Keywords: monitoring land use Substances: Acetazolamide (BZKPWHYZMXOIDC-UHFFFAOYSA-N) Acesulfame (YGCFIWIQZPHFLU-UHFFFAOYSA-N) 2-Amino-4-methoxy-6-methyl-1-3-5 triazine (NXFQWRWXEYTOTK-UHFFFAOYSA-N)