{ "method": "ea-hydrology-unit-v1", "prepared_at": "2026-09-24T22:34:04.444319+00:00", "source_reference": "https://environment.data.gov.uk/hydrology/doc/reference", "source_scope": "EA Hydrology only. Seventeen checked parameter + identifier variants; this is derived source-contract enrichment, not a direct metadata fetch for every exported series. Explicit source metadata takes precedence; unknown or conflicting variants remain unresolved.", "metadata_request_count_this_review": 2, "source_rows_before_enrichment": 3642, "missing_units_before_enrichment": 3564, "rules": [ { "parameter": "level", "identifier_suffix_pattern": "level-(?:i|min|max)-(?:900|86400)-m-qualified", "unit": "m", "definition_uri": "http://qudt.org/1.1/vocab/unit#Meter", "representative_measure": "015b19f9-7973-4f0e-a9f8-4238c5019555-level-i-900-m-qualified", "source_metadata_url": "https://environment.data.gov.uk/hydrology/id/measures/015b19f9-7973-4f0e-a9f8-4238c5019555-level-i-900-m-qualified.json", "checked_at": "2026-09-24T20:27:28.464371+00:00", "http_status": 200, "source_measure": { "@id": "http://environment.data.gov.uk/hydrology/id/measures/015b19f9-7973-4f0e-a9f8-4238c5019555-level-i-900-m-qualified", "parameter": "level", "parameterName": "Level", "unitName": "m", "unit": { "@id": "http://qudt.org/1.1/vocab/unit#Meter" }, "label": "15min Level (m) time series for West Byfleet Bridge", "observedProperty": { "@id": "http://environment.data.gov.uk/reference/def/op/waterLevel", "label": "Water level", "type": [ { "@id": "http://www.w3.org/2004/02/skos/core#Concept" } ] } }, "affected_feature_count": 958, "interpretation": "Metres with datum unspecified by this series unit; do not infer river depth, stage datum, or Ordnance Datum from a nearby feed.", "response_sha256": "bc05bbcb655f6ae3dc04c7fe77a69ac759e1ee6670dfccf0cb5d315c057d7e10", "excerpt_sha256": "2353aef7133e0bd64309191f2724e528319e3fb74eb6584c2971acfc2ce36222" }, { "parameter": "flow", "identifier_suffix_pattern": "flow-(?:i|m|min|max)-(?:900|86400)-m3s-qualified", "unit": "m3/s", "definition_uri": "http://qudt.org/1.1/vocab/unit#CubicMeterPerSecond", "representative_measure": "024f218d-9a70-43b7-8ea2-7d038eeb2cff-flow-m-86400-m3s-qualified", "source_metadata_url": "https://environment.data.gov.uk/hydrology/id/measures/024f218d-9a70-43b7-8ea2-7d038eeb2cff-flow-m-86400-m3s-qualified.json", "checked_at": "2026-09-24T20:27:30.104672+00:00", "http_status": 200, "source_measure": { "@id": "http://environment.data.gov.uk/hydrology/id/measures/024f218d-9a70-43b7-8ea2-7d038eeb2cff-flow-m-86400-m3s-qualified", "parameter": "flow", "parameterName": "Flow", "unitName": "m3/s", "unit": { "@id": "http://qudt.org/1.1/vocab/unit#CubicMeterPerSecond" }, "label": "Daily mean Flow (m3/s) time series for Esher", "observedProperty": { "@id": "http://environment.data.gov.uk/reference/def/op/waterFlow", "label": "Water Flow", "type": [ { "@id": "http://www.w3.org/2004/02/skos/core#Concept" } ] } }, "affected_feature_count": 504, "interpretation": "Unit symbol from checked source metadata; no numeric