Non-point source pollution dynamics under long-term agricultural development and relationship with landscape dynamics

Ouyang, Wei; Song, Kun; Wang, Xuelei; Hao, Fang

doi:10.1016/j.ecolind.2014.05.025

Cited by 76 publications

(20 citation statements)

References 47 publications

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“…frequency (Fouz et al, 2009), and land use type (Ouyang et al 2014) and changed with them. Thus, NPSP in different watershed has its specific spatial distributions and temporal trends.…”

Section: Introductionmentioning

confidence: 96%

Runoff characteristics and non-point source pollution analysis in the Taihu Lake Basin: a case study of the town of Xueyan, China

Zhu

Sun

et al. 2015

Environ Sci Pollut Res

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Non-point source pollution is a significant environmental issue in small watersheds in China. To study the effects of rainfall on pollutants transported by runoff, rainfall was monitored in Xueyan town in the Taihu Lake Basin (TLB) for over 12 consecutive months. The concentrations of different forms of nitrogen (N) and phosphorus (P), and chemical oxygen demand, were monitored in runoff and river water across different land use types. The results indicated that pollutant loads were highly variable. Most N losses due to runoff were found around industrial areas (printing factories), while residential areas exhibited the lowest nitrogen losses through runoff. Nitrate nitrogen (NO3-N) and ammonia nitrogen (NH4-N) were the dominant forms of soluble N around printing factories and hotels, respectively. The levels of N in river water were stable prior to the generation of runoff from a rainfall event, after which they were positively correlated to rainfall intensity. In addition, three sites with different areas were selected for a case study to analyze trends in pollutant levels during two rainfall events, using the AnnAGNPS model. The modeled results generally agreed with the observed data, which suggests that AnnAGNPS can be used successfully for modeling runoff nutrient loading in this region. The conclusions of this study provide important information on controlling non-point source pollution in TLB.

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“…frequency (Fouz et al, 2009), and land use type (Ouyang et al 2014) and changed with them. Thus, NPSP in different watershed has its specific spatial distributions and temporal trends.…”

Section: Introductionmentioning

confidence: 96%

Runoff characteristics and non-point source pollution analysis in the Taihu Lake Basin: a case study of the town of Xueyan, China

Zhu

Sun

et al. 2015

Environ Sci Pollut Res

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“…The high precipitation, the bare soils and the crop techniques on steep slopes with the crop arrangement up to 15 m in length favored the erosion in this Andean basin (Otero et al 2011, Mosquera et al 2014. Also forest fragmentation generated more vulnerability to erosion and affected the hydrologic cycle regulation as is widely explained in researches, the soil exploitation increased the concentration of pollutants in water sources, limits the water supply and alters the biodiversity in the basin (Boelens 2012, Ouyang et al 2014.…”

Section: Human Activities and Water Qualitymentioning

confidence: 99%

Effects of Productive Activities on the Water Quality for Human Consumption in an Andean Basin, a Case Study

Ruiz

Idrobo

Sarmiento

et al. 2017

Rev. Int. Contam. Ambie.

