What is CHy e-Board?

The CHy e-Board is a virtual space where the Commission for Hydrology (CHy) community posts information of interest.
Appropriate posts for the CHy e-Board will include communications from the President, documents for discussion, announcements of forthcoming meetings etc, related to the work of the Commission for Hydrology. Whenever a particular document so requires, a discussion on “CHy Forum” will be undertaken.

All information is classified in categories, please select a category in the right-hand menu, to display the corresponding information (in brackets you will find the number of announcements posted under each category)

Recent posts

Additional Background on the WMO Hydrological Observing System (WHOS)

On August 31, 2015 there was an e-Board post entitled WMO Hydrological Observing System (WHOS). The posting provided a link to a new CHy website where users can access hydrological data that are made freely and openly available online by National Hydrological Services using a map interface. No explanatory information as to why and how this new website came about was provided, so I thought it appropriate to provide Commission members with some additional background.

In February 2013, just three months after becoming president, I represented CHy at a meeting of the Inter-Commission Group on the WMO Global Observing System (ICG-WIGOS). At that meeting, it became apparent that other groups within WMO had a misperception that WHYCOS was a data repository that could serve as the CHy contribution to WIGOS. After explaining that WHYCOS was a capacity building mechanism, with a goal of building sustainable hydrological databases, I realized that the Commission needed to provide some mechanism to access existing hydrological data within the framework of WIGOS.

At the second meeting of the CHy Advisory Working Group (AWG) in September 2014, I proposed the development of a WMO Hydrological Observing System (WHOS) as a mechanism for fulfilling the Commission’s effort to support WIGOS implementation. The AWG endorsed this proposal and, as part of my report to Congress 17 this past June, I presented the WHOS concept and plan for its development. Congress urged the promotion of WHOS among National Hydrological Services as well as the broader hydrological community.

WHOS is conceived as a portal to facilitate access to already available on-line real-time and historical data, drawing from the water information systems of countries around the world that make their data freely and openly available, including HYCOS projects. It is being developed in two phases in preparation for review and endorsement by CHy-15 in December 2016. The first phase is the establishment of a map interface on the CHy website that links to those NHSs that make their real-time and/or historical stage and discharge data available online. This map interface was implemented online in August 2015, as noted in the August 31 e-Board posting. The second phase is a much more comprehensive undertaking aimed at developing a fully WIS/WIGOS compliant services-oriented framework linking hydrologic data providers and users through a hydrologic information system that enables data registration, data discovery, and data access. A beta version of this capability is being prepared for CHy-15 review and endorsement, with an aim to have an initial implementation of the full capability ready for EC approval in June 2018.

Significantly, the WMO Hydrological Observing System will go a long way to fulfilling the desire of hydrologists and water resources specialists worldwide to have simple access to hydrological data from those National Hydrological Services around the world that make their data freely and openly available. It represents a major CHy achievement and I hope you find it both exciting and useful.

Harry F. Lins,  President, Commission for Hydrology


Posted in Uncategorized | Leave a comment

Vacancy notice for GEMI Global Monitoring Officer

GEMI (Integrated monitoring of water and sanitation related SDG targets) is the inter-agency initiative operating under the UN-Water umbrella and aiming to support Member States and the international community in measuring progress towards the proposed Sustainable Development Goal on Water (SDG 6).

GEMI has opened a vacancy for recruiting a Global Monitoring Officer to lead the GEMI Coordination Team which will provide overall administrative, communications and outreach support and facilitate coordination across all components of GEMI.

More details can be found in

Please note that the recruitment process will be carried out by UNOPS and not by WMO.

Posted in Message from the secretariat | Leave a comment

WMO Hydrological Observing System (WHOS)

whos-screen200x165WHOS is a portal to the online holdings of National Hydrological Services (NHS) around the world that publish their data without restrictions or cost. It represents the hydrological component of the WMO Integrated Global Observing System (WIGOS).

Access to the data comprising WHOS can be obtained via map-based links.

Posted in Message from the secretariat | Leave a comment

Information on progress in preparation of document in the thematic area Water, Climate and Risk Management

Dear colleagues,
The Commission for Hydrology on its 14th session has among other activities asked for:
Preparation of a note/overview guidance material on how to use regional climate modeling (i.e. long-term climate scenarios) in strategic hydrological management
Preparation of a comprehensive report on downscaling approaches for hydrological applications and their associated uncertainties, including commenting on existing case studies

A group of experts met to discuss the document structure and steps in its preparation in Geneva last week. We agreed to prepare document that is intended to support operation and practice of National Hydrological Services (NHSs) and other practitioners in the field of use of outputs of climate models for hydrological applications. As such the main aim of the document is to provide a guidance on the process of design and performance of the climate model outputs use in hydrological applications e.g. climate change impact studies or seasonal hydrological predictions.
Our target user groups are practitioners in the field of hydrology and water management. Therefore the whole document describes and handle various aspect from the perspective of an impact modeler not a climate expert. The climate model outputs are considered as delivered products and inputs to the impact study or hydrological model.

The discussion led to a proposal of following table_of_contents.

You are welcome to comment on the document structure represented by table of contents as soon as possible. You are also welcome to express your interest to contribute to document preparation e.g. By provision of examples of case studies or trough the internal review of selected chapters.

Posted in AWG, CHy 14, Documents under discussion, Water, Climate and Risk Management | Leave a comment

Manuel sur la prévision et l’annonce des crues

1072-f100x141rLe “Manuel sur la prévision et l’annonce des crues” Organisation météorologique mondiale (OMM, No. 1072) est maintenant disponible en français [Téléchager (PDF)]

Posted in Publications | Leave a comment