Abstract:By determining the nutrient and water contents in surface sediment in different region of Changdang Lake, combined with statistical analysis method, the spatial distribution and pollution characteristics were discussed. The results showed that the concentration of nutrient ranged from 3. 47 to 10. 80 g/kg for TN, from 0. 57 to 1. 83 g/kg for TP, from 0. 66% to 4. 21% for TOC, from 41. 71% to 75. 78% for water, with an average of 6. 86 g/kg, 1. 19 g/kg, 1. 73% and 60. 48%, respectively, which all had spatial distribution of high content in surrounding and low in central in the lake. A significant linear correlation was observed among total nitrogen, total phosphorus and water content, while there was not significant correlation among total organic carbon and total nitrogen, total phosphorus and water content. The enrichment coefficients varied from 0. 7 to 2. 0 for total nitrogen, from 0. 6 to 2. 0 for total phosphorus and from 0. 4 to 2. 5 for total organic carbon, with an average of 1. 3, 1. 3, 1. 0, respectively. And that pollution index varied from 6. 3 to 19. 6 for total nitrogen, from 1. 0 to 3. 1 for total phosphorus and from 0. 7 to 4. 2 for total organic carbon, with the average of 12. 5, 2. 0 and 1. 7, respectively, indicating that nitrogen level was in heavily polluted state and Changdang Lake was under a certain level of pollution of phosphorus, organic carbon in the surface sediment.