Keywords: monitoring land use Substances: 1-Hydroxy-Benzotriazole (ASOKPJOREAFHNY-UHFFFAOYSA-N) 2-6-Dichlorobenzamide (JHSPCUHPSIUQRB-UHFFFAOYSA-N) 2-Amino-4-methoxy-6-methyl-1-3-5 triazine (NXFQWRWXEYTOTK-UHFFFAOYSA-N)