Exchange of Data and Information

Exchanging data and information provides that basis by which flood issues can by coordinated within an international watercourse. For instance, the 1997 UN Watercourses Convention includes provisions for the exchange of data and information:

  • “(1) …watercourse States shall on a regular basis exchange readily available data and information on the condition of the watercourse, in particular that of a hydrological, meteorological, hydrogeological and ecological nature and related to the water quality as well as related forecasts.
  • (2) If a watercourse State is requested by another watercourse State to provide data or information that is not readily available, it shall employ its best efforts to comply with the request but may condition its compliance upon payment by the requesting State of the reasonable costs of collecting and, where appropriate, processing such data or information.
  • (3) Watercourse States shall employ their best efforts to collect and, where appropriate, to process data and information in a manner which facilitates its utilization by the other watercourse States to which it is communicated.”

These provisions are essential for several applications in flood management, particularly flood forecasting, the establishment of baseline data for flood frequency analysis, the preparation of flood hazard and risk maps according to agreed joint criteria.


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Figure: WMO