conversion.", "response_sha256": "2a188331793ff4eebd0bd0a892ab1f53c86fb5dd9bcae74f727ab752dac74659", "excerpt_sha256": "5c549fdcfa7a5a9be2833f6753b50878cd9b75b1224347a6e53533c72bfacc01" }, { "parameter": "level", "identifier_suffix_pattern": "gw-(?:dipped-i|logged-i-subdaily)-mAOD-qualified", "unit": "mAOD", "definition_uri": "http://qudt.org/1.1/vocab/unit#Meter", "representative_measure": "05ceed28-6698-43a4-b75c-4cf9ccbe447d-gw-logged-i-subdaily-mAOD-qualified", "source_metadata_url": "https://environment.data.gov.uk/hydrology/id/measures/05ceed28-6698-43a4-b75c-4cf9ccbe447d-gw-logged-i-subdaily-mAOD-qualified.json", "checked_at": "2026-09-24T20:27:31.556991+00:00", "http_status": 200, "source_measure": { "@id": "http://environment.data.gov.uk/hydrology/id/measures/05ceed28-6698-43a4-b75c-4cf9ccbe447d-gw-logged-i-subdaily-mAOD-qualified", "parameter": "level", "parameterName": "GroundwaterLevel", "unitName": "mAOD", "unit": { "@id": "http://qudt.org/1.1/vocab/unit#Meter" }, "label": "Sub-daily Groundwater Logged (mAOD) time series for St Marys School", "observedProperty": { "@id": "http://environment.data.gov.uk/reference/def/op/groundwaterLevel", "label": "Groundwater level", "type": [ { "@id": "http://www.w3.org/2004/02/skos/core#Concept" } ] } }, "affected_feature_count": 357, "interpretation": "Metres above Ordnance Datum from the specific checked groundwater mAOD contract; not derived from Meter URI alone.", "response_sha256": "3989fc7d82d03ad4ff18acddc0d223aed6c27fd14333dabc40b437172c36c668", "excerpt_sha256": "b05705099a0032c31f66662e39a4ae100cff7711bdf13cfddbbcaf95fa3ab97d" }, { "parameter": "rainfall", "identifier_suffix_pattern": "rainfall-t-(?:900|86400)-mm-qualified", "unit": "mm", "definition_uri": "http://qudt.org/1.1/vocab/unit#Millimeter", "representative_measure": "05d55cc4-d0da-4293-bd9f-07025fdcd689-rainfall-t-86400-mm-qualified", "source_metadata_url": "https://environment.data.gov.uk/hydrology/id/measures/05d55cc4-d0da-4293-bd9f-07025fdcd689-rainfall-t-86400-mm-qualified.json", "checked_at": "2026-09-24T20:27:32.956790+00:00", "http_status": 200, "source_measure": { "@id": "http://environment.data.gov.uk/hydrology/id/measures/05d55cc4-d0da-4293-bd9f-07025fdcd689-rainfall-t-86400-mm-qualified", "parameter": "rainfall", "parameterName": "Rainfall", "unitName": "mm", "unit": { "@id": "http://qudt.org/1.1/vocab/unit#Millimeter" }, "label": "Daily total Rainfall (mm) time series for Eden Vale", "observedProperty": { "@id": "http://environment.data.gov.uk/reference/def/op/rainfall", "label": "Rainfall amount", "type": [ { "@id": "http://www.w3.org/2004/02/skos/core#Concept" } ] } }, "affected_feature_count": 211, "interpretation": "Unit symbol from checked source metadata; no numeric conversion.", "response_sha256": "4a9f1d5c837dc5078086a630519c53c6db1f23952d39707ae03bd131b4212760", "excerpt_sha256": "8829ba3f326fa70efb55eebca92cc0866aee1649507ea8dd93c50ae8ad21fbf1" }, { "parameter": "dissolved oxygen", "identifier_suffix_pattern": "do-i-subdaily-pct", "unit": "% saturation", "definition_uri": "http://qudt.org/vocab/unit/PERCENT", "representative_measure": "ANGEL1-do-i-subdaily-pct", "source_metadata_url": "https://environment.data.gov.uk/hydrology/id/measures/ANGEL1-do-i-subdaily-pct.json", "checked_at": "2026-09-24T22:29:16.128162+00:00", "http_status": 200, "source_measure": { "@id": "http://environment.data.gov.uk/hydrology/id/measures/ANGEL1-do-i-subdaily-pct", "parameter": "DISSOLVED OXYGEN", "parameterName": "Dissolved Oxygen", "unitName": "%", "unit": { "@id": "http://qudt.org/vocab/unit/PERCENT" }, "label": "Sub-daily Dissolved Oxygen (%) time series for