9ºA Escola Básica Nun'Álvares

25 January 2023

Rio Tejo

Praia Fluvial do Seixal

Location coordinates: 38.6449722 -9.1033611

Group A

Average waste per m² in all riverside zones

3.83

Foreshore (Average waste per m²)

2.79

Backshore (Average waste per m²)

3.86

Riverbank crown (Average waste per m²)

4.86

Group B

Total number of waste items found (including single-use plastic)

165

Weight of all waste including plastic in kg

5.5

Group C

Flow velocity of the river (meters per second)

0.07

River width in m

200

Total number of floating waste

0

Larger Microplastics per 1,000 liters of river water

-

Larger Microplastics per m² of the riverbank

125