生态景观视角下土地整治的生态效益评价
鲁胜晗1,2, 朱成立1, 周建新2, 田世超3, 王炎如2, 常 军2

(1.河海大学 农业工程学院, 南京 210098; 2.华东勘测设计研究院, 杭州 311122; 3.河海大学 水文水资源学院, 南京 210098)

土地整治; 生态效益; 层次分析法; BP神经网络; 农业生态; 农业景观

Evaluation on Ecological Benefit of Land Remediation from the Perspective of Ecological and Landscape
LU Shenghan1,2, Zhucheng Li1, ZHOU Jianxin2, TIAN Shichao3, WANG Yanru2, CHANG Jun2

(1.College of Agricultural Engineering, Hohai University, Nanjing 210098, China; 2.East China Institute of Survey and Design, Hangzhou 311122, China; 3.College of Hydrology and Water Resources, Hohai University, Nanjing 210098, China)

land reclamation; agricultural benefit; analytic hierarchy process; back propagation neural network; agricultural ecological; ecological landscape

备注

系统、科学地评价土地整治的生态效益对农业生态保护和农业景观建设有积极影响。在生态景观视角下,结合土地整治的特点及工程实践,采用层次分析法从基本功能、生态功能、景观功能3个方面展开土地整治的生态效益评价体系,并确定了各层次的权重系数。以衢江万亩水田项目及白鹤滩土地整治项目为实例,运用层次分析法得初步评价结果并以此为基础,设计了相应的BP神经网络模型,通过训练和检验使其应用于实例。结果 表明:白鹤滩(云南),白鹤滩(四川),衢江万亩水田项目的 基本、生态、景观功能和生态效益评价值分别为57.73,82.63,85.43; 61.62,57.11,65.08; 40.83,43.29,52.11; 52.92,56.84,64.10。分析可知,无论从整体的生态效益还是从各功能的角度来看,衢江万亩水田项目都相对优于白鹤滩两地。AHP—BP模型结合了主观优选和客观映射的特点,可以对土地整治的生态效益进行系统、科学的评价,评价结果与实际相符,表明该方法可行有效并能为不同区域土地整治的生态效益评价研究提供参考和借鉴。

Systematic and scientific evaluation of the ecological benefits of land remediation has a positive impact on agricultural ecological protection and agricultural landscape construction. From the perspective of ecological landscape, combining with the characteristics of land remediation and engineering practice, analytic hierarchy process is adopted to develop the ecological benefit evaluation system of land remediation from three aspects: basic function, ecological engineering energy and landscape function, and the weight coefficient of each level is determined. Taking the ten thousand mu paddy field in Qujiang and the land reclamation of Baihetan as examples, and based on the preliminary evaluation results obtained by AHP, a back propagation neural network model was designed and applied to the case by training and testing. The results show that the evaluation values of basic, ecological, landscape function and ecological benefits of Baihetan(Yunnan), Baihetan(Sichuan)and Qujiang are 57.73, 82.63 and 85.43; 61.62, 57.11 and 65.08; 40.83, 43.29 and 52.11; 52.92, 56.84 and 64.10, respectively. The analysis shows that Qujiang is superior to Baihetan in terms of overall ecological benefits and functions. The AHP-BP model combines the characteristics of subjective optimization and objective mapping to make a systematic and scientific evaluation of the ecological benefits of land remediation, and the evaluation results are consistent with the actual situation, indicating that the method is feasible and effective and can provide reference for the ecological benefit evaluation of land reclamation in different regions.