IKTA-2000

Determination of object-subsequential area precipitation with radar creation of precipitation-runoff model

A The experimental area: valley of river Körös, south-east of Hungary.

The origin of the problem:
highly flood dangerous area, the run-off time is very short, often 6-12 hours.

 
(Körös valley, 1981.)

The water catcher area is situated in 2 countries: Hungary and Romania. The number of the gauges are very few, first of all on the Romanian side. The periodicity of the report (out of standby) are 12-24 hour. 

The only solution is the usage of remote sensing methods: meteorological radar and satellite. For quantitative purposes only the radar.

At the KÖVÍZIG (Körös Valley District Water Authority) there are (in a off-line operation) WEFAX satellite and digitised radar systems.

The main goal is evaluating of a method for issuing flood warnings with an acceptable accuracy, in night time in automatic regime. From informatics side should be developed a hardware-software system for complex processing of radar, satellite and surface observation data, partly in automatic regime. From hydrological side are necessary the high resolution precipitation amount maps based on few surface observations, and the prediction of dangerous flood situations based on these maps and run-off models.

Dataflow of the information system of KÖVÍZIG

The usual radar calibration methods in these circumstances can give a limited accuracy. The solution is: raising the intelligence level of the processing system. The precipitation is regarded as a result of precipitation object, characterized by several physical parameters. By the aid of the object the characterisation of the precipitation process is much better. The main targets are: objects identification, parameterisation and calibration.
 

In the research after a significant development of the previous hardware-software system, we had an intensive observation and data collection period from 01. 12. 2000. to 30. 11. 2001. In this period all of possible radar, satellite and surface observed data were collected in a database and were archived. The development and testing of the methods are based on that.

For the developing of the object processing, an interactive image processing system were evaluated. All of the data are displayed in the same geographical projections in movie loops for the processing. The categories and the parameters of the objects are evaluated step by step during the research.

The generated precipitation maps (with the resolution of 1 km) are the input of the run-off models.

The project is at 75% of its total duration time.
Project holder is a consort of ICI Interactive Inc., Budapest and KÖVÍZIG, Gyula.