Long-term variations of water quality and nutrient load inputs in a large shallow lake of Yellow River Basin: Implications for lake water quality improvements

Yu, Shulong; Du, Xinzhong; Lei, Qiuliang; Wang, Xue; Wu, Shengcai; Liu, Hongbin

doi:10.1016/j.scitotenv.2023.165776

Cited by 9 publications

(2 citation statements)

References 23 publications

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“…The easiest to treat are local causes, in particular when a lake health issue can be related to a local point source. Many countries have come far in identifying and successfully treating local point sources, the implementation of waste water treatment plants that cured many lakes from infections and eutrophication being an example (Krantzberg, 2012; Yu et al., 2023). Sometimes the causes of a lake health issue might not be known, and for this reason only the symptoms can be treated.…”

Section: Treatment Strategiesmentioning

confidence: 99%

Global Lake Health in the Anthropocene: Societal Implications and Treatment Strategies

Weyhenmeyer,

Chukwuka,

Anneville

et al. 2024

Earth's Future

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The world's 1.4 million lakes (≥10 ha) provide many ecosystem services that are essential for human well‐being; however, only if their health status is good. Here, we reviewed common lake health issues and classified them using a simple human health‐based approach to outline that lakes are living systems that are in need of oxygen, clean water and a balanced energy and nutrient supply. The main reason for adopting some of the human health terminology for the lake health classification is to increase the awareness and understanding of global lake health issues. We show that lakes are exposed to various anthropogenic stressors which can result in many lake health issues, ranging from thermal, circulatory, respiratory, nutritional and metabolic issues to infections and poisoning. Of particular concern for human well‐being is the widespread lake drying, which is a severe circulatory issue with many cascading effects on lake health. We estimated that ∼115,000 lakes evaporate twice as much water as they gain from direct precipitation, making them vulnerable to potential drying if inflowing waters follow the drying trend, putting more than 153 million people at risk who live in close vicinity to those lakes. Where lake health issues remain untreated, essential ecosystem services will decline or even vanish, posing a threat to the well‐being of millions of people. We recommend coordinated multisectoral and multidisciplinary prevention and treatment strategies, which need to include a follow‐up of the progress and an assessment of the resilience of lakes to intensifying threats. Priority should be given to implementing sewage water treatment, mitigating climate change, counteracting introductions of non‐native species to lakes and decreasing uncontrolled anthropogenic releases of chemicals into the hydro‐, bio‐, and atmosphere.

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Section: Treatment Strategiesmentioning

confidence: 99%

Global Lake Health in the Anthropocene: Societal Implications and Treatment Strategies

Weyhenmeyer,

Chukwuka,

Anneville

et al. 2024

Earth's Future

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“…It is imperative to maintain the water quality and stability of river–lake systems. Many studies have shown that the concentrations of nitrogen and phosphorus are the limiting factors for the water quality stability in river–lake systems (Wang et al, 2020b ; Yu et al, 2023 ). Furthermore, nitrogen and phosphorus are the basic nutrients in the energy flow and material cycle of aquatic ecosystems, and too much or too little would disrupt the ecosystem balance (Zhang et al, 2017 ; Liang et al, 2021 ).…”

Section: Introductionmentioning

confidence: 99%

Unraveling the rate-limiting step in microorganisms' mediation of denitrification and phosphorus absorption/transport processes in a highly regulated river-lake system

Ding,

Yang,

Liu

et al. 2023

Front. Microbiol.

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River–lake ecosystems are indispensable hubs for water transfers and flow regulation engineering, which have frequent and complex artificial hydrological regulation processes, and the water quality is often unstable. Microorganisms usually affect these systems by driving the nutrient cycling process. Thus, understanding the key biochemical rate-limiting steps under highly regulated conditions was critical for the water quality stability of river–lake ecosystems. This study investigated how the key microorganisms and genes involving nitrogen and phosphorus cycling contributed to the stability of water by combining 16S rRNA and metagenomic sequencing using the Dongping river–lake system as the case study. The results showed that nitrogen and phosphorus concentrations were significantly lower in lake zones than in river inflow and outflow zones (p < 0.05). Pseudomonas, Acinetobacter, and Microbacterium were the key microorganisms associated with nitrate and phosphate removal. These microorganisms contributed to key genes that promote denitrification (nirB/narG/narH/nasA) and phosphorus absorption and transport (pstA/pstB/pstC/pstS). Partial least squares path modeling (PLS-PM) revealed that environmental factors (especially flow velocity and COD concentration) have a significant negative effect on the key microbial abundance (p < 0.001). Our study provides theoretical support for the effective management and protection of water transfer and the regulation function of the river–lake system.

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Diel and seasonal mixing patterns and water quality dynamics in a multipurpose tropical semiarid reservoir

Rocha,

Barros,

de Assis de Souza Filho

et al. 2024

Environ Sci Pollut Res

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Eutrophication has become a recurrent concern in reservoirs worldwide. This problem is intensified in tropical semiarid regions, where the reservoirs have high seasonal and annual variability of water level and volume. Therefore, an extensive understanding of the diel variation of water quality key-parameters can help improve management of such reservoirs. This study focuses on Castanhão reservoir, the largest multipurpose dam in the Brazilian semiarid. Its main water uses are irrigation, fish farming, and human supply. The reservoir faced a decline in water quality due to a prolonged drought period. While previous research has predominantly emphasized the seasonal dynamics of thermal and chemical stratification, our investigation provides diel assessments of multiple water quality parameters, including nutrient concentrations and phytoplankton abundance. Our primary objective is to compare seasonal and diel variations in stratification and nutrient distribution within the reservoir. Key findings reveal a diel cycle of thermal stratification, primarily during dry season, driven by higher wind speeds. This is corroborated by a significant negative correlation between wind speed and the relative water column stability index. In contrast, during the rainy season, the reservoir experiences continuous thermal stratification due to inflowing water being warmer than the reservoir's water temperature. Notably, a significant negative correlation between total phosphorus and chlorophyll-a, along with a two-fold increase of this nutrient throughout the day during the rainy season, underscores the influence of the phytoplankton community dynamics on the diel nutrient variation. Chemical stratification of dissolved oxygen occurred during dry and rainy seasons, indicating that even during the dry season, where there is no significant inflow, the internal nutrient loading can also significantly impact the water quality of a reservoir. This study advances the understanding of diel water quality dynamics in tropical semiarid reservoirs, shedding light on both climatic and anthropogenic influences on water resources.

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Long-term variations of water quality and nutrient load inputs in a large shallow lake of Yellow River Basin: Implications for lake water quality improvements

Cited by 9 publications

References 23 publications

Global Lake Health in the Anthropocene: Societal Implications and Treatment Strategies

Global Lake Health in the Anthropocene: Societal Implications and Treatment Strategies

Unraveling the rate-limiting step in microorganisms' mediation of denitrification and phosphorus absorption/transport processes in a highly regulated river-lake system

Diel and seasonal mixing patterns and water quality dynamics in a multipurpose tropical semiarid reservoir

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