ANGEL", "observedProperty": { "@id": "http://environment.data.gov.uk/reference/def/op/dissolved-oxygen", "broader": { "@id": "http://environment.data.gov.uk/reference/def/op/waterQuality" }, "label": "Dissolved Oxygen", "comment": "Concentration of dissolved oxygen in water, may have been measured chemically or optically", "type": [ { "@id": "http://www.w3.org/2004/02/skos/core#Concept" } ] } }, "affected_feature_count": 215, "interpretation": "The measure reports unitName % and PERCENT. Saturation is a derived interpretation of this oxygen-pct contract, supported by the Defra/Cefas account of EA dissolved-oxygen monitoring in percentage saturation and mg/L; not a mass concentration or pass/fail standard.", "response_sha256": "8dc300823e417d56c274faad792075931991eb2112cd4a131bff549843dec3ea", "excerpt_sha256": "4604b913ff1e38400d2afe83b3e43e53537490be247e472acfebcd7742c4722f", "interpretation_reference": "https://dsp.environment.data.gov.uk/dataset/0f85cbb1-69e7-4748-9b51-a551cab269ca" }, { "parameter": "dissolved oxygen", "identifier_suffix_pattern": "do-i-subdaily-mgL", "unit": "mg/L", "definition_uri": "http://qudt.org/vocab/unit/MilliGM-PER-L", "representative_measure": "BARIERA-do-i-subdaily-mgL", "source_metadata_url": "https://environment.data.gov.uk/hydrology/id/measures/BARIERA-do-i-subdaily-mgL.json", "checked_at": "2026-09-24T20:28:11.859186+00:00", "http_status": 200, "source_measure": { "@id": "http://environment.data.gov.uk/hydrology/id/measures/BARIERA-do-i-subdaily-mgL", "parameter": "DISSOLVED OXYGEN", "parameterName": "Dissolved Oxygen", "unitName": "mg/L", "unit": { "@id": "http://qudt.org/vocab/unit/MilliGM-PER-L" }, "label": "Sub-daily Dissolved Oxygen (mg/L) time series for THAMES_BARRIER GARDENS PIER_E_201506", "observedProperty": { "@id": "http://environment.data.gov.uk/reference/def/op/dissolved-oxygen", "broader": { "@id": "http://environment.data.gov.uk/reference/def/op/waterQuality" }, "label": "Dissolved Oxygen", "comment": "Concentration of dissolved oxygen in water, may have been measured chemically or optically", "type": [ { "@id": "http://www.w3.org/2004/02/skos/core#Concept" } ] } }, "affected_feature_count": 212, "interpretation": "Unit symbol from checked source metadata; no numeric conversion.", "excerpt_sha256": "a8956069a871032c60ce0fd7ec6ea6499ea837e8181342b3d97eb954dc814e2b" }, { "parameter": "temperature", "identifier_suffix_pattern": "temp-i-subdaily-C", "unit": "°C", "definition_uri": "http://qudt.org/vocab/unit/DEG_C", "representative_measure": "BARIERA-temp-i-subdaily-C", "source_metadata_url": "https://environment.data.gov.uk/hydrology/id/measures/BARIERA-temp-i-subdaily-C.json", "checked_at": "2026-09-24T20:28:11.859186+00:00", "http_status": 200, "source_measure": { "@id": "http://environment.data.gov.uk/hydrology/id/measures/BARIERA-temp-i-subdaily-C", "parameter": "TEMPERATURE", "parameterName": "Temperature", "unitName": "°C", "unit": { "@id": "http://qudt.org/vocab/unit/DEG_C" }, "label": "Sub-daily Temperature (°C) time series for THAMES_BARRIER GARDENS PIER_E_201506", "observedProperty": { "@id": "http://environment.data.gov.uk/reference/def/op/temperature", "broader": { "@id": "http://environment.data.gov.uk/reference/def/op/waterQuality" }, "label": "Temperature", "comment": "Water temperature", "type": [ { "@id": "http://www.w3.org/2004/02/skos/core#Concept" } ] } }, "affected_feature_count": 215, "interpretation": "Unit