Pollution controlActive

Austrian Nitrate Buffer Strips

Installation of 55 km of native grass and wildflower buffer strips along Austrian Danube tributaries to intercept agricultural nitrate and phosphorus before entering the main channel.

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Donau – Wien · HydroBASINS L8: 2060030640

Mar 2023 – ongoing

Niederösterreichische Landesregierung / ÖPUL agri-environment scheme / WWF Österreich

420 ha · € 2.3M

Sub-basin location

HydroBASINS Level 8 polygon

Sub-basin boundary: HydroBASINS Level 8 (HYBAS_ID 2060030640) · Polygon is approximate at this zoom

Basin Health Impact

Before vs. projected after project contribution

Water QuantityNo signal

Before

60Risk

Water Quality+9 pts

Before

55Risk

After

64Risk

Riparian Habitat+3 pts

Before

68Risk

After

71Good

Composite BHS contribution+3 pts

Weighted: Quantity × 0.45 + Quality × 0.20 + Habitat × 0.35

Ground Validation

IoT sensors · Galileo/EGNOS certified

Bratislava Flow Gauge

Discharge

Galileo ±0.3m

Sentinel-1 SAR coherence

Satellite: 2350 m³/sIn-situ: 2210 m³/s

94% agreement

Iron Gates Turbidity Probe

Turbidity

Galileo ±0.5m

Sentinel-2 B04 reflectance

Satellite: 24 NTUIn-situ: 22.1 NTU

92% agreement

In-situ readings from Galileo/EGNOS-certified IoT devices validate satellite-derived indices. High agreement confirms satellite-based BHS scoring for CSRD E3-4 discharge evidence.

Delivery metrics

Budget: € 2.3M
Area: 420 ha
Timeline: Mar 2023 – ongoing
Status: Active
Delivered: 38 km buffer established; nitrate interception ~22% on monitored reaches

Compliance exports

Two primary live clicks: project + compliance JSON

CSRD
ESRS E3-4Water consumption, basin stress and restoration contribution evidence
CSDDD
Article 8Adverse-impact mitigation programme linked to basin outcomes
SBTN
Step 3 — QuantityFreshwater target-setting inputs at sub-basin level
TNFD
LEAP — LocateNature-risk evidence for geolocated restoration activity

Using live score context

Using live basin score

Audit trail

Replay the evidence lineage for this stewardship project

Project geography
HydroBASINS Level-8 anchor and project centroid used for repeatable basin-level evidence generation.
```
hybas=2060030640
center=16.45000, 48.20000
```

Evalscript versions

Pinned, content-addressed evalscripts. Replayable byte-for-byte.

sentinel2-bhs-combined-v1@static-snapshot
outputs=ndwi,mndwi,ndvi,ndmi,turbidity,chla,bare

Source scenes
Recent STAC scene IDs attached to the basin score run for audit replay.
```
No STAC scene IDs attached
```
Scoring function
Basin sub-indices weighted via bhs-v0.5.0.
```
quantity*0.45 + habitat*0.35 + quality*0.2
```
Computation provenance
Run signature stored with the exported project evidence pack.
```
run=static-snapshot · at=2026-04-28T19:56:41.330Z
```

Partners

Operator

Niederösterreichische Landesregierung

Partner

ÖPUL agri-environment scheme / WWF Österreich

Basin context

Danube / Pannonian Basin

BHS 62 · 2 projects · 28M people

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