Three-Gorges Reservoir ＂Aigae Bioom＂ Conditions——An investigation

The Three-Gorges Reservoir lies in the west of China where economic development is at low level. The construction of water conservancy cannot only boost economy of local agriculture, but also make local ecosystem become unstable in a period of time. The Three-Gorges Reservoir has begun storing water for 3 years from June 2003, ＂algae bloom＂ is a particular pollutant in the course of super water conservancy. By monitoring the disquisitive ＂algae bloom＂ in the Three-Gorges Reservoir, from points of view of circulation, water character, weather, temperature, abundant azote, abundant phosphor, accrue spend, pH, delay glide. It is confirmed that especially different interactional colligate courses including water character state of affairs, human character, physics chem. abc warfare course, sedimentation, adsorb and abc warfare, bring about ＂algae bloom＂. The conclusion shows that ＂algae bloom＂ happened in the Three-Gorges Reservoir is not only a simple physical-chemical process, but also an integrated process including water conservancy, literae humaniores, physics, chemistry, biologic deposition, absorption, release and decomposing. Peculiar hydrological regime of the reservoir is an important condition for ＂algae bloom＂. The depths in different positions are also unbalanced, making different vegetations of algae in different tributaries in the same season and air temperature,