Using random forest algorithm to classify the land use status of the watershed where Wusong River(Jiangsu section)remediation project was located,and employing InVEST model to ecological impact assessment of the water conservancy project,an assessment model was quickly established with only a small amount of data,and the changes of ecological environment before and after construction could be intuitively and accurately obtained,so as to achieve habitat quality assessment.The results showed that the overall accuracy of land use clas-sification in the study area reached 93.25％,with a Kappa coefficient of 91.81％.The highest habitat quality in-dex in the study area before construction was 0.76,which was located in the center of Dushu Lake.The aver-age habitat quality index was 0.100,indicating that the overall habitat quality was low.After completion,the aver-age habitat quality index was 0.098,which decreased by 0.002 compared with before construction,and the de-crease rate was 2.00％.Engineer construction could lead to a decline in habitat quality and an incr-ease in habitat degradation.In order to ensure that the habitat quality reduction would not be reduced,ecological compensation should be carried out.
关键词
生境质量/InVEST模型/随机森林/土地利用/水利工程/吴淞江
Key words
Habitat quality/InVEST model/Random forests/Land use/Hydraulic engineering/Wusong River
维普
万方数据