Abstract
The aim of this chapter is to describe the effect of damming on water quality in the tributaries of the Three Gorges Reservoir. The high demands of modern societies for electricity are leading to the worldwide growth in damming rivers. Dammed rivers experience dramatic changes from natural lotic to seemingly lentic conditions behind the dam walls, accompanied by nutrient accumulation and transparency improvement leading to eutrophication. Therefore, how damming has affected the tributaries within the reservoir catchment is an unavoidable topic when assessing human pressures on inland waters. This chapter presents two well-studied 1st order tributaries of the Three Gorges Reservoir regarding, their eutrophication and management as consequences of the dam. By analyzing hydrological, biological and water quality data of these two tributaries during the algal bloom seasons, this study shows that although located in the same reservoir catchment, the mechanisms of algal blooms in these two rivers are different, leading to them having increased algal biomass in different seasons, and therefore requiring different mitigating measures.
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