Water Data Explorer

The World Hydrological Observing System (WHOS), operating under the World Meteorological Organization (WMO) Data Policy, serves as a global gateway for the standardized exchange of hydrological, meteorological, and climate-related environmental data. Designed to uphold principles of open access and transparency, WHOS eliminates the need for centralized data storage by dynamically linking users to original data providers—such as national hydrometeorological agencies, research institutions, and monitoring networks—through its advanced Discovery and Access Broker (DAB) technology. This middleware framework harmonizes disparate data formats and protocols (e.g., OGC WaterML 2.0, ISO metadata standards), enabling seamless interoperability across geographic and institutional boundaries. Users gain real-time access to critical datasets, including river discharge, groundwater levels, and precipitation trends, while adhering to strict Terms of Use that prohibit unauthorized commercial exploitation, mandate attribution to source agencies in publications or downstream services, and require acknowledgment of inherent risks (e.g., data latency, sensor inaccuracies).

The WMO explicitly disclaims liability for decisions or damages arising from data use, emphasizing user responsibility to verify data quality and applicability. Terms are subject to change, potentially altering access permissions or usage rights, necessitating regular policy reviews by stakeholders. By prioritizing decentralized governance and FAIR (Findable, Accessible, Interoperable, Reusable) data principles, WHOS empowers global collaboration in addressing water-related challenges, from transboundary basin management to climate adaptation strategies, while safeguarding data sovereignty and intellectual property rights of contributing entities.