Statistic of different suitabilities of wetland restoration in Figure 2 shows that only a little part of wetland in the Yongdinghe River has a high suitability to be restored, accounting for 2.32%, while the lowest suitability of wetland restoration takes up the most area with a percent of 52.6. And the suitability levels of low, middle and high account for 24.96%, 10.35% and 9.76% respectively.