Spatial and temporal characteristics of pollution loads in Tuojiang River watershed located in Sichuan Province, Southwest of China

Xiao, Yuting; Fan, Min; Yao, Jing; Liang, Xiaoying; Cai, Can; Wang, Yuanzhe; Tu, Weiguo

doi:10.1007/s10668-023-03147-7

Cited by 4 publications

(3 citation statements)

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“…Furthermore, the spatial distribution of areas with high TN and TP concentrations in the Tuojiang River closely mirrored the spatial distribution of TN and TP loading from ANPS. Past studies have consistently identified ANPS as the primary source of pollution in the TJRB [20,38]. TP and TN represent the predominant pollutants in the Tuojiang River, exerting a significant influence on water quality classification.…”

Section: Damage To Water Quality Of Tuojiang River By Anpsmentioning

confidence: 93%

“…The population residing in the TJRB accounts for 26.2% of the entire province, contributing significantly to the region's total economic output of 30.0%. Land utilization within the TJRB primarily comprises woodland and cultivated land, collectively occupying over 90% of the basin's total land area [38].…”

Section: Study Areamentioning

confidence: 99%

“…In the TJRB, industry and agriculture coexist, creating a complex economic landscape alongside significant water environmental challenges. Extensive research has been conducted on pollution sources [20] and water quality [37] in the Tuojiang River, revealing nitrogen and phosphorus areas as the main pollutants [38][39][40]. The presence of nitrogen and phosphorus not only triggers water body eutrophication but also poses a substantial threat to the well-being of residents.…”

Section: Introductionmentioning

confidence: 99%

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Nitrogen and Phosphorus Loading Characteristics of Agricultural Non-Point Sources in the Tuojiang River Basin

Fu,

Gong,

Chen

et al. 2023

Water

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Agricultural non-point source (ANPS) pollution has emerged as a significant factor influencing water quality within watersheds. Understanding the spatial distribution and composition of ANPS is crucial for effective river water quality management. Based on the statistical data of 28 districts and counties in the Tuojiang River Basin (TJRB), the load distribution characteristics of total nitrogen (TN) and total phosphorus (TP) from ANPS were studied in this work by using the pollutant discharge coefficient method. In 2018, ANPS contributed 60,888.92 tons of TN and 20,085.98 tons of TP to the TJRB. By 2019, the TN load had decreased to 57,155.44 tons, while the TP load increased to 21,659.91 tons. Spatially, TN and TP loads follow a pattern of being lowest in the upstream, intermediate in the downstream, and highest in the middle reaches. Planting sources emerged as the primary contributors to TN and TP loads from ANPS in the TJRB, accounting for 61.43% and 77.39%, respectively. Rural living sources made a lesser contribution, at 20.23% for TN and 9.15% for TP, while poultry and livestock farming sources accounted for 18.34% of TN and 13.46% of TP loads. The analysis of grey water footprint (GWF) and water pollution level (WPL) revealed that TN and TP loads continued to exert significant pressure on the TJRB’s water environment throughout the study period. These findings offer valuable insights for enhancing water quality management in the TJRB.

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Section: Damage To Water Quality Of Tuojiang River By Anpsmentioning

confidence: 93%

Section: Study Areamentioning

confidence: 99%