Doorvaartopening (beweegbaar) Wirdumerklap

Opening #71 · route 12458

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Latest Clearance

-0.04 m ok

Water station: delfzijl.oudeeemskanaal.spuisluis Delfzijl Oude Eemskanaal Spuisluis
Water observed: 2026-08-28 05:30:00
Water level: 0.540 m
Calculated: 2026-08-28 06:10:39
Formula: kp_clearance_height_adjusted_by_current_nap_water_level

FIS Opening Fields

Source id: fis.opening:71
Parent id: 53468 (bridge)
Reference level: n/a
Height closed: 0.500 m
Clearance height closed: 1.830 m
Height opened: n/a
Width: 6.210 m
Sill depth: n/a
Route km: 14.400 - 14.409

Parent Bridge

Name: Wirdumerklap
Local id: 2258
RWS id: 53468
Source id: fis.bridge:2258
Reference level: KP
MHW reference: CANAL
MHW offset: n/a
Can open: yes

Linked Water Stations

Station	Method	Distance	Confidence	Latest Observation	Level
`delfzijl.oudeeemskanaal.spuisluis` Delfzijl Oude Eemskanaal Spuisluis	nearest_spatial	9,434 m	0.10	2026-08-28 05:30:00	0.540 m

Recent Clearance History

Calculated	Water Observed	Water Level	Clearance	Status	Formula
2026-08-28 06:10:39	2026-08-28 05:30:00	0.540 m	-0.040 m	ok	`kp_clearance_height_adjusted_by_current_nap_water_level`
2026-08-28 05:10:28	2026-08-28 04:40:00	0.520 m	-0.020 m	ok	`kp_clearance_height_adjusted_by_current_nap_water_level`
2026-08-28 04:10:15	2026-08-28 03:40:00	0.530 m	-0.030 m	ok	`kp_clearance_height_adjusted_by_current_nap_water_level`
2026-08-28 03:10:04	2026-08-28 02:30:00	0.530 m	-0.030 m	ok	`kp_clearance_height_adjusted_by_current_nap_water_level`
2026-08-28 02:09:52	2026-08-28 01:30:00	0.540 m	-0.040 m	ok	`kp_clearance_height_adjusted_by_current_nap_water_level`
2026-08-28 01:09:40	2026-08-28 00:40:00	0.520 m	-0.020 m	ok	`kp_clearance_height_adjusted_by_current_nap_water_level`
2026-08-28 00:09:28	2026-08-27 23:40:00	0.510 m	-0.010 m	ok	`kp_clearance_height_adjusted_by_current_nap_water_level`
2026-08-27 23:09:16	2026-08-27 22:30:00	0.500 m	0.000 m	ok	`kp_clearance_height_adjusted_by_current_nap_water_level`
2026-08-27 22:09:04	2026-08-27 21:40:00	0.510 m	-0.010 m	ok	`kp_clearance_height_adjusted_by_current_nap_water_level`
2026-08-27 21:08:52	2026-08-27 20:30:00	0.460 m	0.040 m	ok	`kp_clearance_height_adjusted_by_current_nap_water_level`
2026-08-27 20:08:39	2026-08-27 19:30:00	0.510 m	-0.010 m	ok	`kp_clearance_height_adjusted_by_current_nap_water_level`
2026-08-27 19:08:26	2026-08-27 18:30:00	0.510 m	-0.010 m	ok	`kp_clearance_height_adjusted_by_current_nap_water_level`
2026-08-27 18:08:11	2026-08-27 17:30:00	0.500 m	0.000 m	ok	`kp_clearance_height_adjusted_by_current_nap_water_level`
2026-08-27 17:07:49	2026-08-27 16:40:00	0.530 m	-0.030 m	ok	`kp_clearance_height_adjusted_by_current_nap_water_level`
2026-08-27 16:07:30	2026-08-27 15:40:00	0.510 m	-0.010 m	ok	`kp_clearance_height_adjusted_by_current_nap_water_level`
2026-08-27 15:07:18	2026-08-27 14:30:00	0.490 m	0.010 m	ok	`kp_clearance_height_adjusted_by_current_nap_water_level`
2026-08-27 14:07:06	2026-08-27 13:30:00	0.520 m	-0.020 m	ok	`kp_clearance_height_adjusted_by_current_nap_water_level`
2026-08-27 13:06:55	2026-08-27 12:30:00	0.510 m	-0.010 m	ok	`kp_clearance_height_adjusted_by_current_nap_water_level`
2026-08-27 12:06:43	2026-08-27 11:40:00	0.490 m	0.010 m	ok	`kp_clearance_height_adjusted_by_current_nap_water_level`
2026-08-27 11:06:31	2026-08-27 10:30:00	0.550 m	-0.050 m	ok	`kp_clearance_height_adjusted_by_current_nap_water_level`

