Analysis Of Landscape Ecological Mechanism And Management Study Of The Influence Of Large-scale Reclamation To Water Quality Environmental In The Estuary

Wetland is an important land resource and reclamation is an important means to resolve the contradiction between the people and the land, and boost the development of economy. But unreasonable-exploitation will result many negative influence to the ecosystems. Unreasonable reclamation makes a quantity of wetland disappear, causing damage to the community of the benthic organism; Unreasonable reclamation makes the configurations of mudflat wetland change, reducing the effect of the water dynamic ; Unreasonable reclamation n makes the body of water stratified, causing a lack of oxygen in the waher; All those changes make the quality of water deteriorate. The paper investigates the state of affairs of red tide and configurations of coastline of coastal provinces in the mainland of china .Based on the theories of landscape structure and function, landscape sensitivity etc, the paper analyses the relation between configurations of the coastlines and the ability of purification of the water; the paper also investigates the configurations of eight gulfs in and abroad respectively and the diversity of the benthic organism correspondingly, then analyses the relation between patterns of the gulf and the ability of purification of the water. Then we concludes the rule of influence about patterns and the size of reclamation to the ability of purification of the estuary through a lot of examples. The paper investigates the change of the ability of purification of QianTangjiang after reclamation, analyses its landscape mechanism .We make the prediction of the influence of YanZhan construction to the water environment. At last, the thesis provides a scientific reform mode of reclamation for the purpose of keeping the hydrological balance of fiver basin, and of preventing and reducing pollution.