The choice on the best deepness of obtaining sample of water in the simulating examination on nutrients removing and transforming in sediment-water interface

The supplyof high nutrient fluxes can cause significant changes in the structure and function of the plant community in these ecosystems,and these changes will further influence the nutrient transport in the est.

To better understand the relationship between the natural environment-induced changes versus changes caused by human activities during the process of eutrophication,we tried to evaluate nutrient transportation over catchments and its contribution to lake eutrophication by working on the Honghu Lake Basin located at the middle reach of the Changjiang River,as an example.