Weir height test case (Water Module): Difference between revisions
Jump to navigation
Jump to search
No edit summary |
|||
| (12 intermediate revisions by one other user not shown) | |||
| Line 1: | Line 1: | ||
This page contains information | This page contains information on what ways a [[Weir height (Water Overlay)|weir's height]] can be configured using a test case. It also shows what direct output you can inspect from a [[Weir (Water Overlay)|weir]]. Finally, several variants are also explored. | ||
==Description== | ==Description== | ||
| Line 81: | Line 81: | ||
[[File:Weir_flow_test_case_manuel_weir_height.png|thumb|200px|right|Weir height that is adjusting over time, visualized using the Measurement Tool's object attribute inspection.]] | [[File:Weir_flow_test_case_manuel_weir_height.png|thumb|200px|right|Weir height that is adjusting over time, visualized using the Measurement Tool's object attribute inspection.]] | ||
** Rectangular shape: [ 298.675, -324.174 ] , [ 301.613, -335.662 ] | ** Rectangular shape: [ 298.675, -324.174 ] , [ 301.613, -335.662 ] | ||
* [[Weir height (Water Overlay)|WEIR_HEIGHT]] = [ 0 0 600 0.2 1200 0.2 1500 0.2 1800 -0.5 2400 -0.5 2700 0 ]; | ** [[Weir height (Water Overlay)|WEIR_HEIGHT]] = [ 0 0 600 0.2 1200 0.2 1500 0.2 1800 -0.5 2400 -0.5 2700 0 ]; | ||
* Weir (Adjusting) | * Weir (Adjusting) | ||
** Rectangular shape: [ 298.406, -437.681 ] , [ 301.142, -449.731 ] | ** Rectangular shape: [ 298.406, -437.681 ] , [ 301.142, -449.731 ] | ||
** [[Weir target level (Water Overlay)|WEIR_TARGET_LEVEL]] = 0; | |||
====Overlay settings==== | ====Overlay settings==== | ||
| Line 94: | Line 95: | ||
* Groundwater: 0 (off) | * Groundwater: 0 (off) | ||
* Calculation mode: Accuracy | * Calculation mode: Accuracy | ||
* [[Timeframes (Water Overlay)|Timeframes]]: 30 | |||
* Output results: [[Surface last value result type (Water Overlay)|Surface last value]], [[Surface last datum result type (Water Overlay)|Surface last datum]] and [[Surface last datum result type (Water Overlay)|Surface elevation]] | * Output results: [[Surface last value result type (Water Overlay)|Surface last value]], [[Surface last datum result type (Water Overlay)|Surface last datum]] and [[Surface last datum result type (Water Overlay)|Surface elevation]] | ||
* [[Weir dam multiplier (Water Overlay)|WEIR_DAM_MULTIPLIER]] is set to 3; | * [[Weir dam multiplier (Water Overlay)|WEIR_DAM_MULTIPLIER]] is set to 3; | ||
| Line 101: | Line 103: | ||
==Output== | ==Output== | ||
Measured object graphs are displayed below. | Measured object graphs are displayed below. The following water overlay output attributes are inspected: | ||
* [[Object height output (Water Overlay)|Object height]], which is in meters relative to the {{datum}} | |||
* [[Object flow output (Water Overlay)|Object flow]], which is in m3/s | |||
* [[Object datum output a (Water Overlay)|Object datum a]] which is in meters relative to the {{datum}} | |||
* [[Object datum output b (Water Overlay)|Object datum b]] which is in meters relative to the {{datum}} | |||
====Weir with constant height==== | ====Weir with constant height==== | ||
| Line 156: | Line 162: | ||
==Variations== | ==Variations== | ||
====Weir adjustment interval==== | ====Weir adjustment interval==== | ||
Changing the [[Weir move interval s (Water Overlay)|WEIR_MOVE_INTERVAL_S]] from 10 seconds to 1 second | Changing the [[Weir move interval s (Water Overlay)|WEIR_MOVE_INTERVAL_S]] from 10 seconds to 1 second. This leads to more adjustments. It becomes more apparent with more timeframes (300 in stead of 30). | ||
<ul> | <ul> | ||
: Weir with an adjusting height: | : Weir with an adjusting height: | ||
| Line 163: | Line 170: | ||
<li style = "display:inline-block">[[File:weir_test_case_weir_adjusting_datum_a_1s.png|x300px|border]]</li> | <li style = "display:inline-block">[[File:weir_test_case_weir_adjusting_datum_a_1s.png|x300px|border]]</li> | ||
