Study on the ecological control line in the major leakage area of Baotu spring in Shandong province, eastern China

Abstract

Delimiting the red line of ecologically functional space is a system innovation in the field of environmental management in China. This study proposes a method to delineate the spatial red line of ecological functions based on the strong leakage area in Jinan. The ecological control line was delineated by comprehensively considering the influence of topographic slope, lithologic characteristics, tectonic development, thickness and permeability of Quaternary strata, and vegetation coverage. And the vector analysis of these indicators was carried out in ArcGIS, the ecological control lines of the main seepage areas were initially determined by spatial superposition of vector data. In addition, the accuracy of the ecological control lines was effectively improved by vegetation cover and Quaternary stratigraphic thickness. Our results show that the major leakage areas, major leakage protection areas, and buffer areas were 299.75 km2, 114.38 km2, and 185.23 km2, respectively. The near-natural, development-construction, and new development-construction leakage areas were 221.43 km2, 60.97 km2, and 17.35 km2, respectively. This study provides support for the restoration of urban natural ecology, highlighting urban characteristics and orderly implementation of urban organic renewal, and it is of great significance to protect the regional ecology and ensure the continuous flow of Baotu Spring.