MOXXI 2019 International Conference will be hosted at New York University (Kimmel Center, 60 Washington Sq. South Suite 605, New York, NY 10012) from March 11th to 13th in collaboration with the Citizen AND Hydrology (CandHy) working group of IAHS, the World Meteorological Organization (WMO) HydroHub, and the Consortium of Universities for the Advancement of Hydrologic Science, Inc. (CUAHSI). The conference aims to bring together different researchers, users, and instrumentation developers to discuss how to overcome the barriers to the advancement of hydrological observations and to the operationalization of innovative hydrometric technologies and monitoring approaches.