id	keyword
american_scientific_journal-1199	flow
american_scientific_journal-1199	stream
american_scientific_journal-1199	catchment
american_scientific_journal-1199	water
american_scientific_journal-1199	duration
american_scientific_journal-1199	curve
american_scientific_journal-1199	period
american_scientific_journal-1199	climate
american_scientific_journal-1199	engineering
american_scientific_journal-1199	changes
american_scientific_journal-1199	research
american_scientific_journal-1199	rainfall
american_scientific_journal-1199	frequency