Base layers
DEM
Rivers
Places
Counties
Year 2002
Channel sediment
AS
PB
CD
ZN
ZN
Catchment
AS
PB
CD
ZN
ZN
Mine waste
AS
PB
CD
ZN
ZN
River water
AS
PB
CD
ZN
ZN
Year 2003
Channel sediment
AS
PB
CD
ZN
ZN
Catchment
AS
PB
CD
ZN
ZN
Mine waste
AS
PB
CD
ZN
ZN
River water
AS
PB
CD
ZN
ZN
Year 2004
Channel sediment
AS
PB
CD
ZN
ZN
Catchment
AS
PB
CD
ZN
ZN
Mine waste
AS
PB
CD
ZN
ZN
River water
AS
PB
CD
ZN
ZN
