Deciphering Eutrophication-Limiting Nutrients in Lakes: A Multiscale Analysis of Chinese Waters

ACS ES&T Water, Journal Year: 2024, Volume and Issue: 4(7), P. 2995 - 3006

Published: June 24, 2024

The total nitrogen/total phosphorus (TN/TP) ratio is considered a valuable indicator for evaluating the abundance of phytoplankton and eutrophic condition water body, but its effectiveness as an eutrophication at different watershed scales has not been fully explored. In this study, we collected data from 103 lakes within four major watersheds in China utilized machine learning models eXtreme Gradient Boosting (XGBoost) k-nearest neighbors (KNN) to predict TN/TP three scales. We identified notable disparities ratio, chlorophyll concentration, algal cell density across By incorporating time input variable, were able capture temporal trends which enhanced predictive accuracy fit models. optimization ratios model indicators' coefficient determination, root-mean-square error, mean absolute percentage error are 35.71 ± 25.26%, 0.43 0.17%, 1.47 1.19%, respectively. XGBoost demonstrated higher better than KNN. Our results reveal substantial impact scale on predicting eutrophication-limiting nutrients bodies.

Language: Английский

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Assessment of grey water footprint pressure in the Yangtze River basin and its relationship with water quality

Deleted Journal, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 1, 2024

Language: Английский

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Succession and Driving Factors of Macrophytes During the Past 60 Years in Lake Erhai, China

Water, Journal Year: 2024, Volume and Issue: 16(24), P. 3645 - 3645

Published: Dec. 18, 2024

Macrophytes play a crucial role in maintaining the health of lake ecosystems. A thorough understanding their long-term evolutionary processes and patterns is great theoretical practical significance for ecosystem restoration mitigation eutrophication. The succession process driving factors macrophytes Lake Erhai aquatic were systematically analyzed using investigation macrophytes, literature research, classification. survey conducted July 2022 showed that macrophyte community seriously degraded, with species numbers notably lower than historical levels from decade ago (2011). distribution area declined by over 70% compared to its peak 1980s. Over past 60 years, has undergone successive processes, including expansion, peak, decline, stabilization. dominant populations gradually transitioned being indicative clean water pollution-tolerant species. development cascade hydropower projects on Xi’er River increased outflow capacity Erhai; these have resulted substantial fluctuations levels, eutrophication lake, pollutant discharge exceeding Erhai’s environmental capacity, climate change basin. Our research provides important references ecological management early eutrophic lakes China.

Language: Английский

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Vertical distribution characteristics of microplastics and bacterial communities in the sediment columns of Jianhu lake in China

Environmental Geochemistry and Health, Journal Year: 2024, Volume and Issue: 47(1)

Published: Dec. 20, 2024

Language: Английский

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