کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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4526544 | 1323844 | 2009 | 9 صفحه PDF | دانلود رایگان |

The main objective of this paper is to estimate the error in the rainfall derived from a polarimetric X-band radar, by comparison with the corresponding estimate of a rain gauge network. However the present analysis also considers the errors inherent to rain gauge, in particular instrumental and representativeness errors. A special emphasis is addressed to the spatial variability of the rainfall in order to appreciate the representativeness error of the rain gauge with respect to the 1 km square average, typical of the radar derived estimate. For this purpose the spatial correlation function of the rainfall is analyzed.The data set consists of 1-year radar data collected by the X-band polarimetric radar HYDRIX®, located in Beauce region (80 km south of Paris). All data were processed in real time using the ZPHI® algorithm. A dense 25 rain gauge network provided ground comparison data.The various sources of uncertainties (instrumental and representativeness) are then analyzed and quantified for each sensor.
Journal: Advances in Water Resources - Volume 32, Issue 7, July 2009, Pages 1011–1019