going to use the same file type to push things out and some of the same part matching takes place so if we actually go into our settings and look at that edit in storm sewers and go to storm sewer migration part matching defaults we can look at okay when we import from storm sewer we import a combination Inlet circular we're going to get in its eccentrics regular civil 3d object you can also look at what comes in so when we push out from civil 3d there's a little bit of a limitation on what exactly goes out how that's read in SSA but the essentials of pipes of pipe catch basins and and Inlet that sort of thing all works just fine okay so to export I'm just going to grab a piece of my pipe Network now you've got you'll see the Edit and storm and sanitary analysis button here basically this is just an automation of popping open SSA importing our STM file or what's exported here and starting a new SPF or a new SS a project file for us doesn't always work it's not working for me right now I'll just be honest with you guys but there is another way it's not that much more difficult we just export the file manually there make sure we're grabbing everything we want okay and let's call this C 3 D 2 SSA ok now when you're working with stuff exported from your drawing in SSA sometimes it doesn't like you to have the drawing open so I'm just going to give this a little save and let's close the drawing out and we can come back to it I'm going to close this guy out too I don't need to save him ok let's switch over now we are in SSA ok so the first thing we're gonna do I'll just point you to some of this stuff we're not gonna have time to go through each and every little tool here but your toolbars are up top this is where things you use most often are you can go into display options here and reset how things look when they come in there's some nice tools for querying objects the main things you want to be aware of are right along this toolbar these are all the tools we're going to use to build out things so this is your sub-basin I'm just digitizing maybe I've got an inlet and outlet junction in a node and I'm just going and building things in here let's connect this to our inlet so by default things are set it's a circular pipe maybe we wanted it to be a culvert maybe it's an open channel one thing to be aware of is civil through SSA is kind of in between schematic and drafting so you can see that a length was assigned here to this link if I wanted to grill grab that and move it it's not going to automatically update even if I close out 819 okay but what we could do is we can come out here if I actually wanted that to represent represent where it is on the screen where it was moved to go in and recompute length look at it and you saw that update there so fairly simply you can build a model from scratch but let's go in and let's import what we got from civil3d I'm just grabbing multiple parts here and we'll Queen our Queen our stuff out so I'm going to open up a project that I had started earlier all I did was I got some of the hydrology set up I'll show you what we did here for every project you're gonna want to go into project options analysis and either an IDF curb or a rain gauge to assign everything you're going to need to run your analysis so we'll go into project options you can go metric if you want you can reset all the units you're using depth and elevation here's the cool stuff about SSA hydrology how we're getting our runoff so I'm going to use TR 20 for this example but these are all the different methods you can use and depending on a few years in the EPA swim it's going to ask you for different inputs as you go along there's the tread the old rational method if that's what you'd like to use we've got TR 20 available let's use that I'm going to do a time of concentration from TR 55 you saw all of the multiple options for for running your hydrology so that's a one of the big power pieces of SSA is its versatility there let's give it a minimum time of concentration so we don't go too short okay our routing you can have steady flow between nodes we can do kinematic wave to get our continuity and momentum accounted for or we can go hydrodynamic which is basically the next level of complexity and and accuracy this can account for a reversed flow you can get pressurized flow if you've got a manhole lid tied down and you're filled up it's going to it's going to be your most robust routing method and if we've got that available to us let's use it and then when things do become pressurized or if and when they do we can you say is in Williams or Darcy Weisbach here okay you can also go in and reset how the naming templates for things that come in a lot of properties you can get mess with but the big thing is you want to make sure your hydrology and your routing stuff is set up okay next thing is go into your analysis options there's a lot of fun tools in here we're not going to be able to get into the extent of everything you can do within here but the important piece is you need to run your analysis for a certain amount of time the default is that there's no time setup here so this would be you know set to 10 - I'm going to run this for two days I could do this by setting a number of hours if I wanted to I wanted to do three days leave it on to there if you are seeing some funny things happening with your routing you may want to give a lengthening time step so things have time to fully route along your your pipe runs so maybe if needed I'd give it a longer time step lengthening time step and this is for hydrodynamic and maybe I want to let's do a five second time step to have things a little bit more accurate and just calculated for a more tight time step okay your storm selection this is where you're going to input okay what what kind of frequency event what am I going to look for okay before we do that we define those those events over