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Diversions are used to divide an inflow into two outflows according to a distribution rule. This can be used to model structures that withdraw water from rivers for water supply or irrigation purposes, branches in canals, diversions at the inlet or outlet of reservoirs, stormwater overflows, etc.

Four approaches are possible for defining the distribution rule.

Threshold Value (Option 1)

Discharge distribution using a threshold value

In this case the second outflow only becomes active if the inflow exceeds the threshold of Qcrit. In the threshold value approach, the 2nd outlet (e.g. stormwater overflow) is only activated once a critical inflow Qcrit is exceeded, causing the throttled outflow to back up, reaching the overflow threshold. Since in reality a perfect division of the outflows after reaching the threshold value is usually never achieved, a diversion coefficient can also be specified in order to better represent actual conditions.

Definition of the diversion coefficient in Talsim-NG

It is defined as: [math]\displaystyle{ \mbox{diversion coefficient}= \frac{Q_{in}(Q_{out}=5 \cdot Q_{crit})}{Q_{crit}} }[/math]

Percentage Distribution (Option 2)

With this approach, the inflow is split into two outflows Qout1 and Qout2 according to a fixed percentage ratio.

Function (Option 3)

A relationship determined using hydraulic calculations or derived from operating rules between the discharge Qout1 and the inflow can be specified in the form of a function. The second outlet Qab2 will then output the remaining discharge.

Rules (Option 4)

Either of the two outlets can be controlled by scaling a value with a system state, optionally combined with a daily, weekly and/or annual pattern. The other outlet will then output the remaining discharge.

@@ Zeile 1: / Zeile 1: @@
 <languages/>
-{{Navigation|vorher=Consumer|hoch=Description of the system elements|nachher=Reservoir}}
+{{Navigation|vorher=Verbraucher|hoch=Beschreibung der Systemelemente|nachher=Speicher}}
-[[Special:MyLanguage/Datei:Systemelement005.png|50px|none|Symbol System Element Diversion]]
+[[Datei:Systemelement005.png|50px|none]]
-Splitting structures are used to divide an inflow into two outflows according to a distribution rule. Possible forms are withdrawal structures from rivers for supply or irrigation purposes, branching into overpasses, discharges in the inlet or outlet of dams, rain overflows, etc.
+Diversions are used to divide an inflow into two outflows according to a distribution rule. This can be used to model structures that withdraw water from rivers for water supply or irrigation purposes, branches in canals, diversions at the inlet or outlet of reservoirs, stormwater overflows, etc.
-[[Datei:Schema Verzweigung.png|Datei:Schema Verzweigung.png]]
+[[Datei:Schema Verzweigung_EN.png]]
-Three approaches are possible as distribution rules.
+Four approaches are possible for defining the distribution rule.
-==Threshold value model (Option 1)==
+==Threshold Value (Option 1)==
-[[Special:MyLanguage/File:Discharge_division_by_Threshold_Concept.png|thumb|Discharge_division_by_Threshold_Concept]]Here the second discharge is only activated from a critical inflow Qkrit. In the threshold value model, the 2nd outlet (e.g. RÜ: outlet channel) is only pressurized from a critical inflow Qcrit where the 1st outlet (e.g. RÜ: throttle) backs up to the overflow threshold. Since in reality a perfect division of the outflows after reaching the threshold value is usually not possible, the selectivity for the structure can also be specified for better recording of the actual conditions.
+[[Datei:Abflussaufteilung_nach_Schwellwertkonzept_EN.png|thumb|Discharge distribution using a threshold value]]
-[[Special:MyLanguage/Datei:Trennschärfe.png|thumb| Definition of the parameter Discriminatory Power in Talsim-NG]]
+In this case the second outflow only becomes active if the inflow exceeds the threshold of <code>Qcrit</code>. In the threshold value approach, the 2nd outlet (e.g. stormwater overflow) is only activated once a critical inflow <code>Qcrit</code> is exceeded, causing the throttled outflow to back up, reaching the overflow threshold. Since in reality a perfect division of the outflows after reaching the threshold value is usually never achieved, a diversion coefficient can also be specified in order to better represent actual conditions.
-It is defined as: <math>\mbox{selectivity }= \frac{Q_{ab}(Q_{zu}=5 \cdot Q_{krit})}{Q_{krit}}</math>
+[[Datei:Trennschärfe_EN.png|thumb|Definition of the diversion coefficient in Talsim-NG]]
+It is defined as: <math>\mbox{diversion coefficient}= \frac{Q_{in}(Q_{out}=5 \cdot Q_{crit})}{Q_{crit}}</math>
-== Percentage distribution (option 2)==
+== Percentage Distribution (Option 2)==
-Unabhängig vom Zufluss wird eine konstante Aufteilung in zwei Abläufe Qab1 und Qab2 gemäß einem bestimmten prozentualen Verhältnis vorgenommen. Auch hier besteht die Möglichkeit einer Veränderung der Aufteilung durch Skalierung.
+With this approach, the inflow is split into two outflows <code>Qout1</code> and <code>Qout2</code> according to a fixed percentage ratio.
-==Kennlinie (Option 3)==
+==Function (Option 3)==
-Eine aus hydraulischen Berechnungen oder aus Betriebsvorschriften resultierende Abhängigkeit zwischen dem Abfluss Qab1 und dem Zufluss wird als Polygonzug benutzt. Der zweite Ablauf Qab2 ermittelt sich als Restwert zwischen Zufluss – Qab1.
+A relationship determined using hydraulic calculations or derived from operating rules between the discharge <code>Qout1</code> and the inflow can be specified in the form of a function. The second outlet <code>Qab2</code> will then output the remaining discharge.
+==Rules (Option 4)==
+Either of the two outlets can be controlled by scaling a value with a [[Special:MyLanguage/Betriebsplan|system state]], optionally combined with a daily, weekly and/or annual pattern. The other outlet will then output the remaining discharge.