Fig. 5

(a) Map of open dumps registered within different basins of Tucumán (see Fig. 1a for details). Red circles represent the area of each open dump in hectares measured by the UAV. Yellow dots represent the mass in kilotons (1 kt = 1000 tons) and the black triangles show the kilotons per hectare for each open dump. Maps was created using hydrographic layers freely obtained from the National Geographic Institute of Argentina (https://www.ign.gob.ar/NuestrasActividades/InformacionGeoespacial/CapasSIG) and ArcGIS Pro version 3.0.2 (https://www.esri.com/en-us/arcgis/products/arcgis-desktop/overview). (b) Area of the open dumps expressed in hectares (blue bars, with the exact value written above) in relation to total mass of waste (red line, kt) and to the mass per hectare (yellow line, kt ha⁻¹). Numbers on the map and in the X axis refer to the identifier (ID) of each dump. Open dumps shown here are those for which we obtained data using the UAV flights (n = 35) (see Table S1).