id	keyword
esrj-34048	groundwater
esrj-34048	tds
esrj-34048	quality
esrj-34048	area
esrj-34048	fig
esrj-34048	study
esrj-34048	ca2
esrj-34048	samples
esrj-34048	china
esrj-34048	dissolution
esrj-34048	river
esrj-34048	na+
esrj-34048	irrigation
esrj-34048	hco3
esrj-34048	water quality
esrj-34048	plain
esrj-34048	yellow
esrj-34048	aquifer