Multi-analysis of Chlorophyll-a and Environmental Factors in a Surface Water Source in Zhengzhou, China
- VernacularTitle:郑州市某地表水源叶绿素a与相关环境因子的关系
- Author:
Xiaohui LIU
;
Guoli YAN
;
Liuxin CUI
- Publication Type:Journal Article
- Keywords:
Water;
Chlorophyll-a;
Stepwise multiple regression
- From:
Journal of Environment and Health
1992;0(02):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To research the nutritive condition and establish prediction model of chlorophyll-a(Chla) in a surface water source of Zhengzhou, China. Methods The water temperature(WT), Secchi-depth(SD), chemical oxygen demand(CODMn), total nitrogen(TN), total phosphorus(TP), Chla were determined in two sampling sites of the water source by standardized methods from Mar, 2004 to Oct, 2004. Nutritive condition of the water source was analyzed by trophic level index(?)[TLI(?)]. The influence of some environmental factors on Chla was analyzed by correlation analysis and stepwise multiple regression. Chla was predicted by establishing a stepwise multiple regression equation. Results In the spring, summer and autumn, nutritive condition of the water source was from the maximum of mesotropher, the maximum of light eutropher to the minimum of middle eutropher. A positive correlations were found between the standardized Chla and WT, CODMn, TP. A negative correlation was found between the standardized Chla and SD. The equation was ln(CChla+1)=-0.114+0.083 48 WT+6.874 TP+0.193 CODMn(R2=0.900, F=62.674, P
