id	keyword
american_scientific_journal-4391	catchment
american_scientific_journal-4391	rainfall
american_scientific_journal-4391	migina
american_scientific_journal-4391	engineering
american_scientific_journal-4391	evaporation
american_scientific_journal-4391	volume
american_scientific_journal-4391	runoff
american_scientific_journal-4391	technology
american_scientific_journal-4391	rwanda