Influence of landscape patterns on nitrate and particulate organic nitrogen inputs to urban stormwater runoff

Yifan Hou; Shihui Wang; Yukun Ma; Zhenyao Shen; Ashantha Goonetilleke

doi:10.1016/j.jenvman.2023.119190

Influence of landscape patterns on nitrate and particulate organic nitrogen inputs to urban stormwater runoff

J Environ Manage. 2023 Dec 15:348:119190. doi: 10.1016/j.jenvman.2023.119190. Epub 2023 Oct 12.

Authors

Yifan Hou¹, Shihui Wang¹, Yukun Ma², Zhenyao Shen¹, Ashantha Goonetilleke³

Affiliations

¹ State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, 19 Xinjiekou Outer Street, Beijing, 100875, PR China.
² State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, 19 Xinjiekou Outer Street, Beijing, 100875, PR China. Electronic address: ykma@bnu.edu.cn.
³ Faculty of Engineering, Queensland University of Technology (QUT), GPO Box 2434, Brisbane, Queensland 4001, Australia.

PMID: 37837768
DOI: 10.1016/j.jenvman.2023.119190

Abstract

This study investigated the effect of the landscape pattern of permeable/impermeable patches on NO₃^--N and particulate organic nitrogen (PON) concentrations during stormwater runoff transport and their source contributions. Six landscape pattern indices, namely, mean proximity index (MPI), largest patch index (LPI), mean shape index (MSI), landscape shape index (LSI), connect index (CONNECT), and splitting index (SPLIT), were selected to reflect the fragmentation, complexity, and connectivity of permeable patches in urban catchments. The results show that lower fragmentation, higher complexity, and greater connectivity can reduce NO₃^--N concentrations in road runoff and drainage flow (i.e., the flow in the stormwater drainage network), as well as PON concentrations in road runoff. Further, the above landscape pattern is effective for mitigating the contributions of NO₃^--N and PON from road runoff. Low impact development (LID) can be incorporated with the landscape pattern of permeable/impermeable patches to mitigate nitrogen pollution in urban stormwater at the catchment scale by optimizing the spatial arrangement.

Keywords: Landscape pattern; Low impact development; Nitrate; Particulate organic nitrogen; Permeable/impermeable patches; Stormwater quality.

MeSH terms

Dust
Environmental Monitoring / methods
Nitrates* / analysis
Nitrogen / analysis
Organic Chemicals / analysis
Rain
Water Movements
Water Pollutants, Chemical* / analysis

Substances

Nitrates
Nitrogen
Water Pollutants, Chemical
Organic Chemicals
Dust