in rain gauges okay so what I've done when you start a new project this is all kind of gonna be blank okay and you're gonna want to add a new one and then we're gonna hit the ellipses here go out and define our time series you're going to add a new one so if I wanted to add let's just say I wanted to add maybe at one year go to your rainfall designer which which intensity curve are you working with okay so you many options in here depending on where you're working and what what your situation is I'm going to stick with a type two 24-hour SES you can do an intensity or cumulative and then this is all pre-built pre-built in SSA so what state am i working in well this one's in Minnesota County we're in Stearns County and I think I said I want a one-year event okay that's 2.2 24 hours rainfall okay so now I've got that one year built in there as well that I can choose from and I could go and add these in I could save this out if I wanted to okay cuz you can go in here and you can edit things you can insert a row for a new time and you can define your own custom curve and save that out if you wanted to okay and you can bring one those in that you've made you've saved out maybe from another project okay so that's my my rain gauge is defined and let's say I want to let's go with a ten year right now okay so we've got we've got that all set up now let's bring in our civil 3d data so I'm going to go to import hundred flow storm sewers right there it is you want to update the project yes I do and it's just going to give us a little log file of you know how what we did what we brought in etc will switch over back up to your toolbars for a second we've got a couple of tools for zooming and panning and moving around this is the one that I like to use you might be familiar in civil 3d you can do the double click middle mouse wheel and it'll zoom extents I'm not so in SSA you want to hit your zoom extents right up here well while we're looking up on the toolbar this is also where we're going to generate our reports these are overall reports so we've got the PDF in Excel here for your entire project and you can come in and set how you want those reports to come in what formats are available what what is to be included and there's a lot of stuff you can set up for how you want your report to look ok and move along move down the line and out flows Weir's so on and so forth and you can set everything for how that's going to be populated there okay so we've got our we've got our civil 3d data brought in one another thing we can do is we can import a background and this is what's not done through a layer manager and we can actually just bring in the drawing itself now this isn't actually going to bring in you know a see 3d drawing it's going to use it as like an image background basically but if you did have that drawing open in civil 3d it might bark at you a little bit and say hey what are you doing but it can be good for for reference especially if you're digitizing and moving things around okay first thing I'm going to do so our thought is a States to save things so what I'm going to do here before I get into setting up my analysis I'm going to go up and this may be a little bit confusing as to why I'm doing this at this point but when you do this civil3d to SSA and back workflow in the future you're going to see why you're going to see the want the workaround and come back to the video check it out and you'll be able to do this part so let's just call this import so this is right after it imported so what this is doing it's going to save the state of this project as it is without having to save a brand-new file right here so import okay and now let's go ahead and do our our modifications I'm going to grab my sub-basin so this is a sub-basin it doesn't actually have the hatching that you saw when I use the sub-basin tool up here but it was brought in from civil3d catchments and it is the sub-basin I'm just going to put it kind of where it lives so when you import from c3d your Inlet structure is going to have an off-site outfall right away so anything that comes up to the top of the rim of your structure is just sent off-site it's not necessarily accurate or what I want so I'm gonna go ahead and get rid of those outlets right away okay get rid of that one as well this is every every SSA Network doesn't need an outlet so this one I'm leaving in okay but what I am going to do so I'm going to right-click and you can do this with any type of node right-click on it and I'm going to convert this to something else and I'm going to use my storage node this is what I'm gonna use to model my pond okay but now like I just said I do need an outfall so let's put an outflow back in and we need to link those together so let's link them up okay I know that the bottom of the my pond is at 950 okay so I'm just going to set that in bird elevation of my outfall going to my pond or my storage node like I said I know the bottom of it is at 950 and let's just say the top is 965 here we can we can use a constant area in a multiplier for a functional type storage I'm going to do a storage curve and use that data I pushed out from civil3d so we've got we can go out and we can load our load our pond okay now I mentioned that this can bring in some extra rolls if we were to run the analysis this is going to say hey I want to increase at every row okay so all these extraneous rows I'm just going to right-click on it do a shift select there and once they stop increasing I'm just going to get rid of those okay so now we're all set up and we've got our our storage curb for that pond we could do some X filtration if we wanted to one of the nice things in SSA is we've got our handy-dandy charts just built right in let's just say maybe I've got sandy clay loam okay so we've got some exfiltration going out out of the pond - okay this should be all set up next thing I added that link