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Article Title :

Spatial Interpolations of Annual Rainfall in Ethiopia Using Simple and Universal Kriging Techniques

Hydrospatial Analysis

7 (2023)

1

19-27

Universal Kriging , Simple Kriging , Rainfall , Interpolation , Ethiopia

Crossref citations: 0
Views: 15
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The study of spatial distribution of precipitation is an important aspect of water-related research like, hydrological modeling, disaster prediction and watershed management. But, spatial interpolations of annual average rainfall in Ethiopia using Simple and Universal Kriging type through different models has not yet investigated.  This study was focused on to select the best fit semivarogram model for annual rainfall interpolation and to map the spatial distribution of rainfall of Ethiopia. In this study, long term mean annual rainfall which was collected from 931 meteorological station were interpolated using different mathematical variogram models of Kriging to select the best fit variogram model useful to predict continuous surface values of annual average rainfall in Ethiopia. Spherical model was found to be the best fitted variogram model and most accurate model for interpolation using both Simple and Universal Kriging with the value of ME (0.005), RMSE (1.21) and MSDR (121.32) and ME (0.001), RMSE (0.88) and MSDR (144.11), respectively. Since the kriging results of spherical model indicate good model efficacy for this study, it may be useful to map spatial pattern of annual rainfall in Basin level in Ethiopia.

The distribution of precipitation is an important aspect of water-related research like, hydrological modeling, disaster prediction and watershed management.

This study was focused on to select the best fit semivarogram model for annual rainfall interpolation.

The long term mean annual rainfall collected from 931 meteorological stations were interpolated using different mathematical variogram models of Kriging.

Spherical model was found to be the best fitted variogram model and most accurate model for interpolation using both Simple and Universal Kriging.

7.

Cressie, N., 1991. Statistics for spatial data. John Wiley and Sons, New-York, 900.

13.

Najnin, A., and Sahalu, A. G., 2019. Spatial Pattern Analysis of Precipitation in the north-western part of Ethiopia (Gojjam) by Using Different Interpolation Methods.

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Wackernagel, H., 2004. Geostatistics. Encyclopedia of Statistical Sciences.

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