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Knowledge Base Software
Sewer



NETWORK ANALYSIS AND DESIGN
The Sewer Analysis and Design module is a complete tool for the design of foul water or sewerage networks. It will calculate the invert levels, slopes and diameters of the culverts as well as the design flow, capacity and the flow velocity of each culvert. The program will model a network with house connections consisting of both existing and new culverts. The design will take into account the hydraulic and geometric relationship between the different branches in the network. Attenuation is calculated at every manhole resulting in a solution, which is 30% to 100% more cost-effective than simply adding the inflow peaks together. Any culverts that do not have a size, invert level and/or slope will automatically be designed according to the design parameters.

Sewer also supports interactive drawing functionality in order to create and edit networks quickly and easily.
 
 


 

ANALYZES FLOW, OVERFLOW, CAPACITY, VELOCITY AND FLOW DEPTH

The program will simulate a complex system of local storage (surge tanks) and overflows thereby enabling you to model the intricate networks that are typical of modern cities. Each model may have multiple sub-networks and outfalls. You may specify the outfall levels if you wish to connect to existing systems. Alternatively, the program will determine the best possible outfall level in accordance with the design parameters.





CALCULATES OPTIMAL CULVERT SIZE, SLOPE, INLET AND OUTLET LEVELS

The sewer analysis will calculate the optimal network by designing according to the specified minimum cover, minimum and maximum flow velocities, minimum and maximum allowable link slopes and the available link sizes from the link tables.
 





 

FULL ERF CONNECTION DRAINAGE ANALYSIS USING MINIMUM ERF LEVEL

The erf connection analysis and design allows you to graphically insert erf connections while the program automatically determines the lowest point on each erf. The erf connection database can then be analyzed to report results and warn the user where erf connections are unable to drain to the main line. If necessary the main line can then be adjusted to accommodate the erf connections.





GRAPHICAL FUNCTIONS

Sewer manholes, culverts and erf connections can be defined and modified graphically. These functions allow you to easily insert nodes and links, make changes to an existing layout by moving a node, change the flow direction or query a node or link with a click of the mouse.
 





 

STANDARD AND USER DEFINED CULVERTS

The Link Tables allow the designer to define up to 15 different link types or culverts between nodes. These links may be circular (pipes), rectangular (box culverts), portal/skew haunch, or custom link types. Custom link types allow you to input the depth to proportional flow and depth to proportional area curves, thus enabling the use of non-standard culvert shapes such as egg-shaped pipes or even parabolic channels.





AUTOMATIC CULVERT SIZING USING PROPORTIONAL FLOW DEPTH

Culvert sizes are automatically chosen from the culvert catalogue according to a specified proportional flow depth. The maximum flow depth that will be allowed in the links is user defined - usually set to 80%.
 





 

UNIT FLOW CLASSES, HARMON FORMULA OR HYDROGRAPH INFLOWS

The Sewer module supports three inflow calculation methods: Unit Flow, Harmon, and Hydrograph. The Unit Flow method allows you to specify the number of contributing units of each class at every manhole. The Inflow Hydrograph method uses unit inflow hydrographs to determine the flow in the network over a period of time. In most cases multiple inflows may be specified at each node.





FLOWS ATTENUATED ACCORDING TO TOTAL CONTRIBUTING POPULATION

The peak design inflow is calculated and then attenuated according to the contributing population at that point in the network. In the case of the Unit Flow method the program will keep a total of all the units of each inflow class. At each node in the network it will calculate the total design flow as well as the total contributing population. The design flow is then adjusted according to the attenuation curve.
 





 

DYNAMIC TIME SIMULATION WITH MULTIPLE INFLOW HYDROGRAPHS

The Inflow Hydrograph method uses unit inflow hydrographs to determine the flow in the network over a period of time. The inflow hydrographs may be input with any time increment. You may view single or up to 10 hydrographs on a common set of axes which makes it easy to see how the flows from various branches interact with each other.





INFILTRATION BY PERCENTAGE FLOW OR BY LENGTH OF CULVERT

Extra inflow due to stormwater ingress into the sewer network may be defined as either a percentage of the sewer flow or a fixed inflow value per kilometer of sewer pipe.
 





 

PUMP STATIONS WITH UP TO 4 PUMPS WITH VARIOUS CONTROLS

Pump stations can contain up to 4 pumps with different characteristics and separate sets of control levels. The pump control levels work in combination with the pump station sump for which a depth-storage curve and initial depth must be defined.





SABS 1200 QUANTITIES WITH BEDDING MATERIAL/SELECTED BACKFILL

Culvert trench quantities are calculated according to SABS 1200 with user-defined depth increments. Quantities include excavation lengths, excavation volumes with extra over for intermediate and hard material, culvert lengths, bedding material volume and selected backfill volume. The ground profile is automatically extracted from the supporting digital terrain model.
 





 

CULVERT CLASH ANALYSIS WITH CROSSING SERVICES

This function checks for clashes between any two services such as sewer, storm, water, roads or other services defined in the crossing services. Problem areas are displayed on the layout drawing and the longitudinal section window can be opened to display a long section of the chosen branch as well as the crossing services. You may then adjust the invert levels and slopes of the affected culverts.





BITMAPS AND CADASTRAL BACKDROPS

View the network with a bitmap or cadastral data backdrop. Or display the site contours and slope shading to decide on an optimum network layout.
 





 

GENERATES LAYOUT PLAN WITH PIPE SCHEDULE AND LONG SECTIONS

Production drawings such as plans with pipe schedules and long sections with title blocks and company logos etc can be created with no or little CAD editing. The layout of production drawings is completely customizable according to your specific company standards. Crossing services from the other modules can also automatically be displayed on the plans, long and cross sections.





FULLY COMPATIBILITY WITH DWG AND OTHER FORMATS

Knowledge Base is a founder member of the Open Design Alliance and, as such, our inside knowledge of the DWG drawing structure ensures high compatibility when loading and saving DWG and DXF drawing formats. In addition we also support loading of Caddie CEX, Arcview SHP, Microstation DGN and Ultimate CAD UCX files. This gives you unprecedented flexibility to move between drawings without having to worry about incompatibilities and data exchange problems.
 

 

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