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Hydrologic information is generated and published by many government, research, commercial and citizen groups around the world. The formats and protocols used to share the data are heterogeneous, with little agreement about semantics of hydrologic measurements, description of hydrologic features, or metadata content. A broad consensus on hydrologic data sharing formats is needed to ensure that the information can be reliably discovered, interpreted, accessed and integrated. This has been the focus of the Hydrology Domain Working Group (Hydro DWG), established in 2009 as a joint working group of the World Meteorological Organisation (WMO) and the Open Geospatial Consortium (OGC). It consists of members from government, research and the commercial sectors and it plays an important role by bringing together organisations to agree on ways to improve our ability to share water information. In Sept. 2012 the OGC adopted ”WaterML2.0 Part 1: Time series” as an OGC Standard. At its 14th Session in Nov. 2012 the WMO Commission for Hydrology adopted a resolution that starts a process to register this standard as a joint WMO/ISO standard. WaterML2.0 is the first international standard for encoding water observation time series, developed by the Hydro DWG and the WaterML2.0 Standards Working Group after several years of specification work and interoperability experiments. Built on widely used OGC and ISO standards, it represents a breakthrough for linking local to global water information sources into large water information networks and enabling efficient analysis and modelling of water data across information sources. WaterML2.0 Part 1 is the first in a series of planned enhancements and extensions. Current work involves standardised communication of descriptions of surface and groundwater features, ratings and gaugings, river cross sections and water quality. It also contributed to the development of a hydrology domain feature model and hydrology vocabularies, which are essential for interoperability.


Session R02, Semantic Integration in Water Resources



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