Telmatology
Telmatology is a branch of physical geography concerned with the study of wetlands , such as marshes or swamps . 
<triplet> Telmatology <subj> physical geography <obj> subclass of <subj> wetlands <obj> studies <triplet> marshes <subj> wetlands <obj> subclass of <triplet> swamps <subj> wetlands <obj> subclass of