南京大学学报(自然科学版) ›› 2015, Vol. 51 ›› Issue (6): 1279–1290.
• • 上一篇
杨晨1,2，张幼宽1，梁修雨1,2
Chen Yang1,2, You-Kuan Zhang1, Xiuyu Liang1,2*
摘要： 通过分析非饱和-饱和系统（USS）中压力水头的时空变化，定量刻画了USS对水流波动的阻尼作用及地表入渗的时间尺度性指数（β）对该作用的影响。结果显示，USS对其中的水流具有阻尼/滤波作用，过滤掉水流的短期波动，使其波动减弱、短期相关性增强；阻尼作用随深度增加逐渐减弱，可能与土壤含水率有关；阻尼作用随入渗序列β值的增大而减弱；分数高斯噪声入渗引起的水头波动起初为非平稳波动最终为平稳波动，β越大，非平稳阶段越长；分数布朗运动入渗引起的水头波动为非平稳波动，β越大，非平稳性越强；入渗的时间分形性是引起地下水位分形波动的重要因素。
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