乡镇驻地空间演变研究——以宿迁市泗洪县为例

Study on Spatial Evolution of Town Seats—A Case Study of Sihong County, Suqian City

摘要: 本研究以江苏省泗洪县11个建制镇为对象，探讨水网平原生态约束下小城镇空间形态演变规律。基于2007~2022年四期遥感影像，运用用地拓展强度、形状率、紧凑度等指标，系统分析城镇空间演化特征。结果表明，县域城镇沿交通轴拓展、中心极化、边缘分化；青阳镇建成区占比近半，滨湖镇受生态红线限制呈收缩或停滞状态。生态约束形成“受限但集约”的发展模式，滨湖镇紧凑度更高，交通驱动城镇出现明显带状畸变。三类驱动机制差异显著：交通轴城镇紧凑度下降，产业驱动城镇蔓延扩张，生态约束城镇被动功能重组。针对空间失衡、形态畸变、动力不足等问题，提出分类调控与县域协同优化策略。

Abstract: This study takes 11 towns in Sihong County, Jiangsu Province as examples to explore the spatial evolution of small towns under ecological constraints in water-network plain areas. Using four periods of remote sensing images (2007~2022) and quantitative indicators such as expansion intensity, shape ratio and compactness, it systematically analyzes their spatial characteristics. Results show that Sihong’s towns expand along traffic axes, with central polarization and peripheral differentiation. Qingyang Town accounts for nearly half of the built-up area, while lakeside towns shrink or stagnate due to ecological red lines. Ecological constraints form a restricted but intensive development pattern: lakeside towns have higher compactness, and traffic-oriented towns show serious ribbon distortion. Three driving mechanisms differ: traffic-axis towns lose compactness, industry-driven towns sprawl, and ecologically constrained towns undergo passive functional restructuring. Finally, classified regulation and county-level coordination strategies are proposed to solve spatial imbalance, morphological distortion and insufficient momentum.