Mostra i rifiuti plastici mal gestiti (MPW) trasportati dai fiumi verso l'oceano, espressi in chilogrammi all'anno. Il livello si basa sul dataset WRI Resource Watch wat.063 (Meijer et al. 2021), un insieme globale di circa 40.000 punti alle foci fluviali, originariamente pubblicato tramite l'API SQL CartoDB di WRI Resource Watch e pre-scaricato in uno snapshot GeoParquet su S3 da cui il livello legge i dati. Ogni punto rappresenta l'emissione annua stimata di plastica alla foce di un fiume: valori più alti indicano fiumi che riversano più plastica in mare. Poiché il dato riguarda solo le foci, la maggior parte delle aree interne o non costiere non presenta elementi.
This layer displays mismanaged plastic waste (MPW) discharged by rivers into the ocean, in kilograms per year. It uses the WRI Resource Watch dataset wat.063 from Meijer et al. (2021), which models global riverine plastic emissions and finds that more than 1,000 rivers account for about 80% of the total. The dataset is a point layer of roughly 40,000 river mouths, each carrying an estimated annual MPW value.
| Code | Provider | Resolution | Year |
|---|---|---|---|
| WRD_AQDCT_99 | WRI Resource Watch | Point (river mouths) | 2021 |
For the area of interest a large 25 km buffer is applied to capture nearby river mouths. The point features are read from a pre-downloaded S3 GeoParquet snapshot (s3://3bee-maps-source-data/wat_063_plasticriverinputs/data.parquet), which is refreshed offline from the WRI Resource Watch CartoDB SQL API (table wat_063_plasticriverinputs at https://wri-rw.carto.com/api/v2/sql), then filtered by bounding box. Each retrieved point is buffered by about 500 m for visibility, then rasterized and classified into five discrete MPW classes (kg/year): Very Low (<100), Low (100-1K), Medium (1K-10K), High (10K-100K) and Very High (>100K). Areas with no river mouths return an empty layer.