白洋淀污染物时空变化规律及其对生态系统影响的探讨

根据1988-2000年的白洋淀实测水质资料,分析了白洋淀主要污染物质的时空分布规律,及其对白洋淀生态系统的影响。白洋淀6─9月份污染物浓度最大,水质较差,水生生物种群数量相对减少,各种污染物指标年际间无明显规律,但都大致呈逐年增大趋势。根据监测断面的地理位置及淀内水体流动的特点,划分出3个污染带,各种污染物沿污染带浓度均逐渐降低,从而分析出对白洋淀生态系统的影响。

Spatial and Time Variation Rules of Pollutants in the Baiyangdian Lake Area and Its Influence on the Eco-System

Based on the water quality data of the Baiyangdian Lake area from 1988 to 2000,the spatial and time variation rules of the main pollutants and its influence on the eco-system of the Lake area has been analyzed.The pollutants are in the largest concentration from June to Sept with poor water quality,resulting in relatively declining the number of aquatic organisms.Each kind of pollutant index has not obvious yearly fixed but in increasing trend.Based on the geography and water flowing character of the monitored sections,three pollution belts has been marked.Along with the belts,the pollutant concentration is gradually reduced,thus it could reasonably analyze the influence to the eco-system of the Baiyangdian Lake area.