Evaluating Nationwide Non-Point Source Pollution of Crop Farming and Related Environmental Risk in China

Yang Duan; Hongqiang Jiang; Xiao Huang; Wenhui Zhu; Jie Zhang; Bo Wang; Wenjun Wu

LAPSE

Living Archive for Process Systems Engineering

LAPSE:2023.36734

Published Article

LAPSE:2023.36734

Evaluating Nationwide Non-Point Source Pollution of Crop Farming and Related Environmental Risk in China

Yang Duan, Hongqiang Jiang, Xiao Huang, Wenhui Zhu, Jie Zhang, Bo Wang, Wenjun Wu

September 21, 2023

The increase in non-point source (NPS) pollution from agricultural cultivation and production sources has been cited as one of the main reasons for water eutrophication. This study built a national NPS database and estimated the nutrient (including both nitrogen (N) and phosphorus (P)) balance and NPS pollution of crop farming at the county level in 2015. Finally, the NPS pollution risks were assessed, and relative policy suggestions were provided. The results indicated that (1) in 2015, the total amounts of N and P surpluses in China were 7.95 and 7.39 million tons, respectively. The south of the Yangtze River had a relatively higher nutrient surplus compared to that in northern China. (2) The NPS emissions for N and P in China were 168.84 × 104 tons and 8.93 × 104 tons, respectively, with the highest NPS loads occurring in the eastern part of the Sichuan Basin, southern China and southwestern China, while the lowest loads occurred in northeast China. (3) The potential risk assessment results showed that a broad division emerged at the Yangtze River basin, with the northern area under lower risk than the southern area. This estimation work can provide guidance and technical support for local government and policy makers to control NPS pollution.

Record ID

LAPSE:2023.36734

Keywords

non-point source pollution, nutrient balance, nutrient budget, pollution risk assessment, spatial and temporal distribution

Subject

Environment

Suggested Citation

Duan Y, Jiang H, Huang X, Zhu W, Zhang J, Wang B, Wu W. Evaluating Nationwide Non-Point Source Pollution of Crop Farming and Related Environmental Risk in China. (2023). LAPSE:2023.36734

Author Affiliations

Duan Y: State Environmental Protection Key Laboratory of Environmental Planning and Policy Simulation, Chinese Academy of Environmental Planning, Beijing 100041, China; The Center for Beijing-Tianjin-Hebei Regional Environment, Chinese Academy of Environmental Pl
Jiang H: State Environmental Protection Key Laboratory of Environmental Planning and Policy Simulation, Chinese Academy of Environmental Planning, Beijing 100041, China; The Center for Beijing-Tianjin-Hebei Regional Environment, Chinese Academy of Environmental Pl
Huang X: Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, College of Environment, Hehai University, Nanjing 210098, China
Zhu W: The Center for Innovation of Zero-waste Society, Chinese Academy of Environmental Planning, Beijing 100041, China
Zhang J: College of Information and Electrical Engineering, China Agricultural University, Beijing 100085, China
Wang B: The Ecological Environment Institute, Chinese Academy of Environmental Planning, Beijing 100041, China
Wu W: State Environmental Protection Key Laboratory of Environmental Planning and Policy Simulation, Chinese Academy of Environmental Planning, Beijing 100041, China; The Center for Beijing-Tianjin-Hebei Regional Environment, Chinese Academy of Environmental Pl

Journal Name

Processes

Volume

11

Issue

8

First Page

2377

Year

2023

Publication Date

2023-08-07