Recent water quality trends in a typical semi-arid river with a sharp decrease in streamflow and construction of sewage treatment plants

Cheng, Peng; Li, Xuyong; Su, Jianguo; Hao, Shaonan

doi:10.1088/1748-9326/aa9df2

Cited by 21 publications

(8 citation statements)

References 44 publications

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“…The STL method was applied to explore the long-term and seasonality trend of monthly TN and TP concentration at two stations. The STL method is a graphing technique based on various local smoothing techniques and has been widely applied [13]. Using this method, we can decompose a time series into three components as…”

Section: Methodsmentioning

confidence: 99%

“…Deciphering these confounding factors often necessitates trend analysis [11,12]. Seasonal trend decomposition using loess (STL), a graphing technique, may be a powerful diagnostic tool [13,14]. It is flexible enough to reveal a much wider range of trend patterns and could provide visual results with seasonal interaction [13].…”

Section: Introductionmentioning

confidence: 99%

“…Seasonal trend decomposition using loess (STL), a graphing technique, may be a powerful diagnostic tool [13,14]. It is flexible enough to reveal a much wider range of trend patterns and could provide visual results with seasonal interaction [13]. Furthermore, generalized additive models (GAMs) can produce regression functions that can be statistically described and compared [15,16].…”

Section: Introductionmentioning

confidence: 99%

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The Long-Term and Retention Impacts of the Intervention Policy for Cage Aquaculture on the Reservoir Water Qualities in Northern China

Kang

Yin

Cui

et al. 2020

Water

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To ensure the safety of the water supply of the Panjiakou reservoir, in 2016, the Chinese central government comprehensively banned the fishing cage culture that had lasted for almost 30 years. However, the long-term effects and retention impacts of the government’s mandatory intervention on the reservoir water quality are unknown. To determine the reservoir water quality, we employed statistical methods along with the mathematical model to investigate the internal relationship since the construction of the reservoir. We applied seasonal trend decomposition using loess (STL) to explore the long-term and seasonality trend of monthly total nitrogen (TN) and total phosphorous (TP). To separate the impact of upstream water quality changes from cage culture on reservoir water quality, we employed generalized additive models (GAMs). We created a model, the LAKE2K model, to investigate the internal sources of the sediment that accumulated during the aquaculture period and its retardant effect. The results revealed that the concentration of upstream TN was more affected by non-point sources than by TP. The long-term policy of encouraging aquaculture has greatly contributed to the increase in the reservoir TP concentration rather than an increase in TN; the prohibition of cage aquaculture has resulted in a sharp drop in TP. After the ban, the sediment became the main source of TP. We suspect that the TP concentration of the reservoir and sediment will decrease gradually until a new equilibrium is reached within 10 years. This study offers lake managers an opportunity to increase their insight into the interaction of management measures with water quality and provides valuable information for the natural recovery of the eutrophic system.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The Long-Term and Retention Impacts of the Intervention Policy for Cage Aquaculture on the Reservoir Water Qualities in Northern China

Kang

Yin

Cui

et al. 2020

Water

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“…The regulation of water environment improvement of urban river network is very complicated. It is needed to adopt comprehensive regulation measures including surface runoff pollution control [11], sewage collection and treatment [12], non-point source pollution control [13] and water supply regulation [6]. In addition, it is necessary to control population growth and implement strict water conservation to reduce and control domestic water pollutants from the source [14].…”

Section: Introductionmentioning

confidence: 99%

Study on Technical Schemes for Major Pollutants Emission Reduction in Beijing North Canal River Basin Based on Watershed Water Quality Target Management

Wang¹,

Yan²,

Pan³

et al. 2019

JWARP

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Water quality target management in watershed is the fundamental choice of city rivers suffering both serious pollution and severe water shortage. In this study, we performed a case study regarding river pollution control plan based on water quality target management in the North Canal River catchment of Beijing section, in order to obtain effective water quality improvement programs. The ammonia nitrogen (NH 3-N) and chemical oxygen demand (COD) were taken as the main controlling pollutants. Water quality targets and basic water quality improvement scenarios were set up considering different intensities of population regulation scenarios and gradually strengthening emission control measures. The MIKE11 model was adopted to simulate the effects of a range of water quality improvement scenarios. Results indicated that the basic scenarios could dramatically improve the surface water environment. However, additional intensive and combined measure programs should be implemented to ensure that the water quality would basically meet the targets of corresponding water function zones. The results highlight the need to implement water conservation in water shortage urban river basin and show the importance of enhancing drainage communication and conducting ecological water replenishment in such kind basins. It is expected to provide a reference for the water environment management practice of other metropolis in the world facing both crisis of water resource shortage and water environment pollution.

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“…6 期邵志江等：永定河上游主要河流地表水水质时空变化特征利用类型的变化密切相关 [9] ，枯水期主要污染物来源于农业面源污染、污水处理厂点源和农村生活污水等 [7] 。高星琪等 [10] 基于多元统计分析结果表明洋河和桑干河仍为重点治理河流。此外，研究尚未发现有学者针对永定河主要污染物入库通量和贡献率研究进行报道 [16,17] 测指标共 28 项，结合近十几年张家口市环境公报结果显示，主要污染物指标为溶解氧 (DO) 、氨氮 (NH4 + -N) 、高锰酸盐指数、总磷 (TP) 、化学需氧量 (COD) 、生化需氧量和氟化物 (F -1 ) ，因此选择这七个水质指标进行分析 [5,[7][8][9][10][11]…”

unclassified

Spatiotemporal variations of surface water quality of main rivers in the upper reaches of Yongding River

SHAO¹,

Zheng²,

Wang³

2020

JOURNAL OF NATURAL RESOURCES

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Recent water quality trends in a typical semi-arid river with a sharp decrease in streamflow and construction of sewage treatment plants

Cited by 21 publications

References 44 publications

The Long-Term and Retention Impacts of the Intervention Policy for Cage Aquaculture on the Reservoir Water Qualities in Northern China

The Long-Term and Retention Impacts of the Intervention Policy for Cage Aquaculture on the Reservoir Water Qualities in Northern China

Study on Technical Schemes for Major Pollutants Emission Reduction in Beijing North Canal River Basin Based on Watershed Water Quality Target Management

Spatiotemporal variations of surface water quality of main rivers in the upper reaches of Yongding River

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