Spatial and Temporal Variation of Rainfall in the Hailar River Basin Based on Geostatistics Theory
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Abstract:
The geostatistics theory was introduced into the research field of hydrology and water resources and combined with random function theory to determine the experimental variation function of annual precipitation in the Hailar River Basin based on the measured annual precipitation data at a few stations. Then, the structural function of geometric anisotropy of hydrological variables was obtained by selecting, merging, and fitting the experimental variation functions in different directions. The theory of spatial estimation with anisotropy and universal kriging of multiple time periods was applied to achieve the analysis and calculation of average annual precipitation at an arbitrary point in space and in a basin with various scales. Finally, the advancement, convenience, and accuracy of the theory and method used in the paper were confirmed through the comparison of the results determined by the method of arithmetic average, inverse distance method, and Thiessen Polygon method.
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