id	keyword
arees-696	sand
arees-696	botswana
arees-696	water
arees-696	hydraulic
arees-696	river
arees-696	aquifer
arees-696	radar
arees-696	sediments
arees-696	conductivity
arees-696	motloutse
arees-696	figure
arees-696	properties
arees-696	gpr