Study on the Effect of Water System Connection on the Improvement of Water Quality of Inner Lakes in Town—Taking Seven Lakes in Yangshuo Urban Area of Guilin as an Example

Water, Год журнала: 2025, Номер 17(9), С. 1398 - 1398

Опубликована: Май 7, 2025

Urban lake degradation caused by intensive urbanization necessitates systematic solutions, with water connectivity being a crucial ecological restoration strategy. This study evaluates the two-year effects (2020–2022) of interventions on seven lakes in Yangshuo, Guilin, classified connectivity: multi-channel (Mc), single-channel (Sc), and non-connected (Nc). Regular monitoring physicochemical parameters microbial communities revealed significant patterns: connected exhibited superior quality improvement, trophic state downgrading (weak eutrophic → mesotrophic), but Sc-BQ was deteriorating. Seasonal variations showed wet season peaks pH, DO, CODMn, Chl-a, versus dry elevations NH3-N, NO3-N, TN, TP. Correlation analysis identified organic matter as primary driver eutrophication, TN strongly linked to indicating persistent domestic sewage contamination. Microbial community restructuring accompanied changes quality, abundance diversity OTUs decreased after restoration. Notably, Limnohabitans dominated Mc (31.82–35.1%), while Pleurocapsa prevailed (37.85%) Nc-LH under weak conditions. These findings demonstrate that effectively enhances hydrodynamic conditions pollutant dispersion, whereas inadequate exacerbates nutrient accumulation. The provides critical empirical evidence for optimizing urban management, emphasizing necessity multi-dimensional designs targeted control untreated inputs system rehabilitation projects.

Язык: Английский

Carbon steel Q235 corrosion protection by metabolism of Bacillus cereus biofilms in cooling water environment

International Biodeterioration & Biodegradation, Год журнала: 2025, Номер 203, С. 106124 - 106124

Опубликована: Май 22, 2025

Язык: Английский