Journal of Environmental Biology

Studies on kinetics of water quality factors to establish water transparency model in Neijiang River, China 

Ronghui Li¹,Wei Pan¹, Jinchuan Guo¹, Yong Pang³,Jianqiang Wu⁴,Yiping Li³, Baozhu Pan⁵, Yong Ji⁶ and Ling Ding²*

¹Guangxi Institute of Water Resources Research, Nanning-530 023, China

²Shanghai Investigation, Design & Research Institute, Shanghai-200 434, China

³College of Environment, Hohai University, Nanjing-210 098, China

⁴Shanghai Academy of Environmental Sciences, Shanghai-200 233, China

⁵Changjiang River Scientific Research Institute, Wuhan-430 010, China

⁶College of Hydraulic and Ecological Engineering, Nanchang Institute of Technology, Nanchang-330 099, China

*Corresponding Author E-mail: dl@sidri.com

Publication Data

Paper received:

16 October 2013

Revised received:

13 December 2013

Re-revised received:

04 January 2014

Accepted:

12 January 2014

Abstract

The basis for submerged plant restoration in surface water is to research the complicated dynamic mechanism of water transparency. In this paper, through the impact factor analysis of water transparency, the suspended sediment, dissolved organic matter, algae were determined as three main impact factors for water transparency of Neijiang River in Eastern China. And the multiple regression equation of water transparency and sediment concentration, permanganate index, chlorophyll-a concentration was developed. Considering the complicated transport and transformation of suspended sediment, dissolved organic matter and algae, numerical model of them were developed respectively for simulating the dynamic process. Water transparency numerical model was finally developed by coupling the sediment, water quality, and algae model. These results showed that suspended sediment was a key factor influencing water transparency of Neijiang River, the influence of water quality indicated by chemical oxygen demand and algal concentration indicated by chlorophyll a were indeterminate when their concentrations were lower, the influence was more obvious when high concentrations are available, such three factors showed direct influence on water transparency. ? 

 Key words

Impact factors, Neijiang river, Numerical model, Suspended sediment, Water transparency 

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