ORIGINAL RESEARCH
The Water Environment Carrying Capacity of the Aiyi River Based on Artificial Neural Networks
Xiaoli Kai 1, 2  
,  
Xiaocong Qiu 3  
,  
Yan Wang 3  
,  
Weijiang Zhang 1, 4  
,  
Juan Yin 1, 4  
 
 
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1
School of Civil Engineering and Hydraulic Engineering, Ningxia University, Yinchuan, China
2
Earth and Environmental College, Anhui University of Science and Technology, Huainan, China
3
School of Life Science, Ningxia University, Yinchuan, China
4
Key Laboratory of Restoration and Rehabilitation of Degraded Ecosystems in Northwestern China, Ministry of Education, Yinchuan, China
CORRESPONDING AUTHOR
Xiaocong Qiu   

Ningxia University
Online publish date: 2019-08-09
Submission date: 2018-09-09
Acceptance date: 2018-12-11
 
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ABSTRACT
To understand the characteristics of the water’s environmental carrying capacity in the Aiyi River in Yinchuan, Ninxia, China, a BP artificial neural network analysis based on water environmental factors and aquatic biodiversity metrics were conducted. Twelve indicators were used to construct an evaluation index system to examine the water environment carrying capacity of the river, namely ratio of water supply and water requirements; ratios of water environmental capacity to pollutant emissions of CODMn, BOD5, TN, NH3-N, and TP; self-purification rate; biodiversity indices of phytoplankton, zooplankton zoobenthos, and aquatic macrophytes; and a comprehensive nutrition state index. A model of water environmental carrying capacity was constructed according to the BP artificial neural network. The model, which quantitatively analyzed the water environmental carrying capacity of the Aiyi River, found it to be in the basic carrying state.
eISSN:2083-5906
ISSN:1230-1485