id	keyword
esrj-33792	island
esrj-33792	water
esrj-33792	delta
esrj-33792	resistivity
esrj-33792	groundwater
esrj-33792	okavango
esrj-33792	surface
esrj-33792	figure
esrj-33792	salinity
esrj-33792	centre
esrj-33792	botswana
esrj-33792	thata
esrj-33792	borehole
esrj-33792	data
esrj-33792	saline
esrj-33792	imaging