in here okay and this isn't actually a pipe okay this is just saying that after you're in the pond that's the end of the model you're leaving the site so we can do that with a direct link and before I do that I'm actually going to set the invert and Inlet and outlet elevations and I'll set that back to a direct link okay so at this point we're going to go into our inlets one of the things I'm going to point to is that we can have this on grade or on sag if you've got it on grade you need to have a bypass link set up and so what that can do is that can okay if things come up over my Inlet I'm going to have a bypass link set down to my next Inlet and I was hoping to set some of these up for you we're getting a little tight on time so what I'm going to do is actually set this to on sag and then this is going to allow ponding on top of the inlet and then once there's more capacity it's going to run back through so I can go through and let's just set this down sag and make sure we got them all set okay set that down sag to allow ponding on say okay so at this point we should be ready to run our analysis so that's our little running man right up here and what this is telling me is that I didn't assign a rain gauge so it's pretty when you get these errors it's pretty nice it's fairly intuitive a lot of the time so let's assign our rain gauge let's go in here and assign to all sub basins here we go it's running our analysis I could save this out if I wanted to just save the state of the analysis okay and let's look at our profile plot it's going to ask me for a path of what I want to look at let's just go along here show the plot and this there just push a little update to that pipe okay so right now what this is showing is that at this time step this is the maximum hydraulic grade line and this this is the maximum water level achieved over the entire run the entire analysis which you're probably going to want to use here is to go to your output animation and we can actually watch this in real time over the storm of it and I'm just going to bump up the speed let's move this up to somewhere where it gets a little interesting and see some flow start happening and there we can watch our storm event and what that actually looks like okay we've also got profile plot our time series plot so we could go through and maybe look at what's our rainfall look like what's our runoff and at any time here we can go in right click we could export to excel or word any of these little pieces or as I said before your overall report for your whole model is right up top here you can export time series a lot you could put it right in your drawing and CAD if you wanted it on your plan set you can go to enhance the metafile to push it out to other programs like word okay so let's go back now let's say that well I didn't really need these twenty fours because we had plenty of capacity I'm gonna push those down to eight teens okay let's run my analysis one more time okay and now it's kind of barking at me saying that we're surcharged here okay so let's just take a look at what it actually looks like in our profile plot we'll do our output animation we got a little bit of surcharging up over the pipe they're not that big of a deal okay so what the changes I made was I bump these 24s down to 18s now here's where our work word flow for going back to civil 3d is important I had to add this direct flow link and if I were to push that back to civil 3d what it's going to do is it's going to say hey you got an extra pipe in here it's going to read it as a pipe it's going to create a new network not all bad but maybe I don't want to be creating new networks each time so the workaround there is to say okay I changed these two pipe sizes let's go back up and I'm going to make a new state well this may be analysis okay go up try to change options and I'm going to go back to that import state and restore that okay I wanted to go back to my analysis I could always restore that again I'm going to get rid of my extra little outfalls here and just make those changes that I know I made based on my analysis okay just changed a couple of sizes okay now I'm ready to go back to civil 3d export storm sewers file and we'll just give this a little number tag okay chase player exported you want the log file no thanks Regina necessay for now let's go back and open up our drawing in civil 3d you can see here these are twenty fours and let's import that back in from our updated SDM file do you want to update the pipe Network yes that's what I was doing and it's just saying that one of the structures was not matched exactly going SSA to civil3d but you can see that those updates were pushed back and now we have two 18s so with that little simple workflow workaround for missus a to Seoul 3d you can go out run your analysis and push things right back into so3 okay all right so sorry for running a little bit over time guys but we'll wrap this up here shortly what did we learn looked at the round trip from civil3d to ssa you do your prelim stuff in civil 3d set up your pipe network get that started okay is this going to work let's look at my run off do your analysis and with that work around I showed you you can do modification in SSA and then push back to civil 3d with that's STM file export we saw that hopefully I was able to portray in SSA a lot of the versatility we looked at all the different hydrology and hydraulic methods you can use some of the the ways that you can push reports out and view your analysis in plan view in that real time profile plot and time series plot I also did a little bit of just starting from scratch design you can do that in SSA too as well if you don't want to start in civil 3d or if you've got some other preliminary stage of analysis you're running

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Length: 36min 58sec (2218 seconds)

Published: Mon Oct 29 2018