symbol from checked source metadata; no numeric conversion.", "excerpt_sha256": "fcf975ba365671344cf45716aaaf9926585ae8575f6fba680545d47ba9e27096" }, { "parameter": "ph", "identifier_suffix_pattern": "ph-i-subdaily", "unit": "pH (dimensionless)", "definition_uri": null, "representative_measure": "BARIERA-ph-i-subdaily", "source_metadata_url": "https://environment.data.gov.uk/hydrology/id/measures/BARIERA-ph-i-subdaily.json", "checked_at": "2026-09-24T20:28:11.859186+00:00", "http_status": 200, "source_measure": { "@id": "http://environment.data.gov.uk/hydrology/id/measures/BARIERA-ph-i-subdaily", "parameter": "PH", "parameterName": "PH", "unitName": null, "unit": null, "label": "Sub-daily PH time series for THAMES_BARRIER GARDENS PIER_E_201506", "observedProperty": { "@id": "http://environment.data.gov.uk/reference/def/op/ph", "broader": { "@id": "http://environment.data.gov.uk/reference/def/op/waterQuality" }, "label": "PH", "comment": "PH of water", "type": [ { "@id": "http://www.w3.org/2004/02/skos/core#Concept" } ] } }, "affected_feature_count": 214, "interpretation": "EA pH metadata omits a unit. The specific pH series is a logarithm of hydrogen-ion activity, a dimensionless quantity; missing metadata does not mean unknown physical units.", "excerpt_sha256": "076162c5acb2dae5915f02216fba65c291ffb8246869a4bc7222cf0049ac08f5", "interpretation_reference": "https://goldbook.iupac.org/terms/view/P04524" }, { "parameter": "conductivity", "identifier_suffix_pattern": "cond-i-subdaily-uS", "unit": "µS/cm", "definition_uri": "http://qudt.org/vocab/unit/MicroS-PER-CentiM", "representative_measure": "ANGEL1-cond-i-subdaily-uS", "source_metadata_url": "https://environment.data.gov.uk/hydrology/id/measures/ANGEL1-cond-i-subdaily-uS.json", "checked_at": "2026-09-24T22:29:17.517294+00:00", "http_status": 200, "source_measure": { "@id": "http://environment.data.gov.uk/hydrology/id/measures/ANGEL1-cond-i-subdaily-uS", "parameter": "CONDUCTIVITY", "parameterName": "Conductivity", "unitName": "µS/cm", "unit": { "@id": "http://qudt.org/vocab/unit/MicroS-PER-CentiM" }, "label": "Sub-daily Conductivity (µS/cm) time series for ANGEL", "observedProperty": { "@id": "http://environment.data.gov.uk/reference/def/op/conductivity", "broader": { "@id": "http://environment.data.gov.uk/reference/def/op/waterQuality" }, "label": "Conductivity", "comment": "Conductivity of water", "type": [ { "@id": "http://www.w3.org/2004/02/skos/core#Concept" } ] } }, "affected_feature_count": 212, "interpretation": "Unit symbol from checked source metadata; no numeric conversion.", "response_sha256": "f973655876ce98f9ffe818d5054e2dd11a92a7795dcfa3ff4e72ded071246e46", "excerpt_sha256": "09d52ce4478a9205533cd983f1291681e7798c3b1277d44547a87ae00158b065" }, { "parameter": "conductivity", "identifier_suffix_pattern": "cond-i-subdaily-mS", "unit": "mS/cm", "definition_uri": "http://qudt.org/vocab/unit/MilliS-PER-CentiM", "representative_measure": "BARIERA-cond-i-subdaily-mS", "source_metadata_url": "https://environment.data.gov.uk/hydrology/id/measures/BARIERA-cond-i-subdaily-mS.json", "checked_at": "2026-09-24T20:28:11.859186+00:00", "http_status": 200, "source_measure": { "@id": "http://environment.data.gov.uk/hydrology/id/measures/BARIERA-cond-i-subdaily-mS", "parameter": "CONDUCTIVITY", "parameterName": "Conductivity", "unitName": "mS/cm", "unit": { "@id": "http://qudt.org/vocab/unit/MilliS-PER-CentiM" }, "label": "Sub-daily