| 摘要 |
<p>Automatic rain gauges (P00-POn) are disposed in the land area (ZT). A meteorological radar (R1) supplies, at a given radar periodicity, a radar image showing rainfall cells affecting the land area. By analysis of the series of radar images, the principal rainfall cells are dynamically monitored with regard to their shape and their movement. Then, a radar rain map is established, by cumulation in each pixel of the land area, of the precipitations due, during a second chosen interval of time, to these principal rainfall cells, with interpolation of their shapes and positions. There is selected at least one sub-system (PA, PB) of four rain gauges, separated from each other by about 2 to 4 kilometres and touched by at least one principal rainfall cell. Finally, the rain map is corrected at least partially as a function of the relationship between the cumulated real rain gauge data and the data of the said map at the locations of the rain gauges of the sub-system. This allows an excellent estimation of precipitations in each square kilometre of the land area. <IMAGE></p> |
