Based on the clarification of the character of scale

the spatial and temporal scale of river ecosystem restoration is discussed in detail. The temporal scale includes short

middle

long and bally long scale

the longer is the time required to make river ecosystem get stabilization state

the larger is the selected temporal scale. In restoration practice

river ecosystem restoration commonly focuses on short

middle and long scale. The spatial scale consists of region

watershed

river corridor and river section scale. The focus in region scale is the optimization of socio-economic disturbance sources and the dissipation of disturbance intensity

the integrity of watershed

cumulative impacts

landscape pattern and process

land use and other aspects should be emphasized in watershed scale

the longitudinal

transverse and vertical link should be given special consideration in river corridor scale

and river section is the implementing unit for detailed restoration project and engineering.