EVOLVEMENT AND CONSERVATION OF WETLAND IN THE MIDDLE REACHES OF THE YANGTZE RIVER

In this paper, we firstly introduced briefly the wetland in the middle reaches of the Yangtze River, and then analyzed the actualities of wetland evolvements affected by integrated physical and anthropic factors, including atrophy of wetland area, decline of wetland functions, immoderate and excessive exploitation and utilization of wetland resources, the decrease of bio-diversity, increasingly serious pollution of the wetland environment and damage of the wetland whole value. And then we discussed the evolvement of several relationships in the evolving process of the wetland, including relationships between the Yangtze River and related lakes, flood storage and discharge, related mountains and lakes (rivers), lakes and polders. Finally, we highlighted prospects in wetland conservation by proposing some countermeasures on the basis of river basin integrative management(RBIM), including the unification of the river basin integrative management, the better programming of wetland conforming to the principles of RBIM and the organization of all relationships in relation to wetland systems, strengthening of ecological management pattern research and comprehensive treatment of the soil and water loss in the upper and middle reaches of the Yangtze River, as well as the construction and management of wetland nature reserve, and protect the wetland bio-diversity.