Research on Ecological Restoration Method and Improvement Effect of Northern Jiangsu Canal Based on ENVI+HEC-RAS
In view of the importance of ecological restoration to maintain the healthy life of the river,to improve the vegetation coverage and water quality as the goal,ecological restoration in the Northern Jiangsu Canal was carried out.Based on the Landsat8 remote sensing image data of the study area in 2018,software ENVI was used to analyze the land use in the whole reach of the Northern Jiangsu Canal.The software HEC-RAS was used to simulate the COD water quali-ty index concentration in the section of the New No.1 Water plant in Siyang under the condition that the upstream eco-logical inflow was increased.The results show that the maximum plant coverage in the whole reach of Northern Jiangsu Canal could be increased to 59.84%,and the Kappa coefficients were greater than 0.6,which met the requirements.The concentration of COD water quality index reached the Class Ⅱ water standard in May,October and December,and the class Ⅲ water standard in other months compared with before regulation.It can be seen that the water quality of the canal has been improved under the effect of increasing ecological inflow.
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