Studying On The Aquatic Entironment Of Phytoplankton In Excavating Coal Subsidence Pool In Mine

Excavate coal pool is one of the important geologic hazards, and it was caused by the exploitation of coal in mine. The area of excavating coal subsidence are extended with the increasing of the exploitation of coal in recent years. It caused the mining ecological environment to get worse, and added the amount of subsidence pools. At present the excavating coal subsidence water area has become a special component of the surface water in Huainan. So studying on the aquatic ecological environment of the subsidence pool, knowing about the species of the phytoplankton and its response for the mine environment, seeking the main driving and restrict factors on the succession of phytoplankton and mastering the nutrition level it showed are very imperative for ascertaining the contaminated degree and types as well as developed trend.In this paper, the concentration of nutrition and correlative physical chemistry indices as well as chlorophyll a were investigated monthly form Mar.in 2004 to Feb. in 2005 in Xie-er Mine subsidence pool which was formed for many years. The qualitative and quantitative analysis for phytoplankton in the pool were tested from Apr. to Dec. in 2004. Based on the water ecological environment monitoring for Xie-er Mine excavating coal subsidence pool in Huainan, the nutrition level and the main restrict factors as well as the environment characteristic and the succession law of phytoplankton are analyzed in the pool, the utilizing status of fishery resources in the pool was analyzed simply at the same time. All of the above are very important for the special water resources of the subsidence pool's rational exploitation, using and controlling.