Application of hourly radar-gauge merging method for quantitative precipitation estimates

3rd International Seminar On Sciences "Sciences On Precision And Sustainable Agriculture"

Wardhana, A.^1 ; Pawitan, H.^2 ; Dasanto, B.D.^2

Postgraduate Stud. at Bogor Agricultural University, Indonesia^1

Department of Geophysics and Meteorology, Bogor Agricultural University, Indonesia^2

关键词: Correction method;    Gauge measurements;    Hydrological modelling;    Multiplicative errors;    Precipitation estimation;    Quantitative precipitation estimation;    Spatial and temporal resolutions;    tatic adjustment;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/58/1/012033/pdf
DOI  :  10.1088/1755-1315/58/1/012033

来源: IOP

【 摘 要 】

Gridded quantitative precipitation estimation (QPE) of high spatial and temporal resolution is now being increasingly used for instance for hydrological modelling. The combination between observations from radar data and in-situ rain-gauge measurement is a popular mean to produce QPEs. Since the QPE generated from radar data only is considered to be not satisfactory, some corrections should be introduced in order to achieve better accuracy of the instant precipitation estimation. The correction method that were used were Mean Field Bias Correction (MFB) and static adjustment. MFB was applied by the assumption that the radar estimation was affected by uniform multiplicative error. The static adjustment was applied to correct radar rainfall data through plotting between radar rainfall and rain gauge so that the regression line between radar and rain gauge was approaching one. The purpose of radar QPE corrections was for hydrological modelling applications.