Computing the total indices of the conjunctive operation of all projects of the basin such as the changing of hydrologic and sedimentation regime,etc. to assess the whole environmental impacts on the middle,lower reaches,and the estuary.

• 从方案中各工程联合运转的各种总指标如水文变化、泥沙变化等，评价对中、下游及河口的总体影响。