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Comparison of Spatial Interpolation Methods of Precipitation Data in Central Macedonia, Greece

Computational Water, Energy, and Environmental Engineering 2024年第1期13卷 13-37页

作者： athanasios k. margaritidis Faculty of Agriculture Forestry and Natural Environment School of Agriculture Department of Hydraulics Soil Science & Agriculture Engineering Thessaloniki Greece

The purpose of this paper is to investigate the spatial interpolation of rainfall variability with deterministic and geostatic inspections in the Prefecture of k.lk.s (Greece). The precipitation data where recorded from 12 meteorological stations in the Prefecture of k.lk.s for 36 hydrological years (1973-2008). The cumulative monthly values of rainfall were studied on an annual and seasonal basis as well as during the arid-dry season. In the deterministic tests, the I.D.W. and R.B.F. check. were inspected, while in the geostatic tests, Ordinary k.iging and Universal k.iging respectively. The selection of the optimum method was made based on the least Root Mean Square Error (R.M.S.E.), as well as on the Mean Error (M.E.), as assessed by the cross validation analysis. The geostatical k.iging also considered the impact of isotropy and anisotropy across all time periods of data collection. Moreover, for Universal k.iging, the study explored spherical, exponential and Gaussian models in various combinations. Geostatistical techniques consistently demonstrated greater reliability than deterministic techniques across all time periods of data collection. Specifically, during the annual period, anisotropy was the prevailing characteristic in geostatistical techniques. Moreover, the results for the irrigation and seasonal periods were generally comparable, with few exceptions where isotropic methods yielded lower (R.M.S.E.) in some seasonal observations.

关键词： Interpolation k.iging I.D.W. Precipitation Greece

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Site and Regional Trend Analysis of Precipitation in Central Macedonia, Greece

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Computational Water, Energy, and Environmental Engineering 2021年第2期10卷 49-70页

作者： athanasios k. margaritidis Faculty of Agriculture Forestry and Natural Environment School of Agriculture Department of Hydraulics Soil Science & Agriculture Engineering Thessaloniki Greece

The purpose of this paper is to investigate the trend of precipitation in k.lk.s region (Greece) at the site and regional level in various time scales. At the site level, the precipitation trend was analyzed using three tests: 1) Mann-Kendall, 2) Sen’s T and 3) Spearman while the trend slope was estimated using the Sen’s estimator. At a regional level, nonparametric spatial tests such as Regional Average Mann-k.ndall (RAMk. and BECD’s (Bootstrap Empirical Cumulative Distributions) were elaborated with and without the effect of cross correlation. The trend of precipitation was noticed generally downward at annual time scale and statistically significant at 5% level of significance only in only one station. The results of the analysis of t

关键词： Sen’s T Test Bootstrap Test Precipitation Trend Analysis Greece

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