Despite the wide availability of complex hydrologic observations, our understanding of many hydrologic processes remains incomplete due to the limited amount of information that can be gleaned from traditional data sources. In contrast, naturally-occurringDNAconstitutes a novel type of ecohydrologic observation comprised of many thousands of features reflecting taxonomically and functionally diverse micro-and macro-organisms and processes. As applications of various types of genetic data, including amplicon sequencing and environmental DNA (eDNA) metagenomics and multiomics, gain traction across research disciplines, the utility of these data in hydrologic studies is just beginning to be investigated. This session will focus on DNA informed hydrology and explore the ways in which genetic data can be leveraged to contribute to hydrologic knowledge, either by complementing existing methods or with new and innovative approaches.

• B - Biogeosciences