Resistance and priority analysis of landscape forest fields, lakes, and grass restoration in Dabaoshan mining basin

Following the concept of "source prevention, flow control, and sink control", taking Dabaoshan mining area in nanling, north guangdong as the source of risk and the basin as a research area, the main resistance factors of the area were analyzed and studied. This paper utilized the minimal cumulative resistance(MCR) model to establish the regional ecological resistance surface, analyzed ecological restoration priorities using Jenks natural breakpoint method, and proposes key points and countermeasures for regionalized governance. The results show that the comprehensive resistance coefficient of the study area was between 9 and 32, and the spatial distribution pattern of the resistance surface of each evaluation index was similar, with a large resistance value in the southeast and a small spatial pattern in the northwest. Long-term mining has polluted the ecological environment of the basin, and the closer the mining area, the higher the priority of regional ecological restoration. The study area is divided into four priority areas, and the priority of each area is in turn: Area Ⅰ > Area Ⅱ > Area Ⅲ > Area Ⅳ. Area Ⅰ focuses on water control, increasing pH, reducing the available content of heavy metals, and increasing vegetation coverage. Area Ⅱ focuses on river control and soil control, ensuring a reduction in pollution and enhancing the waste water regulation of sludge reservoirs. Areas Ⅲ and Ⅳ focus on soil control, gradually improving soil conditions. The results provide a scientific basis for the landing and scientific management of restoration projects on spatial and temporal scales.