|WORLD METEOROLOGICAL ORGANIZATION||
|Explanation of the criteria for classification and numbering of components||
|Explanation of the dates on the component's description|
METHOD OF DETERMINATION OF THE RATING CURVE
1. Purpose and objectives
Development of method and software for determination of rating curve taking into account hydraulic conditions in a river channel.
The manual presents a method for determination of hydraulically reasonable rating curve taking into account the shape of the river channel, resistance to motion and effective gauge height of zero flow. The method is computerised by original RATIC program. It employs the logarithmic scale in accordance with the ISO 1100-2 standard and WMO recommendations (Guide to Hydrological Practices). The method is supplemented with several ways of rating curve extrapolation. Advantages of the method:
Stage, and discharge measurements, water surface slopes, description of conditions decisive to resistance to flow and other gauging station characteristics (metadata).
Rating curves for given gauging station – present and historical in form of charts, tables and graphs.
5. Operational requirements and restrictions
6. Form of presentation
Manual of 76 pages plus computing program, both in English.
7. Operational experience
The method has been used for determination of more than 150 rating curves in various regions of Poland in different types of river channels. Examples of the determined rating curves are presented in the enclosed manual. The method has been accepted as the basic tool in the Polish Hydrological Service and in the System of Hydrology, which is a HOMS component.
8. Originator and technical support
Institute of Meteorology and Water Management (IMGW), Warsaw, Poland.
Relevant training in English and French either in Poland or in the requesting country can be arranged through the IMGW..
Manual and computing program on CD are available free of charge from HNRC for Poland at the Institute of Meteorology and Water Management, ul. Podleśna 61, 01-673 Warszawa, Poland (tel. +48 22 56 94 326, fax +48 22 56 94 317,
10. Conditions on use
Cost of reproduction (if any) and mailing.
|(First entered: MARCH 2010||