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Productive activities such as agriculture and livestock have transformed the Andean basins in South America. In accordance with this statement, the objective of this study was to assess the water quality of "Las Piedras" river located in an Andean basin with 6626 ha in Colombian Highlands. This study analyzed nutrient inputs from agricultural production, spatial crops distribution, human activities and their influence on the ecological state of the river. The evaluation integrated physicochemical and biological parameters in the indexes of water quality, pollution and the aquatic macroinvertebrates community. Results showed that aggregated crop fields occupy 25.2 % in the basin and the biological water quality through the Biological Monitoring Working Party (BMWP) index denotes the presence of tolerant-pollution organisms, additionally the biodiversity was low (Shannon H´1.1). The water quality in the river satisfies the Colombian regulation criteria for human consumption, even higher concentrations of nutrients in the lower area with 2.20 mg/L nitrates and 1.49 mg/L of phosphates, besides the loss of nutrients by runoff, which was 2.57 mg/L nitrates in the middle area and 0.18 mg/L phosphates in the upper area. In this sense, the nutrient concentration input increases toward the lower area of the basin because of the crop distribution. The agricultural land use modified the hydrological ecosystem services by decreasing the basin water regulatory capacity and nutrients input to the main stream.Palabras clave: contaminación hídrica, agricultura, distribución espacial de los cultivos, biodiversidad, agua potable RESUMENLas actividades productivas como la agricultura y la ganadería han transformado las cuencas andinas de América del Sur. El objetivo de este estudio fue evaluar la calidad del agua en la cuenca del río Las Piedras (6626 ha), localizada en la alta montaña colombiana. Se analizaron los aportes de nutrientes a partir de la producción agrícola, distribución espacial de cultivos, actividades humanas y su influencia en el estado ecológico del río. La evaluación integró los parámetros físicos, químicos y biológicos en índices de calidad del agua, de contaminación y de macroinvertebrados acuáticos. Los resultados mostraron que los cultivos ocupan el 25.2 % de la cuenca, la calidad biológica del agua según el 362índice del Grupo de Trabajo de Monitoreo Biológico (BMWP, por sus siglas en inglés) evidenció la presencia de organismos tolerantes a la contaminación y baja biodiversidad (Shannon H' 1.1). La calidad del agua es apta para consumo humano según los estándares establecidos por la normatividad Colombiana. Sin embargo, se encontraron altas concentraciones de nutrientes en la zona baja del río con 2.20 mg/L de nitratos y 1.49 mg/L de fosfatos, adicionalmente los aportes de nutrientes en escorrentía superficial fueron de 2.57 mg/L de nitratos en la zona media y 0.18 mg/L de fosfatos en la zona alta. En este sentido, se observó que el ingreso de nutrientes aumenta hacia la zona baja de la cuenca deb...

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“…predominantly used to study non-point source pollution from agricultural fields (Zhang et al, 2013;Cerro et al, 2014;Jiang et al, 2014;Ouyang et al, 2014;Zhang et al, 2014) despite its capabilities of incorporating a variety of pollution sources such as point sources and septic tanks (Oliver et al, 2014). The ignorance of the point sources and septic tanks in the process-based models may lead to the overestimation of the relative contributions from diffusive sources such as agriculture and the disproportional targeting of potential pollution sources (Withers et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Spatiotemporal patterns and source attribution of nitrogen load in a river basin with complex pollution sources

Yang

et al. 2016

Water Research

102

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Environmental problems such as eutrophication caused by excessive nutrient discharge are global challenges. There are complex pollution sources of nitrogen (N) discharge in many river basins worldwide. Knowledge of its pollution sources and their respective load contributions is essential to developing effective N pollution control strategies. N loads from all known anthropogenic pollution sources in the Upper Huai River basin of China were simulated with the process-based SWAT (Soil and Water Assessment Tool) model. The performances of SWAT driven by daily and hourly rainfall inputs were assessed and it was found that the one driven by hourly rainfall outperformed the one driven by daily rainfall in simulating both total nitrogen (TN) and ammonia nitrogen (NH 4-N) loads. The hourly SWAT model was hence used to examine the spatiotemporal patterns of TN and NH 4-N loads and their source attributions. TN load exhibited significant seasonal variations with the largest in summer and the smallest in spring. Despite its declining proportion of contribution downstream, crop production remained

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Non-point source pollution dynamics under long-term agricultural development and relationship with landscape dynamics

Cited by 76 publications

References 47 publications

Runoff characteristics and non-point source pollution analysis in the Taihu Lake Basin: a case study of the town of Xueyan, China

Runoff characteristics and non-point source pollution analysis in the Taihu Lake Basin: a case study of the town of Xueyan, China

Effects of Productive Activities on the Water Quality for Human Consumption in an Andean Basin, a Case Study

Spatiotemporal patterns and source attribution of nitrogen load in a river basin with complex pollution sources

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