Calculate stable water level use case (Water Overlay): Difference between revisions
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For the purposes of this scenario, a simple hydrological model will be assumed, with an inflow of water from an upstream source and a downstream means for water to leave the water system. | For the purposes of this scenario, a simple hydrological model will be assumed, with an inflow of water from an upstream source and a downstream means for water to leave the water system. | ||
== | ==Requirements== | ||
Before implementing this use-case, make sure you have a [[Basic water model use case (Water Overlay)|basic water model]] set up. For the specified scenario, the [[Rainfall_(Overlay)|rainfall overlay]] is recommended, although any variant will work. | |||
Also ensure the following in your project, if possible: | |||
* The hydrological system has appropriate inflows and outflows. | |||
* The hydrological system has a [[Surface last value result type (Water Overlay)|SURFACE_LAST_VALUE]] result type, either as main result or as a [[Result type (Water Overlay)#Multiple result child overlays|child result type]]. | |||
* The simulation is set up to output a reasonable amount of timeframes. For a stabilization case, one timeframe per 12 hours of simulation time is reasonable. | |||
| | |||
==Steps== | |||
The use-case can be implemented through the following steps. | |||
{{Editor steps|title=determine stable water levels | |||
|Configure a [[Basic water model use case (Water Overlay)|base hydrological system]]. | |||
|Ensure the overlay is (re)calculated. | |Ensure the overlay is (re)calculated. | ||
|Inspect the "Surface last value" result overlay. | |Inspect the "Surface last value" result overlay. | ||
|In the location where water should stabilize, place a point measurement using the measurement tool. | |In the location where water should stabilize, place a point measurement using the [[measurement tool]]. | ||
|If the line in the graph becomes horizontal, that's the time and level at which the water is stable. | |||
}} | }} | ||
{{article end | |||
A possibility for water to stabilize is most likely if the water inflow is constant, but the outflow increases as water in the system increases. A [[weir]] at the outflow side of the water system can effectuate this. | |notes= | ||
* A possibility for water to stabilize is most likely if the water inflow is constant, but the outflow increases as water in the system increases. A [[weir (Water Overlay)| Weir]] at the outflow side of the water system can effectuate this. | |||
It's possible that the water does not stabilize, if the water flows in faster than water can leave the water system. | * It's possible that the water does not stabilize, if the water flows in faster than water can leave the water system. | ||
* It's possible that the water in the water system is effectively exhausted before stability is reached, if water flows out faster than water enters the system. | |||
}} | |||
{{WaterOverlay usecases nav}} |
Latest revision as of 13:34, 27 May 2021
For water management purposes it can be relevant to know how water will stabilize throughout the system. This can be in a default situation, where there is a nominal amount of water in- and outflow. This can also be in a situation where the system is under duress, such as with a consistent amount of rainfall. There are multiple possible definitions of a stable water system, but a common characteristic is that the inflow and outflow match up, leading to either a consistent amount of water in the system or a predictable water rise/fall at points of measurement.
For the purposes of this scenario, a simple hydrological model will be assumed, with an inflow of water from an upstream source and a downstream means for water to leave the water system.
Requirements
Before implementing this use-case, make sure you have a basic water model set up. For the specified scenario, the rainfall overlay is recommended, although any variant will work.
Also ensure the following in your project, if possible:
- The hydrological system has appropriate inflows and outflows.
- The hydrological system has a SURFACE_LAST_VALUE result type, either as main result or as a child result type.
- The simulation is set up to output a reasonable amount of timeframes. For a stabilization case, one timeframe per 12 hours of simulation time is reasonable.
Steps
The use-case can be implemented through the following steps.
- Configure a base hydrological system.
- Ensure the overlay is (re)calculated.
- Inspect the "Surface last value" result overlay.
- In the location where water should stabilize, place a point measurement using the measurement tool.
- If the line in the graph becomes horizontal, that's the time and level at which the water is stable.
Notes
- A possibility for water to stabilize is most likely if the water inflow is constant, but the outflow increases as water in the system increases. A Weir at the outflow side of the water system can effectuate this.
- It's possible that the water does not stabilize, if the water flows in faster than water can leave the water system.
- It's possible that the water in the water system is effectively exhausted before stability is reached, if water flows out faster than water enters the system.