신안군 장도 산지습지의 습지 경계 추출 및 퇴적환경 특성 연구

Abstract

In this study, multi-temporal aerial images were used to compare and analyze changes in wetland area by time series, and wetland boundaries were extracted through GIS spatial data analysis. In addition, the sedimentary environment was analyzed through grain size analysis and chemical analysis of surface sediments. Analysis of aerial imagery showed that abandoned paddy wetlands were formed when cultivation ceased, and that drying out has accelerated in recent years. Analysis of GIS spatial data indicated that the wetland boundary has moved to the upper area, and the overall area has increased due to the inclusion of the lower valley and abandoned paddy area. As a result of the analysis of surface sediments, the sedimentary facies of ‘silty sand (zS)’ and ‘sandy silt (sZ)’ were distributed, with the central part of the wetland maintaining a stable environment, while the upper gentle slope showed a high sand content due to the influx of weathered bedrock. The soil physical and chemical characteristics overall exhibit strong acidity to weak acidity, and due to the high organic matter content and appropriate cation exchange capacity (CEC), it was confirmed that an environment favorable for wetland vegetation growth is being maintained. The results of this study are expected to serve as a basis for future wetland protection and management plans.