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For providing refer to the experimental data of artificial floating island in river north, this study will get stability characteristics of artificial floating islands displacement pile fixation on simulating the impact of different flow rate of water. Analysising physical stress of artificial floating island displacement pile fixation and simulation, result shows that the sum of floating island of buoyancy and the maximum force of two fiber rope in the vertical direction should be greater than the maximum gravity of the floating island plants and ensure the maximum force of the two fiber rope in the horizontal direction must be greater than the flow momentum, the quality of floating island can be increased for improving stability. Depend on the different flow of water and linear regression equation, the distance between the floating island should be arranged reasonably.

For the purpose to provide a reference for ecological floating island construction of Liao river, this paper simulated different flow velocity to research the stability of floating island with different fixation methods based on the actual hydrological data of Liao river at the comprehensive experimental base of Shenyang agricultural university. Results show that the stability of floating island with different fixation methods under different flow velocity have significant difference. The data of longitudinal displacement shows the stability of staking floating island is best, the following one is cableway and the sinker is worse. The data of lateral displacement shows the stability of cableway floating island is best, the following one is staking and the sinker is worse. The data of vertical floating displacement shows the stability of cableway floating island is best, the following one is sinker and the staking is worse. Comprehensively, the stability of cableway floating island is best, staking is better and the sinker is less stable. Consequently, this study recommended the cableway and staking floating island as the ideal types in experimental construction in Liaohe river.

In order to restore ecological function of wetland, determine the exploitation plan of water resources reasonably and promote the sustainable development of ecological function in wetland, based on the exploitation and utilization situation as well as the planning objectives of Panjin Shuangtai estuary wetland, this essay focuses on discussing water demand of natural ecological system, water quality of agricultural irrigation and aquaculture, and residential water consumption in wetland. Using various areas of wetland as decision variables and aiming to restore the size of all areas back to that in 2000, this essay takes the view of system engineering as guidance, establishes multi-objective programming model for rational allocation of wetland resources, and makes it able to compare with the other three created configurations plans. Results show that only giving priority to the needs of ecological water consumption of wetland to achieve an efficient use of surrounding water resources can we make the recovery of this wetland better and faster, and therefore achieve a desired sustainable development of ecological function. This has an important significance in leading us to a sustainable development of ecological restoration and constructing a framework of coordinated use of water resources of wetland system.