The system of sediment-interstitial water in typical inner-city hyper-eutrophic lake in Wuhan City was studied. Sediments of this system were sequentially extracted in natural granularity. The result showed that there was a good linear relationship between organic matter （OM） and org / bact P contents in sediments. This organic matter in sediments was the source of org / bact P. The total phosphorus in sediments dominated the content of total dissolved phosphorus and phosphate in interstitial water. In addition, there were good relatiohships ...
