摘要
通过社会科学通用统计软件 (SPSS)对长江 195 9- 1984年溶解硅浓度、流量、降雨量、氮、磷等水文资料之间的相关性进行了分析 ,并分别进行了线性回归分析 .较系统地阐明 :195 9- 1984年 ,长江溶解硅呈明显下降趋势 ,与逐年增加的降雨量、流量和氮、磷通量成鲜明对比 ,使我们对目前硅通量的变化趋势有较深刻的认识 .
The authors statisticaly analysis the hydrographic data of dissolved silicate, discharge, precipitation, sediment, nitrate and phosphate from 1959 to 1984 in the Changjiang River, and does correlation analysis and regression analysis by Social Purpose Statistical Software. The records show a remarkable decrease tendency in dissolved silicate concentration. The average concentration of dissolved silicate in 1963 is 9.45 mg/L, in 1973 is 7.39 mg/L and 6.25 mg/L in 1983 respectively. However, precipitation, discharge, nitrate and phosphate show increase tendency. The relation between dissolved silicate and other hydrographic data (precipitation, discharge, nitrate and phosphate) show negative relation, and the relation between dissolved silicate and sediment show positive relation. Those were caused by human activities.
出处
《曲阜师范大学学报(自然科学版)》
CAS
2001年第3期98-102,共5页
Journal of Qufu Normal University(Natural Science)
关键词
溶解硅
统计
回归分析
人类活动
长江
河流
dissolved silicate
statistics
regression analysis
human activity