| Issue |
E3S Web Conf.
Volume 707, 2026
2026 2nd International Conference on Energy Engineering and Pollution Control (EEPC 2026)
|
|
|---|---|---|
| Article Number | 01009 | |
| Number of page(s) | 4 | |
| Section | Energy Engineering and Environmental Pollution Control | |
| DOI | https://doi.org/10.1051/e3sconf/202670701009 | |
| Published online | 27 April 2026 | |
Spatiotemporal Evolution of Nitrogen Species and Physico-chemical Characteristics in a Gate-controlled Canal Impacted by Mariculture
1 College of Marine and Environmental Sciences, Tianjin University of Science and Technology, 300457 Tianjin, China
2 Tianjin Binhai New Area Environmental Innovation Research Institute, 300450 Tianjin, China
* Corresponding author: This email address is being protected from spambots. You need JavaScript enabled to view it.
.
Abstract
Centralized discharge of mariculture tailwater significantly impacts coastal river quality. This study investigates the Fuzhuang Drainage Canal in Tianjin to analyze the evolution of physicochemical indicators and nitrogen speciation during the mariculture cycle (May–September). Results show the main channel is heavily influenced by high salinity, with a mean EC of 30900 μS/cm. Nitrogen speciation exhibits significant spatial heterogeneity driven by hydraulic conditions and aquaculture discharge. Notably, during the September harvest, gate regulation coupled with high-load tailwater causes a rapid transition from oxidative to reductive states, leading to marked ammonia and nitrite accumulation. This study identifies the harvest period as a critical management window, providing a scientific basis for refined water quality scheduling in coastal aquaculture zones.
© The Authors, published by EDP Sciences, 2026
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.