Variables: dissolved_oygen total_organic_carbon pH Keywords: land use Substances: 1-Propanesulfonate (KCXFHTAICRTXLI-UHFFFAOYSA-N) 18-beta-Glycyrrhetinic acid (MPDGHEJMBKOTSU-YKLVYJNSSA-N) 2-4-D (OVSKIKFHRZPJSS-UHFFFAOYSA-N)