125 lines
5.9 KiB
HTML
125 lines
5.9 KiB
HTML
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<title>EPANET: [SOURCES]</title>
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<tr style="height: 56px;">
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<td id="projectalign" style="padding-left: 0.5em;">
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<div id="projectname">EPANET
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 <span id="projectnumber">2.2.0</span>
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</div>
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<ul>
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<li class="navelem"><a class="el" href="_files.html">Toolkit Files</a></li><li class="navelem"><a class="el" href="_inp_file.html">Input File</a></li> </ul>
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</div>
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</div><!-- top -->
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<div class="PageDoc"><div class="header">
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<div class="headertitle">
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<div class="title">[SOURCES] </div> </div>
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</div><!--header-->
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<div class="contents">
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<div class="textblock"><p><b>Purpose:</b></p>
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<p>Defines locations of water quality sources.</p>
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<p><b>Format:</b></p>
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<p>One line for each water quality source containing:</p><ul>
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<li>Node ID label</li>
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<li>Source type (<b>CONCEN, MASS, FLOWPACED, or SETPOINT</b>)</li>
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<li>Baseline source strength</li>
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<li>Time pattern ID (optional)</li>
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</ul>
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<p><b>Remarks:</b></p><ol type="1">
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<li>For <b>MASS</b> type sources, strength is measured in mass flow per minute. All other types measure source strength in concentration units.</li>
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<li>Source strength can be made to vary over time by specifying a time pattern.</li>
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<li>A <b>CONCEN</b> source:<ul>
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<li>represents the concentration of any external source inflow to the node</li>
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<li>applies only when the node has a net negative demand (water enters the network at the node)</li>
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<li>if the node is a junction, reported concentration is the result of mixing the source flow and inflow from the rest of the network</li>
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<li>if the node is a reservoir, the reported concentration is the source concentration</li>
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<li>if the node is a tank, the reported concentration is the internal concentration of the tank</li>
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<li>is best used for nodes that represent source water supplies or treatment works (e.g., reservoirs or nodes assigned a negative demand)</li>
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<li>do not use at storage tanks with simultaneous inflow/outflow.</li>
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</ul>
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</li>
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<li>A <b>MASS, FLOWPACED, or SETPOINT</b> source:<ul>
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<li>represents a booster source, where the substance is injected directly into the network regardless of what the demand at the node is</li>
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<li>affects water leaving the node to the rest of the network in the following way:<ul>
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<li>a <b>MASS</b> booster adds a fixed mass flow to that resulting from inflow to the node</li>
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<li>a <b>FLOWPACED</b> booster adds a fixed concentration to the resultant inflow concentration at the node</li>
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<li>a <b>SETPOINT</b> booster fixes the concentration of any flow leaving the node (as long as the concentration resulting from the inflows is below the setpoint)</li>
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</ul>
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</li>
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<li>the reported concentration at a junction or reservoir booster source is the concentration that results after the boosting is applied; the reported concentration for a tank with a booster source is the internal concentration of the tank</li>
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<li>is best used to model direct injection of a tracer or disinfectant into the network or to model a contaminant intrusion.</li>
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</ul>
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</li>
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<li>A <b></b>[SOURCES] section is not needed for simulating water age or source tracing.</li>
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</ol>
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<p><b>Example:</b><br />
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</p><div class="fragment"><div class="line">[SOURCES] </div>
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<div class="line">;Node Type Strength Pattern </div>
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<div class="line">;-------------------------------- </div>
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<div class="line">N1 CONCEN 1.2 Pat1 ;Concentration varies with time </div>
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<div class="line">N44 MASS 12 ;Constant mass injection </div>
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