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• W4304808972 abstract "Abstract Significant improvement in wastewater treatment is the most effective way for eutrophication control in semiarid regions. However, its effect on the nutrient status of the receiving water body has remained poorly considered and understood at broad temporal scales. Taking Guanting Reservoir (GR) in Hebei-Beijing (P. R. China) as an example, we present a study that links a continuous monitoring dataset for GR with corresponding estimates of human-induced nutrient discharges in its watershed from the year 2006 to 2019. We find that GR showed decreasing total nitrogen (TN), and total phosphorus (TP) concentrations and increasing TN/TP mass ratios, and the decreasing trend of TP was faster than that of TN. The improved municipal wastewater treatment capacity is mainly responsible for the decreasing TN, and TP concentrations and the increasing TN/TP ratios in GR, as phosphorus is easier to remove from wastewater than nitrogen. Although wastewater treatment capacity has improved, the observed TP of GR (93.7 μg L -1 ) is higher than the threshold value of harmful algae blooms occurring (50 μg L -1 ) in recent years (2016-2019). Given the potential ecological impact on aquatic biodiversity as well as ecosystem function of changes in TN/TP ratios and higher retention rate of TP (97.4%) compared with TN (93.1%) in GR, our findings highlight that future strategy for water pollution control should not only concentrate on more nutrient reduction efficiencies but attach importance to their stoichiometric balance to reduce the potential risk of eutrophication during the recovery of GR." @default.
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• W4304808972 date "2022-10-12" @default.
• W4304808972 modified "2023-10-18" @default.
• W4304808972 title "Improvement in water pollution control alters reservoir nutrient stoichiometry of Guanting Reservoir in the Winter Olympic host cities, North China" @default.
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• W4304808972 doi "https://doi.org/10.21203/rs.3.rs-2039590/v1" @default.
• W4304808972 hasPublicationYear "2022" @default.
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