Countries and basin organizations willing to develop their hydrological monitoring capacities can benefit from the support of WMO through the World Hydrological Cycle Observing System (WHYCOS) and its HYCOS projects. WHYCOS is a framework programme dedicated to strengthening hydrological observation activities, reinforcing international cooperation and promoting the free exchange of data in the field of hydrology. In 25 years, 12 projects were developed and around 500 measuring stations were installed. Yet, a new momentum is required to enhance the effectiveness of the HYCOS projects and ensure sustainability of the achievements. Accordingly, WMO launched in 2017 the Global Hydrometry Support Facility with the initial support of the Swiss government. Better known as the HydroHub, this facility aims to improve the full value chain from data collection to hydrological services through:
•	Building on the WHYCOS experience to develop an efficient, innovative and sustainable framework to support operational systems in hydrometry in the world; 
•		Facilitating the operational uptake of innovative technologies by national services, including new technology, citizen science, better use of satellite products, low-cost devices, and information systems;
•	Fostering the creation of a community of practice for operational hydrology to enhance information sharing and knowledge exchange;
•	Promoting free and open data sharing with many stakeholders across communities;
•	Bringing together actors from academia, public and private sectors to build benefit-sharing partnerships.
Hydrological data sharing will be facilitated through the development of WHOS Phase II, the new WMO Hydrological Observing System that aims to make hydrological data easily discoverable and accessible worldwide.
The WHYCOS framework aims to improve the efficiency and sustainability of the monitoring framework through:
•	Better connection between data providers and all kinds of users, including political.
•	Development of hydrological data services and products.
•	A combination of different monitoring approaches and integration of data from different providers.
•	Reinforced dedicated training and capacity building, including assessment of institutional and legal status of data provider organizations.
•	A new financial model for HYCOS projects, including long-term maintenance and operation of stations.
•	A reinforced open data policy.