Calculation Basis

{
    "formula": {
        "kind": "kp_clearance_height_adjusted_by_current_nap_water_level",
        "expression": "clearance_height_closed_m + ((height_closed_m - clearance_height_closed_m) - water_level_m)",
        "water_source": "water_level_observation.value_m",
        "height_source": "fis_bridge_opening.clearance_height_closed_m adjusted by inferred KP level",
        "kp_reference_level_nap": -1.33,
        "reference_level_source": "fis_bridge.reference_level",
        "reference_level_decision": "KP is treated as fixed kanaalpeil; FIS clearance height is adjusted by the current NAP water level delta from inferred KP",
        "effective_reference_level": "KP",
        "current_water_delta_from_kp_m": 1.87
    },
    "station_link": {
        "active": true,
        "method": "nearest_spatial",
        "confidence": 0.1,
        "distance_m": 9434.41,
        "reviewed_at": null
    },
    "parent_bridge": {
        "id": 2258,
        "name": "Wirdumerklap",
        "rws_id": "53468",
        "can_open": true,
        "source_id": "fis.bridge:2258",
        "mhw_offset": null,
        "reference_level": "KP",
        "mhw_reference_level": null
    },
    "bridge_opening": {
        "id": 71,
        "name": "Doorvaartopening (beweegbaar) Wirdumerklap",
        "route_id": "12458",
        "source_id": "fis.opening:71",
        "fairway_id": "57431",
        "route_km_end": 14.409,
        "route_km_begin": 14.4,
        "height_closed_m": 0.5,
        "height_opened_m": null,
        "reference_level": null,
        "fairway_section_id": "30986846",
        "clearance_height_closed_m": 1.83,
        "clearance_height_opened_m": null
    },
    "water_observation": {
        "value_m": 0.54,
        "value_cm": 54,
        "observed_at": "2026-08-28T05:30:00+00:00",
        "process_type": "meting",
        "quality_code": "00",
        "retrieved_at": "2026-08-28T06:10:29.877405+00:00",
        "station_code": "delfzijl.oudeeemskanaal.spuisluis",
        "reference_level": "NAP"
    }
}

Geometry GeoJSON

{
    "type": "Point",
    "coordinates": [
        6.787159895,
        53.314061434
    ]
}

Raw FIS JSON

{
    "id": 71,
    "type": "Feature",
    "geometry": {
        "type": "Point",
        "coordinates": [
            6.787159895000059,
            53.31406143400005
        ]
    },
    "properties": {
        "id": 2597,
        "name": "Doorvaartopening (beweegbaar) Wirdumerklap",
        "note": "Zelfbediening.",
        "type": "OPH",
        "width": 6.21,
        "isrsid": 9055474,
        "number": 1,
        "geotype": "opening",
        "routeid": 12458,
        "vincode": "3654",
        "objectid": 71,
        "parentid": 53468,
        "condition": "CONSTRUCTED",
        "fairwayid": 57431,
        "silldepth": null,
        "routekmend": 14.409,
        "foreigncode": null,
        "orientation": null,
        "widthconvoy": 6.21,
        "heightclosed": 0.5,
        "heightopened": null,
        "routekmbegin": 14.4,
        "geogeneration": 4119,
        "parentgeotype": "bridge",
        "fairwaysectionid": 30986846,
        "passagedurationm": 0,
        "clearanceheightclosed": 1.83,
        "clearanceheightopened": null
    }
}