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中文摘要：
本文将云模型引入到降雨量时空分布特性的研究中,并对广东省东江流域内57个站点1956-2000年降雨量在时间和空间分布上的特性进行了研究.结果表明:该流域降雨量在汛期的降雨最为稳定,枯季次之,而年降雨量的稳定性最小;降雨量在空间上的分布比时间上分布较为离散、较为不稳定,在此期间空间分布则离散度逐渐减少,而稳定性逐渐增强;基于云模型的降雨时空分布特性分析是有效的,可直观地研究降雨量在时空上的变化特点.
英文摘要：
The cloud model was introduced to study the spatial-temporal precipitation distribution. The concept of cloud was explained and the algorithms for cloud generator and backward cloud generator were given. The model was applied to analyze the spatial-temporal precipitation distribution of the Dongjiang river basin according to the observation data of 57 hydrological stations from 1956 to 2000. The analysis result shows that the stability of precipitation is best in flood season and is less in dry season. The stability of annual precipitation is the worst. The spatial distribution is more dispersive and unstable than the temporal distribution but the dispersion tends to decrease and stability tends to elevate in this period. It is concluded that the cloud model is effective and capable of directly analyzing the characteristics of precipitation distribution.
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