Abstract: In ecological management of Lake Wuliangsuhai,an environmental monitoring and information system has been established based on the 3S technology,and is used to perform real-time monitoring of the project of ecological management of Lake Wuliangsuhai,to manage spatial and non-spatial data and to build up an engineering and technical archival repository.In order to keep the ecosystem in a benign cycle it is essential to harmonize ecological rehabilitation and economic benefit by planning reasonably and orienting in depth,to determine relationship between input and output of various nutrients,to evaluate comprehensively effects of protection and exploitation and hence to,realize macroscopic control of the role of Lake Wuliangsuhai multi-functional ecological system,and to keep on improving and amending technical parameters of the ecological management plan.

Key words: Lake Wuliangsuhai, 3S integrated techn