Places / demo-grassland-utrecht-haarzuilens
Demo grassland, Utrecht (Haarzuilens)
15.97 ha · grassland · NL · centroid 52.0517, 5.0530
Demonstration place: a grassland block west of Utrecht. Registered by the operator to show the satellite stream; no steward on record yet.
Verdict · 2026-Q4
Insufficient data
unknown: diversity, structure, renewal, cycling, resilience, autonomy
Streams
- Satellite: 469 clear observations, 2019-01-03 to 2026-10-15
- Sound recorders: 0
- Soil probes: 0
- Visits: 0
Soil (SoilGrids 250 m, ISRIC, CC BY 4.0): Cambisols, clay 38.9% · sand 19.7% · silt 41.4% · organic carbon 5.58% · pH 6.6
Last job: satellite.update · done
Seven readings
The verdict is the weakest of the seven. Unknown is a real answer: it says which stream still has to arrive.
Productivityholding
capturing energy and building biomass (satellite greenness over the growing season)
confidence 100% · held 2 periods
single-place reading: the last growing season against the place's own previous three; regional weather (a dry spring, a wet summer) is not yet subtracted because the neighbour crowd is not built
Diversityunknown
differentiating into many forms (species heard per year)
confidence 0% · held 0 periods
no sound stream yet: install a recorder and deliver detections
Structureunknown
trophic levels and habitat complexity (acoustic indices)
confidence 0% · held 0 periods
no acoustic indices yet (NDSI/ADI); deliver indices or let the server compute them from detections
Renewalunknown
reproducing and recruiting (breeding-season song)
confidence 0% · held 0 periods
no sound stream yet: breeding-season song is the renewal signal
Cyclingunknown
closing water and nutrient loops (water drawn by roots from the top 40 cm on dry days, against the day's evaporation)
confidence 0% · held 0 periods
no soil stream yet: install the moisture and temperature probes
Resilienceunknown
recovering after shocks (drought years in the satellite archive)
confidence 20% · held 0 periods
fewer than two shocks (>15% below the place's median) in the archive; resilience cannot be read yet
Autonomyunknown
holding its state with little management (machine noise)
confidence 0% · held 0 periods
no machine-noise signal yet; anthrophony from indices or engine detections from the recorder
Satellite greenness (NDVI), Sentinel-2
Each dot is one clear scene, cloud-masked with the scene classification layer, averaged over the pixels inside the boundary. Shaded bands are growing seasons.
| Growing season | Mean NDVI | Clear scenes |
|---|---|---|
| 2019 | 0.654 | 57 |
| 2020 | 0.604 | 60 |
| 2021 | 0.628 | 49 |
| 2022 | 0.622 | 18 |
| 2023 | 0.569 | 24 |
| 2024 | 0.678 | 22 |
| 2025 | 0.592 | 35 |
| 2026 | 0.585 | 35 |
Carbon, inferred (v0.1, a range, not an issuance)
Net ecosystem carbon balance per year: productivity from satellite greenness, minus soil breathing (from a temperature climatology until a probe exists), minus harvest export for this land use. Every parameter carries a low and a high value; the range is what the evidence supports. Credits would be issued for the lower bound. Method · JSON
| Year | Scenes | NPP t C/ha | Soil breathing t C/ha | Export t C/ha | Net t CO₂/ha (box) | Central | Lower bound for 16 ha, t CO₂ |
|---|---|---|---|---|---|---|---|
| 2019 | 91 | 6.7 to 12.4 | 2.6 to 4.7 | 1.7 to 5.6 | -12.9 to 29.6 | 9.1 | 0 |
| 2020 | 89 | 6.2 to 11.3 | 2.6 to 4.7 | 1.5 to 5.1 | -13.2 to 26.3 | 7.2 | 0 |
| 2021 | 79 | 6.3 to 11.6 | 2.6 to 4.7 | 1.6 to 5.2 | -13.2 to 27.1 | 7.6 | 0 |
| 2022 | 38 | 6.0 to 10.9 | 2.6 to 4.7 | 1.5 to 4.9 | -13.4 to 25.1 | 6.5 | 0 |
| 2023 | 33 | 6.2 to 11.4 | 2.6 to 4.7 | 1.6 to 5.1 | -13.2 to 26.5 | 7.3 | 0 |
| 2024 | 34 | 6.6 to 12.1 | 2.6 to 4.7 | 1.6 to 5.4 | -13.0 to 28.7 | 8.5 | 0 |
| 2025 | 57 | 5.9 to 10.8 | 2.6 to 4.7 | 1.5 to 4.9 | -13.4 to 24.7 | 6.3 | 0 |