近30年来太湖流域湖泊岸线形态动态变化

Dynamic Changes of Lake Shorelines Morphology in the Taihu Basin during the Past 30 Years

湖泊的岸线特征是表征湖泊形态特征的一项重要内容．本文应用分形理论中的计盒维数，基于岸线长度与面积 关系的分形维数及岸线发育系数，对太湖流域主要湖泊的湖泊岸线变化进行了研究．结果表明，分形维数可以更好的对 湖泊岸线进行量化描述，太湖流域主要湖泊的岸线具有自相似性；近30年来，太湖流域湖泊的岸线曲折度降低，岸线长度 减少，岸线结构趋于单调．

The characteristic of lake shoreline is one of morphological features of lakes. Based on the two physical properties of lake, perimeter and area, applying the shoreline development index, the box-dimension and the fractal dimension based on shoreline length-area, the dynamic Changes of the lake shorelines in Taihu Basin are studied. The results show that fractal dimension quantitatively describes the lake shoreline exactly, and the major lake shorelines take on self-similarity. The sinuosity of shorelines and the perimeters reduced, and the structure of the shorelines became monotonous during the past 30 years.