Time of Concentration Calculator

Time of Concentration is the time it takes for water to flow to its outlet from the farthest point on a catchment. 12d Model will calculate the Time of Concentration for a catchment based on the 'Finished Surface', and the flow lines that you draft. There are three steps: Draft the flow line that shows [...]
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Pipe Velocity

Velocity Calculation At EACH TIME STEP the Dynamic Drainage Engine performs the following calculations for each node and conduit in the network: Velocity at Upstream and Downstream ends of the Conduit The water surface level at each node is calculated. This is done by determining the volume of water stored at each node at that [...]
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Excess Flow and Qx Routing

Excess Flow - Hydraulics for the Rational Method Excess flow (Qx) occurs when more water arrives at a node than the downstream link (pipe) can carry. Or to put it another way: the pipe taking water away from the node is too small. Excess Flow in your network must not be ignored. You MUST deal [...]
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Attribute Management for Digital Engineering

Sharing 12d Model data in a Digital Engineering environment is easy, using 12d Model's IFC Express writer. Controlling the flow of data from 12d Model is done by grouping the required attributes into a 'Tree' structure (using the Attribute Manipulator), then choosing to export the attributes in that 'Tree'. Using the 'Attribute Manipulator' to create [...]
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Dynamic Drainage – Major and Minor Attribute Groups

Compare Analysis Results for Major & Minor Events Each time a Dynamic Drainage analysis is completed, the results of the analysis are stored as attributes on the nodes and links. These attributes can be exported to spreadsheet and plotted onto plans or longsections. To keep the results of the Dynamic Analysis separate from the results [...]
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Create Culvert Headwalls

Headwalls are created quickly and easily in 12d Model. In 12d Model 12 the command is Design=>Drainage/Sewer=>Create=>Create Culvert Headwalls In 12d Model 14 the command is Water=>Water String=>Create=>Create Culvert Headwalls The Node Type MUST start with (uppercase) 'HW.'  You can use the Headwall types that are shipped with 12d Model (ie HW in and HW [...]
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Configure 12d Model – Overview

Configuration of 12d Model is done by editing one of the many files that are read when the project starts. Configuration files typically end with " .4d " Examples are 'drainage.4d (definitions of pits and pipes), survey.4d (definitions of survey instruments), linestyl.4d, symbols.4d and there are many more. On Start up, 12d Model looks in [...]
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Connecting Trimble Instruments to 12d Field

Using 12d Field with Trimble instruments Connecting  12d Field to your Trimble Instrument requires FIVE steps. These are summarised here, and detailed instructions are given below. Install the TPSDKRedist.Win32.exe. DO THIS FIRST This is a Trimble Re-distributible package. Scroll down for more detailed instructions. Register on the Trimble Website, to get a username and password. [...]
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