3.1 AHP model
Based on the composition of the water system, we constructed an index
system including boundary, flow and sediment (Fig. 2a, Table 1), which
can reflect the fluidity and stability of the boundary, the fluidity and
continuity of water flow, the transport and exchange of sediment, etc.
The matching index of sediment can reflect the channel evolution. The
matching index of minimum flow can reflect whether the incoming flow
meets the ecological flow. The matching index of maximum flow can
reflect whether the flood is a floodplain, which can also reflect the
lateral connectivity.
Figure 2 Index system of the AHP; (a) Index System of Water System
Connectivity; (b) Weight obtained by the AHP for channel connectivity