Reservoir in China
GDW 4806
- Identifier
- GDW 4806
- Registered area
- 4.183 km²
- Registered capacity
- 100 million m³
- Outline
- Global Dam Watch
Water level today
The satellite measures the height of the water surface above sea level. Every figure carries how old it is, because the age of a level is that level’s error.
The product states no level for this reservoir. The product declines to state a level here. The satellite measured this reservoir, but its confidence in the series is below the floor the product publishes at, so it says nothing rather than something it cannot stand behind. The confidence figure is that judgement rather than a separate opinion, and everything computed from a level is empty for the same reason.
not stated
not stated
42 of 100
Where the level is heading
No forecast is published for this reservoir, and the reason is stated rather than left as a gap.
The product states no level at this reservoir, so it states no forecast either.
How this record was made
Every number on this page was computed once, under a frozen specification, from the sources listed here. The page computes nothing.
- Validation
- Checked against held-out gauges in this reservoir’s own climate and size group.
- Continuity
- No nadir track crosses it, so without SWOT only the surface area survives, not the level.
- If SWOT stops
- No Sentinel-3 or Sentinel-6 track crosses this reservoir. Without SWOT only the water area survives; no elevation series continues.
- Input tier
- universal
- Specification
- 2026.09.d
- SWOT product version
- D
- Computed
- 2026-09-21T08:47:45.101475Z
- Ages computed at
- 2026-09-22T21:57:00.461338Z
- Next pass expected
- 2026-09-10
Sources
- SWOT L2 HR LakeSP, LakeSP prior, RiverSP, PIXC, PIXCVec, NASA Earth science data policy: CC0 unless marked otherwise; commercial use and redistribution permitted
- Hydrocron (PO.DAAC time-series API over SWOT products), NASA Earth science data policy, as the products it serves; no terms, rate limits or bulk restrictions stated
- ICESat-2 ATL13 V007 (NSIDC), NASA Earth science data policy, CC0
- Global Dam Watch v1.0, CC BY 4.0
- SWOT Prior Lake Database v2.02, ETALAB 2.0 (Licence Ouverte): commercial use with attribution
- SWORD v17c, CC BY 4.0
- Hydroweb lakes and rivers, ETALAB 2.0
- Copernicus Sentinel data: Sentinel-1, 2, 3, 6 level-1 and level-2 files, EU Legal Notice on the use of Copernicus Sentinel Data and Service Information: free, full and open; no commercial restriction
- Copernicus Data Space Ecosystem: OData catalogue, download and identity endpoints, Sentinel data routes to the EU Legal Notice; catalogue search and file download only
- JRC Global Surface Water, Produced under the Copernicus Programme; provided free of charge, without restriction of use
- Köppen-Geiger 1 km climate classification, CC BY 4.0
- Chronos-2 (Amazon), Apache 2.0
The rest of the record
The observation series behind this level, every version this record has been served as, and the nadir series that continues it are served with a key.