README.md

metadata

pretty_name: EEA Waterbase Optics5 — Cleaned River Measurements (2015–2017)
license: other
license_name: eea-reuse-policy
license_link: https://www.eea.europa.eu/en/legal-notice
language:
  - en
tags:
  - water-quality
  - environmental
  - eea
  - wise
  - eu
  - hydrology
  - sentinel-2
  - remote-sensing
  - river
size_categories:
  - 100K<n<1M

EEA Waterbase Optics5 — Cleaned River Measurements (2015–2017)

Filtered and cleaned subset of the EEA Waterbase – Water Quality ICM (WISE-4) v2018.1 prepared for training Sentinel-2 water quality models.

Produced during the 11th CASSINI Hackathon – EU Space for Water.

Filtering criteria

• Water body category: rivers only (parameterWaterBodyCategory = RW)
• Station coordinates: stations must have valid lon and lat
• Date window: 2015-07-01 – 2017-12-31 (aligned with Sentinel-2A availability)
• Determinands (Optics5): five parameters with the strongest expected link to Sentinel-2 surface reflectance

Code	Parameter	Unit
EEA_3133-01-5	Dissolved oxygen	mg{O2}/L
EEA_3131-01-9	Oxygen saturation	%
CAS_14797-55-8	Nitrate	mg{NO3}/L
CAS_14798-03-9	Ammonium	mg{NH4}/L
CAS_14265-44-2	Phosphate-P	mg{P}/L

Files

measurements_optics5_long.parquet

Long-format table of all individual measurements. One row per (station, sampling date, determinand).

Column	Description
station_id	Monitoring site identifier
lat, lon	Station coordinates (WGS84)
sampling_date	Date of measurement
determinand_code	One of the Optics5 codes above
value	Observed value (numeric)
unit	Unit of measurement
below_loq	Flag: value is below limit of quantification
loq_value	Limit of quantification value

4,757 stations · 251,245 rows · 2015-07-01 to 2017-12-31

Determinand breakdown:

Code	Rows	Stations
EEA_3133-01-5	32,330	3,594
EEA_3131-01-9	33,301	3,163
CAS_14797-55-8	63,488	3,641
CAS_14798-03-9	65,025	3,495
CAS_14265-44-2	57,101	3,122

station_index_optics5.parquet

One row per eligible station with summary statistics.

Column	Description
station_id	Monitoring site identifier
lat, lon	Station coordinates (WGS84)
first_date	Earliest measurement date in window
last_date	Latest measurement date in window
n_measurements	Total number of non-null value rows
n_determinands	Number of distinct Optics5 codes measured

4,757 rows

station_year_coverage_optics5.parquet

Audit table: number of measurements per station, year, and determinand code.

Column	Description
station_id	Monitoring site identifier
year	Calendar year
determinand_code	Optics5 determinand code
n_measurements	Number of measurements in that year

33,419 rows

Intended use

Each training sample for a Sentinel-2 model is a (station, date) pair joined to the nearest cloud-free Sentinel-2 scene within a ±N day window. Separate models (or a multitask model with target masking) are trained per determinand — co-presence of all five codes on the same date is not required.

Source

Derived from cassini-team-todo/eea-waterbase (mirror of EEA Waterbase WISE-4 v2018.1). Original data © European Environment Agency, reused under the EEA reuse policy.