Catchment: Derwent

Current state for 2026-05-14.

Catchment alert

1 sensor(s) are in alert state.

Review sensors for likely cause and confidence.

Catchment health score

76 /100
StatusWatch
Alerts1
Watch0
Avg trust1.00
  • 1 sensor alert state(s) are active today.



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What this says commercially

Catchment health is currently rated 76/100 (Watch). 1 alert-state sensor(s) and 0 watch-state sensor(s) are active in today's prepared view. The dashboard is identifying a moderate pressure state, useful for demonstrating early warning capability before severe degradation is visible across all sensors.

What this means operationally

DO % is currently below expected at Upstream. Overflow-related risk is currently low, so unexplained local changes would deserve more attention if they emerge. Recent rainfall is elevated enough to be considered an influencing factor in today’s readings.

Flow m³/s
—
Rainfall influence mm/last 6h
5.0
Air temperature °C
9.1
Overflow Incidents
0

Current sensor state

Upstream, Midstream and Downstream

Upstream

Alert
107.2%
8-day trend -4.1
Today avg
96.2%
Expected
103.5%
Variance
-7.3
vs yesterday+1.4
vs last week-4.1
vs last month-5.6
vs last year—
Water temp9.1°C
Trust1.00

Anomaly likely cause: uncertain · confidence 0.45

Midstream

Stable
119.7%
8-day trend -9.0
Today avg
101.4%
Expected
101.0%
Variance
+0.4
vs yesterday+1.1
vs last week-9.0
vs last month-27.4
vs last year-1.8
Water temp9.4°C
Trust1.00

Downstream

Stable
112.3%
8-day trend -8.2
Today avg
98.7%
Expected
100.9%
Variance
-2.2
vs yesterday+0.5
vs last week-8.2
vs last month-7.5
vs last year-4.5
Water temp9.4°C
Trust1.00

Overflow: Low risk

12 /100
Rain 6h max5.0
Overflow overlap0
Flow latest—
  • Rainfall proxy is elevated over the last 6 hours.

Alerts

Storm-overflow-linked anomalies

No storm overflow anomalies are likely today.

Main view

Observed vs expected today

Influencing factors

Flow, weather and overflow context

Catchment interpretation

What a user would likely ask first

  • Recent rainfall is elevated enough to be considered an influencing factor in today’s readings.

Calendar-accurate comparisons

Comparison dates used

Yesterday13 May 2026
Last week07 May 2026
Last month14 Apr 2026
Last year14 May 2025