ASSESSMENT OF THE IMPACT OF TERRITORY-WIDE COMPREHENSIVE LAND REMEDIATION ON THE VALUE OF ECOSYSTEM SERVICES: A CASE STUDY OF NINGBO, CHINA

Territory-wide Comprehensive Land Remediation is a new path to promote ecological security and an innovative project to promote high-quality development and common prosperity in China.The study on the impacts of remediation and ecosystems is an exploration to test the effectiveness of the demonstration project.Taking Ningbo in Zhejiang Province as the research area, we constructed an equivalent factor modification model, proposed an ecosystem service value (ESV) accounting method based on the modified equivalent factor table, and measured the ESV of Ningbo and the remediation area.The conclusions are as follows: (1) the ESV shows an increasing trend before and after remediation: the total value of ESV before remediation is 93.923 billion yuan, and the total value of ESV after remediation is 97.119 billion yuan; (2) the ESV of Ningbo shows geographic differentiation, with the low-value areas concentrated in the northeast and the high-value areas concentrated in Fenghua, Ninghai and Xiangshan.(3) the ESV shows significant differences among remediation areas, with notable growth in Zhouxiang Area and Hengjie Area, while a decreasing trend in seven areas, including the Huanghu Area.The research is highly valuable for quantifying the ecological effectiveness of comprehensive remediation of territorial space and optimizing the arrangement of remediation projects.