Spatial variability and interpolation of daily precipitation amount |
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| Authors: | E G Beek A Stein L L F Janssen |
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| Institution: | (1) Dept. of Surveying and Remote Sensing, Wageningen Agricultural University, P.O. Box 125, 6700 AC Wageningen, The Netherlands;(2) Dept. Soil Science and Geology, Wageningen Agricultural University, P.O. Box 37, 6700 AA Wageningen, The Netherlands;(3) The Winand Staring Centre for Integrated Land, Soil and Water Research, P.O. Box 125, 6700 AC Wageningen, The Netherlands |
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| Abstract: | Daily precipitation amounts show spatial variation over sub-continential regions. Point measurements, representative for regions of land, have to be interpolated towards unobserved locations. In this study four days in 1984 were selected to investigate the spatial variability of daily precipitation amount in North-western Europe in relation to the meteorological conditions. Data were interpolated using Kriging. Crossvalidation was used to compare interpolated values with measured values. Large differences in the spatial structure of daily precipitation amount are obsered as a result of different meterological conditions. Stratification of the study area into a coastal, a mountainous and an interior stratum proved to be successful, reducing the Mean Squared Error of Prediction with up to 55%. |
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| Keywords: | geostatistics precipitation water balance models semivariogram kriging spatial variation |
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