Variables: dissolved_oygen dissolved_organic_carbon total_organic_carbon electric_conductivity Keywords: monitoring land use Substances: 1-3-Dimethyl-2-imidazolidinon (CYSGHNMQYZDMIA-UHFFFAOYSA-N) 3-5-dibromo-4-hydroxybenzoic acid (PHWAJJWKNLWZGJ-UHFFFAOYSA-N)