Conductivity (mS/cm) time series for THAMES_BARRIER GARDENS PIER_E_201506", "observedProperty": { "@id": "http://environment.data.gov.uk/reference/def/op/conductivity", "broader": { "@id": "http://environment.data.gov.uk/reference/def/op/waterQuality" }, "label": "Conductivity", "comment": "Conductivity of water", "type": [ { "@id": "http://www.w3.org/2004/02/skos/core#Concept" } ] } }, "affected_feature_count": 3, "interpretation": "Unit symbol from checked source metadata; no numeric conversion.", "excerpt_sha256": "a2e13f21d59c315b3530b561436a3717ca17a7950c82d6fc4240fe4ef21c174a" }, { "parameter": "ammonium", "identifier_suffix_pattern": "amm-i-subdaily-mgL", "unit": "mg/L", "definition_uri": "http://qudt.org/vocab/unit/MilliGM-PER-L", "representative_measure": "BARIERA-amm-i-subdaily-mgL", "source_metadata_url": "https://environment.data.gov.uk/hydrology/id/measures/BARIERA-amm-i-subdaily-mgL.json", "checked_at": "2026-09-24T20:28:11.859186+00:00", "http_status": 200, "source_measure": { "@id": "http://environment.data.gov.uk/hydrology/id/measures/BARIERA-amm-i-subdaily-mgL", "parameter": "AMMONIUM", "parameterName": "Ammonium", "unitName": "mg/L", "unit": { "@id": "http://qudt.org/vocab/unit/MilliGM-PER-L" }, "label": "Sub-daily Ammonium (mg/L) time series for THAMES_BARRIER GARDENS PIER_E_201506", "observedProperty": { "@id": "http://environment.data.gov.uk/reference/def/op/ammonium", "broader": { "@id": "http://environment.data.gov.uk/reference/def/op/waterQuality" }, "label": "Ammonium", "comment": "Concentration of ammonium in water", "type": [ { "@id": "http://www.w3.org/2004/02/skos/core#Concept" } ] } }, "affected_feature_count": 211, "interpretation": "Publisher reports mg/L for ammonium; no as-nitrogen or as-ammonia conversion is inferred.", "excerpt_sha256": "d1dc2e0dcec7ef425ff6fdfec529687f9e487a9bad00c5ed84487ed1255dab49" }, { "parameter": "turbidity", "identifier_suffix_pattern": "turb-i-subdaily-ntu", "unit": "NTU", "definition_uri": "http://environment.data.gov.uk/reference/def/opunit/NTU", "representative_measure": "BARIERA-turb-i-subdaily-ntu", "source_metadata_url": "https://environment.data.gov.uk/hydrology/id/measures/BARIERA-turb-i-subdaily-ntu.json", "checked_at": "2026-09-24T20:28:11.859186+00:00", "http_status": 200, "source_measure": { "@id": "http://environment.data.gov.uk/hydrology/id/measures/BARIERA-turb-i-subdaily-ntu", "parameter": "TURBIDITY", "parameterName": "Turbidity", "unitName": "NTU", "unit": { "@id": "http://environment.data.gov.uk/reference/def/opunit/NTU" }, "label": "Sub-daily Turbidity (NTU) time series for THAMES_BARRIER GARDENS PIER_E_201506", "observedProperty": { "@id": "http://environment.data.gov.uk/reference/def/op/turbidity", "broader": { "@id": "http://environment.data.gov.uk/reference/def/op/waterQuality" }, "label": "Turbidity", "comment": "Turbidity or haziness of water, measured in Nephelometric Turbidity Units (NTU)", "type": [ { "@id": "http://www.w3.org/2004/02/skos/core#Concept" } ] } }, "affected_feature_count": 189, "interpretation": "Unit symbol from checked source metadata; no numeric