<li style = "display:inline-block">[[File:weir_test_case_weir_adjusting_datum_b_1s.png|x300px|border]]</li> | <li style = "display:inline-block">[[File:weir_test_case_weir_adjusting_datum_b_1s.png|x300px|border]]</li> | ||
: Weir adjusting height with 300 frames: | |||
<li style = "display:inline-block">[[File:weir_test_case_weir_adjusting_height_1s_0_01m_300f.png|x300px|border]]</li> | |||
<li style = "display:inline-block">[[File:weir_test_case_weir_adjusting_flow_1s_0_01m_300f.png|x300px|border]]</li> | |||
: Inlet: No changes. | : Inlet: No changes. | ||
: Outlet: | : Outlet: | ||
| Line 171: | Line 181: | ||
====Weir move step==== | ====Weir move step==== | ||
Changing the [[Weir move interval s (Water Overlay)|WEIR_MOVE_INTERVAL_S]] from 0.01 meter to 0. | Changing the [[Weir move interval s (Water Overlay)|WEIR_MOVE_INTERVAL_S]] from 0.01 meter to 0.05 meter. As you can see, this makes the adjustments more erratic. | ||
<ul> | <ul> | ||
: Weir with an adjusting height: | : Weir with an adjusting height: | ||
<li style = "display:inline-block">[[File: | <li style = "display:inline-block">[[File:weir_test_case_weir_adjusting_height_0_05m.png|x300px|border]]</li> | ||
<li style = "display:inline-block">[[File: | <li style = "display:inline-block">[[File:weir_test_case_weir_adjusting_flow_0_05m.png|x300px|border]]</li> | ||
<li style = "display:inline-block">[[File: | <li style = "display:inline-block">[[File:weir_test_case_weir_adjusting_datum_a_0_05m.png|x300px|border]]</li> | ||
<li style = "display:inline-block">[[File: | <li style = "display:inline-block">[[File:weir_test_case_weir_adjusting_datum_b_0_05m.png|x300px|border]]</li> | ||
: Inlet: No changes. | : Inlet: No changes. | ||
: Outlet: | : Outlet: | ||
<li style = "display:inline-block">[[File: | <li style = "display:inline-block">[[File:weir_test_case_outlet_adjusting_flow_0_05m.png|x300px|border]]</li> | ||
<li style = "display:inline-block">[[File:weir_test_case_outlet_adjusting_datum_a.png|x300px|border]]</li> | <li style = "display:inline-block">[[File:weir_test_case_outlet_adjusting_datum_a.png|x300px|border]]</li> | ||
<li style = "display:inline-block">[[File:weir_test_case_outlet_adjusting_datum_b.png|x300px|border]]</li> | <li style = "display:inline-block">[[File:weir_test_case_outlet_adjusting_datum_b.png|x300px|border]]</li> | ||
</ul> | </ul> | ||
==Conclusions== | |||
* Weirs can be made to adjust automatically based on changing water levels. | |||
* Be careful when changing the default values of the weir move attributes of the overlay. Do not set the adjustment time too low or the step too high. | |||
{{article end | {{article end | ||
|howtos= | |howtos= | ||
* [[How to inspect object output attributes of an overlay using the measurement tool | * [[How to inspect object output attributes of an overlay using the measurement tool]] | ||
* [[How to import a time sequence with a CSV]] | |||
}} | }} | ||
[[Category:Benchmarks]] | [[Category:Benchmarks]] | ||
{{Water Module buttons}} | {{Water Module buttons}} | ||
Latest revision as of 12:53, 3 February 2023
This page contains information on what ways a weir's height can be configured using a test case. It also shows what direct output you can inspect from a weir. Finally, several variants are also explored.
Description
This test case consists of several weirs situated in a waterway, with each weir having different properties. All weirs are part of the same Water Overlay's simulation. There is no rainfall in this test case. Instead water flow is provided by inlets and outlets, which can be set up either variable or constant.
Weir test case top down.
Boundary and initial conditions
- Waterways with weirs in the middle, separating two water areas.
- One inlet per waterway providing an influx of water, situated in the water area on the left.
- One outlet per waterway providing an outflux of water, situated in the water area on the right.
