【摘要】 黄河下游河道地貌特征是影响河流水动力地质作用和悬河稳定性的主要因素之一,本文首次采用遥感与GIS相结合的方法对黄河下游河道地貌进行了定量的分形分维研究。研究结果表明:①度量尺度由0.1km增大至100km,河床的分形弯曲度随由1.54减小为1.11,且不同河段的分形弯曲度不同;②河床浅滩数量与大小呈单对数线性相关关系,但是由1986年至2000年表现出规律性变化;③悬河的稳定性随不同河段河床分维值D值的增大而降低。更多还原

【Abstract】 The riverway physiognomy is one of the main factors that affect the river dynamical geology action in lower reaches Yellow River.In this paper,the fractal characteristics of the riverway physiognomy are studied in lower Yellow River:by means of remote sensing and GIS.The results show:①The fractal curvature decreases from 154 to 111 while the measurement scale changes from 01km to 100 km,and the fractal curvatures depend on reaches;②The amount of the riverway shallows is relevent to the size of the riverbed shallows,the amount changes linearly with logarithmic changing of the size,and the relationships in different years -1986,1997 and 2000 differ from each other;③The stabilities of the reaches of the aboveground river decrease with an increasing fractal dimension-D.更多还原