conversion.", "excerpt_sha256": "8336c89d234fde6fd8e53ab2e5566bb515c6a0ddd2b9df4c1fdce1f7f0642769" }, { "parameter": "chlorophyll", "identifier_suffix_pattern": "cphyll-i-subdaily-ugpL", "unit": "µg/L", "definition_uri": "http://qudt.org/vocab/unit/MicroGM-PER-L", "representative_measure": "E45998A-cphyll-i-subdaily-ugpL", "source_metadata_url": "https://environment.data.gov.uk/hydrology/id/measures/E45998A-cphyll-i-subdaily-ugpL.json", "checked_at": "2026-09-24T20:28:11.859186+00:00", "http_status": 200, "source_measure": { "@id": "http://environment.data.gov.uk/hydrology/id/measures/E45998A-cphyll-i-subdaily-ugpL", "parameter": "CHLOROPHYLL", "parameterName": "Chlorophyll", "unitName": "µg/L", "unit": { "@id": "http://qudt.org/vocab/unit/MicroGM-PER-L" }, "label": "Sub-daily Chlorophyll (µg/L) time series for RAVENS BOURNE_GLASSMILL LANE_E_202507", "observedProperty": { "@id": "http://environment.data.gov.uk/reference/def/op/chlorophyll", "broader": { "@id": "http://environment.data.gov.uk/reference/def/op/waterQuality" }, "label": "Chlorophyll", "comment": "Concentration of Chlorophyll in water", "type": [ { "@id": "http://www.w3.org/2004/02/skos/core#Concept" } ] } }, "affected_feature_count": 43, "interpretation": "Unit symbol from checked source metadata; no numeric conversion.", "excerpt_sha256": "8dc75ca749ee4b786f22237e8328e32d56a21d452e8db19c6172955223121e0f" }, { "parameter": "salinity", "identifier_suffix_pattern": "sal-i-subdaily-psu", "unit": "PSU", "definition_uri": "http://environment.data.gov.uk/reference/def/opunit/PSU", "representative_measure": "BARIERA-sal-i-subdaily-psu", "source_metadata_url": "https://environment.data.gov.uk/hydrology/id/measures/BARIERA-sal-i-subdaily-psu.json", "checked_at": "2026-09-24T20:28:11.859186+00:00", "http_status": 200, "source_measure": { "@id": "http://environment.data.gov.uk/hydrology/id/measures/BARIERA-sal-i-subdaily-psu", "parameter": "SALINITY", "parameterName": "Salinity", "unitName": "PSU", "unit": { "@id": "http://environment.data.gov.uk/reference/def/opunit/PSU" }, "label": "Sub-daily Salinity (PSU) time series for THAMES_BARRIER GARDENS PIER_E_201506", "observedProperty": { "@id": "http://environment.data.gov.uk/reference/def/op/salinity", "broader": { "@id": "http://environment.data.gov.uk/reference/def/op/waterQuality" }, "label": "Salinity", "comment": "Quantity of dissolved salts in water in Practical Salinity Units (PSU)", "type": [ { "@id": "http://www.w3.org/2004/02/skos/core#Concept" } ] } }, "affected_feature_count": 7, "interpretation": "Preserves EA practical-salinity notation; no conversion to grams per litre.", "excerpt_sha256": "e40a31df3b79999ef0a5604971ffa597a77eb9c29246ebd7375a905ac19277e7" }, { "parameter": "nitrate", "identifier_suffix_pattern": "nitrate-i-subdaily-mgL", "unit": "mg/L (as N)", "definition_uri": "http://qudt.org/vocab/unit/MilliGM-PER-L", "representative_measure": "E11232A-nitrate-i-subdaily-mgL", "source_metadata_url": "https://environment.data.gov.uk/hydrology/id/measures/E11232A-nitrate-i-subdaily-mgL.json", "checked_at": "2026-09-24T20:28:11.859186+00:00", "http_status": 200, "source_measure": { "@id": "http://environment.data.gov.uk/hydrology/id/measures/E11232A-nitrate-i-subdaily-mgL", "parameter": "NITRATE", "parameterName": "Nitrate", "unitName": "mg/L (as N)", "unit": { "@id": "http://qudt.org/vocab/unit/MilliGM-PER-L" }, "label": "Sub-daily Nitrate (mg/L (as N)) time series for RED_REDBOURN OUTFALL_E_202201", "observedProperty": { "@id": "http://environment.data.gov.uk/reference/def/op/nitrate", "broader": { "@id": "http://environment.data.gov.uk/reference/def/op/waterQuality" }, "label": "Nitrate", "comment": "Nitrate (NO3) concentration in water measure as mg/L of N", "type": [ { "@id": "http://www.w3.org/2004/02/skos/core#Concept" } ] } }, "affected_feature_count": 6, "interpretation": "The checked source unitName and observedProperty comment explicitly specify nitrogen mass for nitrate. Do not apply this basis to other mgL series.", "excerpt_sha256": "4820edbb4194e9e108ce4019d6d592d22f4e98a9a38fb2c4a7586ac8224a6de7" }, { "parameter": "blue green algae", "identifier_suffix_pattern": "bga-i-subdaily-rfu", "unit": "RFU", "definition_uri": "http://environment.data.gov.uk/reference/def/opunit/RFU", "representative_measure": "E35998A-bga-i-subdaily-rfu", "source_metadata_url": "https://environment.data.gov.uk/hydrology/id/measures/E35998A-bga-i-subdaily-rfu.json", "checked_at": "2026-09-24T20:28:11.859186+00:00", "http_status": 200, "source_measure": { "@id": "http://environment.data.gov.uk/hydrology/id/measures/E35998A-bga-i-subdaily-rfu", "parameter": "BLUE GREEN ALGAE", "parameterName": "Blue-Green Algae", "unitName": "RFU", "unit": { "@id": "http://environment.data.gov.uk/reference/def/opunit/RFU" }, "label": "Sub-daily Blue-Green Algae (RFU) time series for THAMES_TAPLOW 2_K_202506", "observedProperty": { "@id": "http://environment.data.gov.uk/reference/def/op/bga", "broader": { "@id": "http://environment.data.gov.uk/reference/def/op/waterQuality" }, "label": "Blue-Green Algae", "comment": "Concentration of Blue-Green Algae in water", "type": [ { "@id": "http://www.w3.org/2004/02/skos/core#Concept" } ] } }, "affected_feature_count": 4, "interpretation": "Relative fluorescence units; retain instrument-relative meaning rather than convert to mass concentration.", "excerpt_sha256": "66c11978e35a77dc5e5fc2df1d3cb629c0ff70d91dce254660470394cfbc14e3" }, { "parameter": "fluorescent dissolved organic matter", "identifier_suffix_pattern": "fdom-i-subdaily-rfu", "unit": "RFU", "definition_uri": "http://environment.data.gov.uk/reference/def/opunit/RFU", "representative_measure": "E03573A-fdom-i-subdaily-rfu", "source_metadata_url": "https://environment.data.gov.uk/hydrology/id/measures/E03573A-fdom-i-subdaily-rfu.json", "checked_at": "2026-09-24T20:28:11.859186+00:00", "http_status": 200, "source_measure": { "@id": "http://environment.data.gov.uk/hydrology/id/measures/E03573A-fdom-i-subdaily-rfu", "parameter": "FLUORESCENT DISSOLVED ORGANIC MATTER", "parameterName": "Fluorescent Dissolved Organic Matter", "unitName": "RFU", "unit": { "@id": "http://environment.data.gov.uk/reference/def/opunit/RFU" }, "label": "Sub-daily Fluorescent Dissolved Organic Matter (RFU) time series for SOMERHILL_DS CONCRETE_E_202603", "observedProperty": { "@id": "http://environment.data.gov.uk/reference/def/op/fdom", "broader": { "@id": "http://environment.data.gov.uk/reference/def/op/waterQuality" }, "label": "Fluorescent Dissolved Organic Matter", "comment": "Amount of Fluorescent Organic Matter in water, measured in Relative Fluorescence Units (RFU)", "type": [ { "@id": "http://www.w3.org/2004/02/skos/core#Concept" } ] } }, "affected_feature_count": 3, "interpretation": "Relative fluorescence units; retain instrument-relative meaning rather than convert to mass concentration.", "excerpt_sha256": "b7bb234c8234c6decd4bc1430a0b0032220e37869d9bb328d4b19550f0688257" } ] }