[Music] welcome to another water drop where we'll be setting up a simple water quality model and looking at some of the necessary considerations and infoworks ICM so is this for uh really I could only come up with one group here so just modelers needing to understand how water quality simulations get set up typically these are both for point source and non-point source as well as two-dimensional water quality models we're first going to look at some of the components that make up a point source simulation and set up that simulation to run and then also view those results next we'll look at some of the non-point Source methods the build up and wash off models as well as looking at 2D a 2d sediment model as well as some other options for two-dimensional water quality modeling starting off we're going to be looking at a one-dimensional point source type of water quality analyzes really the two main components we need here is some sort of inflow file there and then that's going to be associated with of course the name of a node in the network along with that we also need a palutograph so this is just defining the concentration of the different constituents lots of different options down here for modeling nitrogen or phosphorus sediment I've also got bod set up into here silicon in The Help menu there is a lot of information on what exactly all these things are and also provides you with a a lot more information on different setups for water quality models you can also set up the water quality in the Wastewater profile so you can have things associated with a water coming in from a Wastewater profile and as you can see again being dissolved or on some sort of fraction of the of the sediment fracture there one important note VOD is uh or hydrogen sulfide is reliant on VOD so in order to model hydrogen sulfide in the system you will need more you will need to to model the bod as well and more information on that can be found in The Help menu so looking at one of the runs that we have set up this is the diet the Run dialog where you can see I've had my inflow in there I've got my pollutograph in there and then key to this is use qm that's going to allow us to run a water quality simulation and if I open this up I've got these other boxes ticked but it doesn't really matter but just making sure that whatever you do on a model in that pollutograph that you have there to make sure that it's ticked on there as well so once you do run the simulations relatively quick process being able to do that I've already got one set up here though so I am going to zoom through that node that we have that polluter graph on whoops got a space in there um to look at some of the results from our our model so you've got the dissolved VOD on there as well as the sediment fractions I can look at the sediment going through coming from that system I can also kind of zoom out and then look to more of the downstream areas and what kind of sediment is going through those spaces as well how it eventually kind of trickles down into different parts of the network in different parts of the model so taking a look at some of the non-point Source related water quality modeling information all that data is going to be contained within the silk catchment information where you can see down here at the bottom the build up and wash off land uses there you can also find more information within the sub catch bits tab or the sub catchment table I should say under the build up and wash off land use tab there for the demo here I'm just going to make a dummy land use we've got these sweep intervals and sweep removals those can be used if you're using the swim methodology for build up wash off there are two different types of build up wash off models one being the Enterprise and one being the swim if I open up the properties here I can see those determinants in here for the different buildup types maximum buildup I've also got um similar dialogue for wash off of the different determinants and what kinds of methodology or efficiency they might have so here we have a two-dimensional model we're modeling some sediment in this area of the 2D mesh you'll notice first I have an initial condition sediment area not a whole lot of information in here really just defining the area that it is the real key to this is being able to include and initial conditions model object that will eventually be used in the run you can see I have this one set up for the 2D Zone naming that that initial condition uh object that I have in here the same as my initial condition Zone ID here to kind of match those up together the Zone type being a sediment there are other options for modeling water quality and then some other various specifications over here to Define which layer in this case for the sediment what type of layer it is what kind of composition it has the depth Etc like I mentioned since I've already used that one to run it as a read only but we do have the option for General more General water quality or you can just model the dissolved constituents as well as things attached to either one of the sediment sediment fractions sf1 or sf2 other considerations in here looking at one of the runs that I have set up of course we need the to use the qm just like any other water quality and then have everything else set up here as well there's some different options for whether the erosion of deposition will affect things model 2D bed load as well as erosion deposition options in there you can see I have that initial condition there along with an inflow file I've just got some inflows going into this area taking a look at the run in this case I do have a simulation already completed here where I do have this line results line drawn across if I click on that as you can see that's the just the name um I pull up a graphical type of view for this and then just graphing the highest concentration of that sf1 which is the only constituent I was modeling if I pull that up then I can see that highest concentration over the course of the simulation along with the setup that will go into the initial conditions and everything you'll also need to set up the water quality parameters so up in Model Model parameters and water quality and sediment parameters there is a wide variety of different inputs and things like that that will be needed in order for things to be run whether it's associated with the erosion deposition model or bed load model there's also some things in here for one-dimensional modeling and then some different inputs depending on these different types of bed load forms and uh modeling approaches for sediment and deposition sentiment erosion deposition these can be tweaked in here to the appropriate values so finally wrapping things up here like I mentioned through the video there are some good resources in The Help menu to be able to understand what the different parameters are and methodologies that get used in the water quality simulations of course as always reach out with any problems or issues that you might run into over here on the right is pictured a book that I have seen as a reference for some more of the sediment and erosion types of modeling I know I I know some stuff about soils but once you get down into those different methods it can be difficult to understand what the appropriate parameters should be what the different methodologies might be better suited for and so this is a book that could be used as a good reference for understanding that a bit better if that's of a significant interest foreign