Good Morning I am modeling an existing sanitary sewer in sewergems and I have some doubts: I am using Gvf-Convex, analyzing, the following happens and it is that I want to apply the tributary areas and successively calculate the flow with those areas. I have worked in the following way: Having my topology adjusted I enter the subject of areas through the thiessen method, in the same way I enter with the LoadBuilder tool and select my 2 shapes that are Thiessen's and the perimeter with the value of the average daily flow in its attribute table and in this way I made the calculation of flows for the different areas. My question is, is this correct way to work the flow rates or is there a better way to calculate it?
hydraulic model attachment
Modelo Hidráulico Tipo Alcantarillado Sanitario.rar
Hello Jefry,
From the description it appears that you could use Proportional Distribution by Population method in Loadbuilder. For that you require, thiessen polygon shapefile, flow boundary layer which should be a polygon shapefile and includes flow field for each polygon and a population polygon shapefile, where population information is mentioned.
This is explained in detail in below wiki, please go through it.
How do each of the LoadBuilder methods work?
In the model in sanitary control center, the loads are imported however Loadbuilder connection is not seen, did you import the sanitary loads manually, if used Loadbuilder, please let used which method is used so we can guide you accordingly.
Regards,
Sushma Choure
Bentley Technical Suppport
Hi Sushma The method that I used for the model was the following: LoadBuilder> Area Load Data "Proportional Distribution By Area". Where I apply the Thiessen method to the perimeter of my study area, in the created perimeter shape, it has information in its attribute table such as the average daily flow.
The shapefile THIESSEN PRUEBA 2 appears to be created using Thiessen polygon tool, which is required for the "Proportional Distribution By Area" method. And Perimetro file appears to be flow boundary which contains flow information. However there is single flow polygon for all the nodes, if you could divide that into multiple flow polygons which would overlap node's service area to divide flow, that would also be okay.
If you had billing meter data, you could have used point load data methods, if you have population or land use information of wards you could have used population / land use data methods. And when you have information about flow boundary layer containing flow data or population shapefiles, then using Thiessen polygon shapefiles you can distribute flow using area load methods.
Based on the information you have in the shapefiles selected for Loadbuilder, the approach appears to be correct, if that is what you are looking for here. If anything else is there, please comment further.