The method of scenario design can be demonstrated by the following procedures(fig.2):1) Through submerging modeling and considering associated ecological and socioeconomic impacts, the multi-target scenarios could be
identified addressing different goals such as water storage and flood control, biodiversity conservation and eco-agriculture landuse; 2) Based on habitat suitability analysis, the potential target physiotopes in different water level
and slope can be developed respectively, and the potential target ecotopes could be definded. 3) With overall
considerations of restoration feasibility and the characteristics of each function divisions in NNR, the target ecotopes
of each scenario were accommodated and decided by comparing existing ecotope and its potential target 4) By
confronting target ecotopes with existing situation, the measures to realize the different desired targets with
knowledge-based system and its spatial location thus can be elaborated(table 2