The options for water bodies (freshwater) are

G1 Pond (less than 50m2)

G2 Small water-body (50-450m2)

G3 Lake/unlined reservoir

G4 Lined reservoir

G5 Gravel pit, sand pit, etc

G6 Stream (less than 3m wide)

G7 River (more than 3m wide)

G8 Ditch with water (less than 2m wide)

G9 Small canal (2-5m wide)

G10 Large canal (more than 5m wide)

Please note the two digit code preceding the description.