Table 1 Channel connectivity index system
In the AHP model, channel connectivity is regarded as the objective
layer. Boundary, flow and sediment are connected as the second layer,
namely, the subsystem layer t. Among all kinds of indexes, the boundary
connectivity indexes include the stability coefficient C1 and stream
gradient C2. The flow connectivity indexes include discharge capacity
C3, runoff C4, matching index of maximum flow C5, and matching index of
minimum flow C6. The sediment connectivity indexes include sediment load
C7 and sediment matching index C8, and all kinds of indexes are listed
as the third layer, namely, indicator layers (Fig. 2a).