Parameter values
- Manning’s n: 0.03 (uniform)
- Model grid resolution: 1m
Technical setup
Waterways
Four waterways with a water depth of 2m and an angle of repose of 35 degrees, drawn with the following polygons:
- [187.0, -249.288], [418.0, -256.288]
- [413.0, -333.288], [189.0, -326.288]
- [194.0, -375.287], [411.0, -382.287]
- [404.0, -447.430], [194.0, -440.430]
Water Areas
Two areas divide the water ways into two sections:
- Water area (left)
- Rectangle shape: [301.0, -226.466], [158.884, -464.466]
- WATER_LEVEL = 0.0;
- Water area (right)
- Rectangle shape: [424.884, -226.466], [301.0, -464.466]
- WATER_LEVEL = 0.0;
Inlets
- Inlet (Constant):
- Rectangle shape: [189.82, -254.350], [202.08, -251.510]
- INLET_AREA = 1.0;
- INLET_Q = 1.0;
- LOWER_THRESHOLD = -10 000 (inactive);
- UPPER_THRESHOLD = -10 000 (inactive);
- Inlet (Manual)
- Rectangle shape: [192.116, -331.225], [199.453, -328.390]
- INLET_AREA = 1.0;
- INLET_Q = 1.0;
- LOWER_THRESHOLD = -10 000 (inactive);
- UPPER_THRESHOLD = -10 000 (inactive);
- Inlet (Adjusting)
- Rectangle shape: [197.019, -444.276], [204.623, -441.738]
- INLET_AREA = 1.0;
- INLET_Q = [0, 1, 600, 1, 900, 1.5, 1200, 1.5, 1800, 1.5, 2400, 1, 3600, 1];
- LOWER_THRESHOLD = -10 000 (inactive);
- UPPER_THRESHOLD = -10 000 (inactive);
Outlets
Each outlet is set up with the following attributes to remove the water that passed through the weir:
- INLET_AREA = 1.0;
- INLET_Q = 0;
- UPPER_THRESHOLD = -0.5;
The outlets are situated at:
- Outlet (Constant):
- Rectangle shape: [414.554, -250.689] , [396.786, -253.873]
- Outlet (Manual):
- Rectangle shape: [410.115, -327.753] , [ 393.13, -330.9620 ]
- Outlet (Adjusting):
- Rectangle shape: [ 401.072, -442.541 ], [ 383.968, -445.520 ]
Weirs
Each weir is setup using a rectangular shape, and direction angle and a weir height and width:
- WEIR_ANGLE = 270 degrees;
- WEIR_HEIGHT = 0 m;
- WEIR_WIDTH = 5 m;
Weir specific:
- Weir (Constant)
- Rectangular shape: [ 299.593, -248.328 ] , [ 302.229, -257.983 ]
- Weir (Manual)
- Rectangular shape: [ 298.675, -324.174 ] , [ 301.613, -335.662 ]
- WEIR_HEIGHT = [ 0 0 600 0.2 1200 0.2 1500 0.2 1800 -0.5 2400 -0.5 2700 0 ];
- Weir (Adjusting)
- Rectangular shape: [ 298.406, -437.681 ] , [ 301.142, -449.731 ]
- WEIR_TARGET_LEVEL = 0;
Overlay settings
General parameters that have been used:
- Type of overlay: Rainfall Overlay
- Weather:
- Evaporation: 0 mm
- Rain: 0 mm
- Simulate for: 1.5 hours.
- Groundwater: 0 (off)
- Calculation mode: Accuracy
- Timeframes: 30
- Output results: Surface last value, Surface last datum and Surface elevation
- WEIR_DAM_MULTIPLIER is set to 3;
- WEIR_MOVE_RANGE_M is set to 1 meter;
- WEIR_MOVE_INTERVAL_S is set to 10 seconds;
- WEIR_MOVE_STEP_M is set to 0,01 meter.
Output
Measured object graphs are displayed below. The following water overlay output attributes are inspected:
- Object height, which is in meters relative to the datum
- Object flow, which is in m3/s
- Object datum a which is in meters relative to the datum
- Object datum b which is in meters relative to the datum
Weir with constant height
- Weir with a constant height:
- Inlet:
- Outlet:
Weir with manual configured changing height
- Weir with a manual configured changing height:
- Inlet:
- Outlet:
Weir with adjusting height
- Weir with an adjusting height:
- Inlet:
- Outlet:
Variations
Weir adjustment interval
Changing the WEIR_MOVE_INTERVAL_S from 10 seconds to 1 second. This leads to more adjustments. It becomes more apparent with more timeframes (300 in stead of 30).
- Weir with an adjusting height:
- Weir adjusting height with 300 frames:
- Inlet: No changes.
- Outlet:
Weir move step
Changing the WEIR_MOVE_INTERVAL_S from 0.01 meter to 0.05 meter. As you can see, this makes the adjustments more erratic.
- Weir with an adjusting height:
- Inlet: No changes.
- Outlet:
Conclusions
- Weirs can be made to adjust automatically based on changing water levels.
- Be careful when changing the default values of the weir move attributes of the overlay. Do not set the adjustment time too low or the step too high.
How-to's
