Public water reading
Spain
Spain, Spain · 39.0219, 1.6063 · one hundred six and a half hectares of water
Good water, pressed at the margin.
This body of water is sound water with clear regenerative upside at its edge, scoring 71 out of 100. The water reads clear from orbit. 10 of 12 sources answered; the silent ones lowered confidence, not the score.
Five readings
10 of 12 sources answered · 100% of pillar weight read · silent: the water trace, the hazard screen
The water
What this body is, how it reads from orbit, whether it stays, and the basin it sits in.
The body
Clarity · from orbit
One Sentinel-2 pass, 2026-10-08, 11% cloud in the scene. Indices, not concentrations: a bottle to a lab decides; this says where to dip it.
Permanence · 1984–2021
The basin
The edge
What the shore is made of, what lives here, what presses on the water, and what the climate does to it.
The shore · 300 m ring
- Tree cover 60%
- Grassland 19%
- Bare / sparse 11%
- Shrubland 6%
- Built-up 4%
Life
Most recorded: Peyssonnelia squamaria · Peyssonnelia rubra · Peyssonnelia dubyi · Peyssonnelia harveyana
Pressure
Climate · to 2050
Expect is the honest verb: the middle of a range of futures, one scenario, not a certainty. Warmer air means warmer, more stratified water and more evaporation.
The reading
What the figures mean together, what to do first, how to check it, and what only the water itself can answer.
Findings
- Opportunity
The water reads clear from orbit.
Clear water is the rarest condition to keep and the cheapest to lose; it says the catchment above is still holding its soil.
Turbidity index -0.1, chlorophyll index 0.1 over 1,196 water pixels. · medium confidence
- Permanence
This water has stayed, year after year, for four decades.
Permanence is the first property of a water asset: what stays can be planned around; what comes and goes must be designed for.
99% permanent, 1% seasonal; where water was seen it was present 98% of the time (JRC Global Surface Water, Landsat 1984–2021). · high confidence
- Clarity
100% of the boundary read as open water on the latest clear pass.
The share of the drawn boundary the scene classifies as water says whether the reading is about the water or about its edge.
Sentinel-2 scene classification, 2026-10-08; turbidity clear, chlorophyll moderate. · medium confidence
- Climate
The surface of the water read 24.5 °C on the latest clear thermal pass.
Surface temperature governs how much oxygen the water can hold and how fast it stratifies.
Landsat Collection 2 surface temperature, 2026-10-05; a skin reading from orbit, warmer than the water a metre down. · medium confidence
- The shore
The shore is mostly natural cover.
The edge decides what reaches the water: a wooded or wetland shore filters runoff; a built or cropped shore delivers it.
300 m ring: Tree cover 60% · Grassland 19% · Bare / sparse 11% · Shrubland 6% (ESA WorldCover 2021, land pixels only). · high confidence
- Life
The species record here is thin.
Occurrence counts measure where people have looked as much as what lives here; a thin record is an unknown, not an absence.
6 GBIF occurrence records inside the boundary; most recorded: Peyssonnelia squamaria, Peyssonnelia rubra, Peyssonnelia dubyi. · low confidence
- Climate
Expect the seasons here about 1.4 °C warmer by 2050, with 36% less rain.
Warmer air means warmer, more stratified water and more evaporation; less rain means less inflow. Expect is the honest verb: this is the middle of a range.
CMIP6 (MPI-ESM1-2-XR, SSP5-8.5) 2045–2049 against the 2004–2024 record; longest dry spell expected 131 days. · medium confidence
- The body
100% of the boundary is open water in the land-cover record; the public map does not name it.
An unnamed water is not an unknown one — the archive still says how much of the boundary is water and whether it stays — but its kind, its operator and its rights are yours to establish.
100% open water (ESA WorldCover 2021). · low confidence
- The basin
This water sits at sea level, too shallow for the global grid to give it a depth.
A shelf, a gulf or an estuary shallower than a couple of metres mixes with the wind and the tide and warms fast; the chart, not the satellite, holds its depth.
AWS Terrarium z12 (ETOPO1 below sea level), 62 samples, 1 m of relief across them. Bathymetry is ETOPO1-grade (~1.8 km): a screen, never a chart. · low confidence
What it means together
About 359 mm of rain falls on this water in a year, and the water stays: most of the boundary has held water through four decades of passes.
The shore is 96% natural cover, so what reaches the water is filtered first — and the water reads clear, which says the edge is doing its job.
This body of water is sound water with clear regenerative upside at its edge; the weakest reading is climate resilience, and that is where the leverage is.
What to do first
- 1
Take a baseline in four bottles before anything changes.
Every figure here is read from orbit or the public record; a baseline on the water is what makes the next reading a trend.
On the water · Temperature, dissolved oxygen, pH and conductivity at the surface and one metre down; Secchi depth; one bottle for E. coli. Same three points every time. · first visit
Open questions
- —Who holds rights to this water — to take from it, to discharge to it, to fish it — and who enforces them?
- —What is in the sediment on the bottom — the memory of everything the catchment has sent down?
- —What is the land above doing this year that the satellite has not caught up with yet?
Sources & method
Spain was read from public satellite and open-data records; the sources are named below with their licence and grain. The weights that turn them into the Water Score are not published — the data is public, the lens is the product.
- Place — OpenStreetMap / Nominatim · Nominatim reverse geocodesettlement · live · ODbL 1.0
- Climate — Open-Meteo · Archive 2004–2024 + MPI-ESM1-2-XR to 2050~9 km · 2004–2024 / 2045–2049 · CC-BY 4.0 (data); non-commercial API tier
- Surface water — JRC Global Surface Water · Global Surface Water v1.4 — occurrence & seasonality30 m · 1984–2021 · Copernicus / open (attribution)
- Biodiversity — GBIF · Occurrence records (count + top species)point · live · Mixed CC0 / CC-BY / CC-BY-NC (per dataset)
- Body & shore cover — ESA WorldCover · WorldCover 2021 v200 inside the boundary and in a 300 m shore ring10 m · 2021 · CC-BY 4.0 (commercial promotion: notify due@esa.int)
- Basin — AWS Terrarium (Mapzen) with ETOPO1 bathymetry · Terrarium elevation tiles sampled inside the boundary~10–30 m on land; ~1.8 km below sea level · 2017 (ETOPO1: 2009) · Open (attribution)
- Water optics — Copernicus Sentinel-2 · Scene classification water mask; MNDWI, NDTI (turbidity proxy), NDCI (chlorophyll proxy) over the water pixels of one clear pass10–20 m · live (latest clear scene, ≤ 120 days) · Copernicus Sentinel data — free, full and open
- Surface temperature — Landsat Collection 2 Level-2 · Landsat C2 L2 surface temperature (ST_B10) over the boundary, latest clear scene100 m (resampled to 30 m) · live (≤ 365 days) · US public domain
- Watershed — Global Watersheds (MERIT-Hydro) · Upstream basin + downstream flowpath (screening hydrography)~90 m · MERIT-Hydro 2019 · Open service, no warranty; engine open source (delineator)
- Population — WorldPop · Gridded population 2020 (parcel + 5 km ring sums)~100 m · 2020 · CC-BY 4.0
Read 2026-10-12 03:37 UTC in 11.0 s · lens v1