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Mar Pollut Bull. 2018 Aug;133:349-356. doi: 10.1016/j.marpolbul.2018.05.050. Epub 2018 Jun 19.

Assessment of nitrogen reduction by constructed wetland based on InVEST: A case study of the Jiulong River Watershed, China.

Author information

1
Key Laboratory of the Ministry of Education for Coastal Wetland Ecosystems, College of the Environment and Ecology, Xiamen University, Xiang'an South Road, Xiamen 361102, China.
2
Graduate Institute of Environmental Engineering, National Taiwan University, Taipei 10673, Taiwan.
3
Key Laboratory of the Ministry of Education for Coastal Wetland Ecosystems, College of the Environment and Ecology, Xiamen University, Xiang'an South Road, Xiamen 361102, China. Electronic address: wzcao@xmu.edu.cn.

Abstract

The Jiulong River watershed (JRW) in southeast China includes livestock breeding and agriculture, leading to large amounts of non-point source pollution. Nitrogen (N) reductions were simulated and mapped using the Integrated Valuation of Ecosystem Services and Tradeoffs (InVEST) under scenarios that were built considered both constructed wetlands (CWs) and climate change, which are not common in the literature on ecosystem services assessments. The results showed that the amount of N exported from non-point sources within the JRW was 12,569 t·yr-1. The areal N load was relatively higher in the north, while more N exported in the southeast. Constructed riparian wetlands can intercept and reduce the N loads that enter water bodies, but climate change may be a factor driving the deterioration of water quality. The methodology can be generalized to reduce other contaminants, and provides a tool for decision-makers to weigh the costs and benefits of urbanization and conservation.

KEYWORDS:

Climate change; Constructed wetland; InVEST; Nitrogen reduction

PMID:
30041324
DOI:
10.1016/j.marpolbul.2018.05.050
[Indexed for MEDLINE]

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