Association mining of coastline change and land use patterns to enhance conservation

Abstract

Coastal zones, as interfaces between marine and terrestrial ecosystems, possess great ecological and economic value but are environmentally fragile. This research provides a new perspective for studying development and change patterns in coastal zones, offering insights for land planning and contributing to the ecological preservation and sustainable development of coastal areas. We utilized Landsat TM and OLI sensor imagery (from the years 1990, 2000, 2010, and 2020) to extract coastline and land use information from the coastal zone of Shandong Province. Through the establishment of association mining models between coastline changes and land use patterns, the relationships between spatial layout changes and development processes in different geographical locations are revealed. In the initial stage, weak expansion and moderate changes in the coastline corresponded to units with lower land development intensity sequences. In the intermediate stage, with increasing coastline expansion and intense changes, the sequence of land development intensity was extremely strong > strong > moderate > weak from the sea to the land. This type of association was mostly distributed in the Laizhou Bay salt field and coastal port areas and was mostly focused on aquaculture and port trade, causing “strong” and “extremely strong” units of regional land development intensity. In the later stage, as coastline expansion slowed, the use of ports and docks caused the development intensity of the surrounding land to fluctuate. Farming, fishing, salt field and port construction in the coastal zone of Shandong Province were the major forms of land expansion and change. The association rules between coastline expansion or erosion and coastal development intensity revealed the impact of coastline changes on the spatial pattern from sea to land, which is important for planning layouts, optimizing industrial structures, and maximizing socioeconomic and environmental benefits in coastal areas.