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hydrologists
hydrogeological
archaeological dig
hydrogeology
shrimp survey
streambed
macroinvertebrates
water sampling point
trout breeding
hydrogeologist
goldminer
mudflow
excavating
oystering
clamming
gold mining
hydrologist
bioprospecting
potamogeton
excavation work
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archaeological dig
hydrogeological
hydrologists
hydrogeology
macroinvertebrates
hydrogeologist
shrimp survey
water sampling point
mudflow
excavation work
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water sampling point
hydrologists
shrimp survey
seining
people fishing
macroinvertebrates
hydrologist
conowingo
riverman
shellfishing
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the water shed
outfalls
entrenches
undergrounds
water spring
underpasses
water channel
temazcal
mud wall
acequia
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mudflat
bioremediation
shrimp survey
mudflow
hydrologists
biosolids
tailings
macrophytes
hydrogeology
mudflats
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water spring
pigeon spring
mountain spring
source de la sorgue
crescent spring
waterholes
jordan river
water hole
mikveh
hydrologists
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tuatara
archaeological dig
mud wall
mudflow
palaeobiology
mudlark
roman excavation
fossil beds
rock balancing
palaeontologist
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hydrologists
seining
trout breeding
macroinvertebrates
flyfishers
water sampling point
jordan river
fishermens
fishing classes
washerwomen
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water sampling point
macroinvertebrates
limnology
hydrogeology
hydrologists
envirothon
bioprospecting
woman at the well
aquiculture
hydrobiology
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gold mining
hydrologists
gangotri
goldmining
goldminer
karez
hydrogeology
geologists
ramganga
guatemalans
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archaeological dig
excavation work
excavating
excavation site
underground cables
excavation
digging equipment
geotechnical
roman excavation
excavations
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macroinvertebrates
river crayfish
trout breeding
steppingstones
shrimp survey
hydrologists
streambeds
mountain spring
bioprospecting
hydrogeological
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macroinvertebrates
trout breeding
hydrologists
seining
alewives
aquiculture
ichthyologists
pigeon spring
envirothon
lampreys
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geocachers
herpetologists
ecologists
foragers
hydrologists
macrophytes
naturalists
botanists
limnology
pond plants
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water well
groundwater
water sampling point
borehole
fetching water
boreholes
hydrogeology
hydrologists
woman at the well
mondulkiri
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crabbing
archaeological dig
shrimp fishing
shrimp survey
clamming
fishing classes
macroinvertebrates
red cliff crab
oystering
crawdads
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seining
clamming
washerwomen
rockpool
shrimp survey
scalloping
stromatolites
marine scientists
woman at the well
tidepools
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seining
hydrologist
mudflow
mudflows
shrimp survey
fording
water sampling point
the roots of the mangrove trees
the brook
kinabatangan
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macroinvertebrates
seining
hydrologists
water sampling point
trout breeding
mountain spring
limnology
hydrogeology
glaciologists
mountain stream
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woman at the well
azolla
shrimp survey
female worker
girl picking flowers
streambeds
picking vegetables in early spring
macrophytes
mountain spring
fetching water
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bioremediation
macrophytes
periphyton
mudflow
hawaii doctor fish
clamming
the roots of the mangrove trees
mudbath
rubber boots
bioprospecting