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.

• 时间上，可分为短、中、长与极长4个尺度，修复对象达到稳定状态所需时间越长，所需选择的时间尺度越大，河流生态系统修复一般关注的是短、中与长3个时间尺度。