珠江三角洲流域的沙田景观，是岭南传统水乡社会的有机组成部分，深受地理环境和人文精神的影响。进入现代社会后，沙田文化景观日渐萎缩。为揭示珠江三角洲大吉沙岛沙田景观格局的历史演变过程及其人地互动机制，以 1726 年—1950 年的长洲岛地图为数据源，结合田野调研和文献研究等方法分析沙田聚落景观格局的演变特征。研究表明：大吉沙岛作为海口沙洲，其形成经 历了洲体沿水流方向的逐步淤积，沙洲的合并，以及河汊由繁到简的自然过程；大吉沙岛沙田景观格局是自然演变与人为开发互动的结果，包含人为筑堤、临水建筑、沙田生产活动三大特征，呈现“沙坦 - 耕田 - 堤围 - 茅寮”的形态演进规律。

The landscape of sand fields in the Pearl River Delta Basin is an integral part of the traditional water village society in Lingnan, which the geographical environment and humanistic spirit have deeply influenced. After entering modern society, the cultural landscape of sand fields is shrinking day by day. This study aims to reveal the historical evolution process of the landscape pattern of sand fields on Dajisha Island in the Pearl River Delta and its human-land interaction mechanism. The map of Changzhou Island from 1726 to 1950 was used as the data source, and field research and literature study were combined to analyze the evolutionary characteristics of the landscape pattern of sand fields settlement. The study shows that the formation of Dajisha Island as a seaport sandbar went through a natural process of gradual siltation along the direction of the water flow, the merging of sandbars, and the change from a complicated to a simplified river branch. The landscape pattern of sand fields on Dajisha Island is a combination of a long-term natural evolution and anthropogenic development, and it includes three main features: anthropogenic dykes, waterfront buildings, and production activities in sand fields. It also shows the morphological evolution of 'Sand Fields-Cultivated Field-EmbankmentThatched Cottage'.

TU986

广东省哲学社会科学“十四五”规划项目“基于粗糙集理论的五邑传统村落景观基因图谱的构建及特征研究”（编号：GD23YYS17）；广东省社会哲学规划青年课题项目“岭南五邑侨乡传统村落景观基因图谱构建与现代应用研究”（编号：GD22YYS04）