L1 /
9
CH3041
FIELD TESTING
Landscape
characteristics:
• Potential
ASS : waterlogged soils, shell,
soft-grey-green muds or dark-grey sands.
soft-grey-green muds or dark-grey sands.
• Actual ASS : iron oxide mottling, jarositic
horizons (yellow mineral, KFe 3(SO4)2(OH)6).
horizons (yellow mineral, KFe 3(SO4)2(OH)6).
• Surface
water
: milky green or extremely
clear (Al flocculating reagent) drain water.
clear (Al flocculating reagent) drain water.
• Bioindicators eg. Mangroves; swamp-
tolerant vegetation eg. reeds, paperbark.
tolerant vegetation eg. reeds, paperbark.
• Smell: sulphurous smell after rain is an
indication of an ASS environment.
indication of an ASS environment.
• These
characteristics guide the sampling.
