摘要
于1995年4月—1996年1月对杭州西湖沉积物的若干物理、化学性状作了研究沉降试验表明，沉积物中粒径在0．067－0．0029mm之间的颗粒占沉积物总量的80．8％，0．0029mm以下的占4．3％．基本属于粉砂级范围，沉积物受扰动后再悬浮会明显影响水体的透明度，沉积物处于中性（pH＝6．60－7．40）和低厌氧状态（Eh＝－3mV至167mV）．界面溶解氧含量在1mg／L，左右，沉积物生物产量数（BPN＝0．4836）和烧失量与全氮量之比（IG／TN＝22．54－30．71）表明西湖是富营养的腐殖型湖泊。沉积物参数的主成分分析证实了西湖沉积物的沼泽来源，并表明引水后小南湖沉积物特征与其它湖区相比已有较大差异。
Some physical and chemical characteristics of sediment in West Lake, Hangzhou are discussed in this article. Precipitation trial test shows that particles with diameter between 0. 067mm and 0. 0029mm constitute 80. 6 per cent of the total sediment in West Lake, and particles with diameter below 0. 0029mm constitute 4. 3 per cent of the total, and suspended particles can apparently affect the diaphaneity of water. Sediment in West Lake is situated in a neutral anaerobic status (pH = 6. 60 - 7. 40; Eh = - 3mV to 167mV), DO on the interface between water and sediment approximately equals lmg/L. Biology production number (BPN =0. 4836) and IG - total nitrogen ratio (IG/TN = 22. 54 - 30. 71 ) of sediment show that West Lake has a characteristic of both hyperproductive and high humus content. Principal Component Analysis (based on sediment parameters) demonstrates that the precursor of West Lake sediment is bog, and sediment in Xiaonan Lake is apparently different from other areas due to the diversion operation.
出处
《湖泊科学》
EI
CAS
CSCD
1998年第1期79-84,共6页
Journal of Lake Sciences
基金
浙江省自然科学基金!294059
关键词
沉积物
杭州西湖
营养物质
主成分析
化学性状
Sediment, West Lake(Hangzhou), nutrients, Principal Component Analysis
