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中文摘要：
基于分形理论和实测流域日径流长序列资料,研究了中尺度流域（武水流域）和小尺度流域（贞福流域和双溪流域）日径流的分形特征.结果表明：相同时间尺度和不同日径流门限值条件下,相同空间尺度流域间和不同空间尺度流域间日径流均具有显著的分形特征,具有自相似性.随着门限值的增大,不同空间尺度流域间日径流的分形盒维数均逐步减小;当时间尺度在120～150d时,不同空间尺度流域日径流的分形维数点集均逐渐趋向饱和,当时间尺度大于该值时,就有出现一定门限值径流的可能性.
英文摘要：
Based on the fractal theory and the long-term daily discharge records,this paper analyzed the fractal characteristics of daily discharge in mid-scale watershed （Wushui watershed） and small-scale watersheds （Zhenfu and Shuangxi watersheds）. Under the same time scales and different threshold values of daily runoff,the fractal characteristics of daily discharge in the watersheds of different spatial scales and of same spatial scales were evident,and existed self-similarity. With the increase of the threshold values of daily runoff,the fractal dimensions of the daily discharge of different space-scale watersheds decreased gradually. The set of fractal dimensions of the daily discharge in different space-scale watersheds tended to be saturated when the time scale was 120-150 days,and the critical threshold values of daily runoff might appear when the time scale exceeded this number of days.
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