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Bayesian networks precipitation model based on hidden Markov analysis and its application. (English) Zbl 1383.86002

Summary: Surface precipitation estimation is very important in hydrologic forecast. To account for the influence of the neighbors on the precipitation of an arbitrary grid in the network, Bayesian networks and Markov random field were adopted to estimate surface precipitation. Spherical coordinates and the expectation-maximization (EM) algorithm were used for region interpolation, and for estimation of the precipitation of arbitrary point in the region. Surface precipitation estimation of seven precipitation stations in Qinghai Lake region was performed. By comparing with other surface precipitation methods such as Thiessen polygon method, distance weighted mean method and arithmetic mean method, it is shown that the proposed method can judge the relationship of precipitation among different points in the area under complicated circumstances and the simulation results are more accurate and rational.

MSC:

86A05 Hydrology, hydrography, oceanography
62P30 Applications of statistics in engineering and industry; control charts

Software:

GMRFLib
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Full Text: DOI

References:

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