Birkin Bk
3 monitoring stations on this water in England, holding 660 values between 1986 and 2018. A named watercourse. The gauges below sit on it, at points its publisher records.
The monitoring network on this water
Hydrionis holds 660 values from 3 gauges on this water. Discharge is a property of a gauge and its reach, not of this water as a whole, so this page reports the network and its records rather than a single figure.
Every gauge Hydrionis holds here
| Gauge | Measures | Values | Record |
|---|---|---|---|
| BIRKIN BK | ept family richness, life flow index (family level), proportion of sediment-sensitive invertebrates, whpt average score per taxon, whpt number of scoring taxa | 255 | 1990–2018 |
| BIRKIN BK | ept family richness, life flow index (family level), proportion of sediment-sensitive invertebrates, whpt average score per taxon, whpt number of scoring taxa | 220 | 1986–2017 |
| BIRKIN BK | ept family richness, life flow index (family level), proportion of sediment-sensitive invertebrates, whpt average score per taxon, whpt number of scoring taxa | 185 | 1986–2017 |
How these gauges were attached to this water
Named by the publisher Each gauge here names this water in the publisher’s own station record. Hydrionis has not inferred the connection from station names.
| Gauge | Evidence | Established |
|---|---|---|
| BIRKIN BK | Stated by the publisher on the record this gauge’s observations came from. | With the observations |
| BIRKIN BK | Stated by the publisher on the record this gauge’s observations came from. | With the observations |
| BIRKIN BK | Stated by the publisher on the record this gauge’s observations came from. | With the observations |
What this record holds
Hydrionis decides which waters get a page, and which of those are offered to search, from what is actually held rather than from how the page reads. Five signals are counted; this record has 3 of them, which makes it a full profile.
| Signal | Held | Counts |
|---|---|---|
| Gauges holding a real record | 3 | yes, 3 or more |
| Years spanned | 33 | yes, 20 or more |
| Values held | 660 | no |
| Distinct measurements | 5 | yes, 2 or more |
| Publishers measuring it | 1 | no |
| Official identifiers | 1 | recorded, not counted |
Use this data
Use this data
- Machine-readable JSON
/api/v1/observations/by-subject/eco-ea-67757.json - How to cite this, and who you must credit
- How these figures were produced
- Request this at a different scale, format or geography
Attribution and citation
Attribution you are required to give
These are conditions of the licences the underlying data is published under. They are obligations to the publishers, not to Hydrionis, and they apply to you directly whether or not you mention Hydrionis at all.
Contains public sector information licensed under the Open Government Licence v3.0.
- Environment Agency — Open Government Licence v3.0 (licence text)
Suggested citation for Hydrionis
Hydrionis (2026), Birkin Bk gauge records, accessed 2026-09-02, hydrionis.com/waters/england-birkin-bk/
Cite Hydrionis where you rely on the compilation, the normalisation, the eligibility judgements or a chart. Where you use an unmodified published value, the publisher’s attribution is the one that is required; crediting Hydrionis as well is welcome and is not something Hydrionis can require of you.
Where these figures come from
Source: EA ecology — Ecology and Fish Data Explorer — freshwater macroinvertebrates, INV_OPEN_DATA_TAXA.csv. Licence: Open — attribution required (attribution required).
Method: Count of distinct mayfly, stonefly and caddisfly families in a standardised three-minute kick sample (method BT001). Every record is rolled up to its family through the Environment Agency’s own taxon dictionary before counting, because analysts identify to mixed ranks and counting raw taxa would measure the depth of identification. Records identified no further than the order are excluded.
Retrieved 28 August 2026.