Influences of the land use pattern on water quality in low-order streams of the Dongjiang River basin, China: A multi-scale analysis

Ding, Junhua; Jiang, Yuan; Liu, Qi; Hou, Zhaojiang; Liao, Jian-Yu; Fu, Lan; Peng, Qiuzhi

doi:10.1016/j.scitotenv.2016.01.162

Cited by 295 publications

(224 citation statements)

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“…The concentration of nitrate was high in agricultural areas, and this fact can be justified by the intensive use of fertilizers and pesticides in citrus and annual crops. The same process is reported in studies developed by Ding et al (2016) and Moruzzi et al (2012). If excess nitrate are found in the crop fields, the drained water introduces the element into the water courses (Ding et al, 2016), which will drain into other rivers and reach the São Domingos basin.…”

Section: Discussionsupporting

confidence: 70%

“…The same process is reported in studies developed by Ding et al (2016) and Moruzzi et al (2012). If excess nitrate are found in the crop fields, the drained water introduces the element into the water courses (Ding et al, 2016), which will drain into other rivers and reach the São Domingos basin. Nutrients such as nitrogen, nitrate and phosphorus are essential for plant and animal growth, but the excess of certain nutrients in water can cause a number of adverse ecological and health effects (Maucieri et al, 2014).…”

Section: Discussionsupporting

confidence: 70%

“…The structures of the basin ecosystems are interconnected between abiotic and biotic materials present in the environment. The integrated analysis in land uses and water monitoring in space (subbasins) and time (dry season and rainy season) allows to evaluate the possible degradation in water quality interrelated to land uses and soil management (Tundisi, 2008;Ding et al, 2016).…”

Section: Discussionmentioning

confidence: 99%

“…The National Environmental Council -CONAMA (Brasil, 2005), through Resolution 357/2005 establishes a classification for water bodies and provides environmental guidelines for its framework (Agência Nacional de Águas, 2005). Therefore, it is extremely important to obtain values of water quality to establish indicators that can collaborate in proposals for actions and new forms of management, and conservation of soil and water in watersheds (Bortoletto et al, 2015;Sun et al, 2016;Yan et al, 2016;Ding et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

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Effect of watershed land use on water quality: a case study in Córrego da Olaria Basin, São Paulo State, Brazil

et al. 2018

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The water quality is related to the hydrologic and limnologic properties of ground and surface water, and significant efforts have been made to monitor water sources to understand the effects of land use changes in agricultural areas, with significant socioeconomic activities. The objective of this study was to evaluate the qualitative aspects of surface water in subbasins related to land use. Samples were analyzed in terms of physical and chemical parameters on monthly discrete water quality sampling in four representative sites at first order subbasin streams, located at the Polo Regional Centro Norte, Pindorama County, State of São Paulo, Brazil. The land use classification was made by visual detection technique in a multispectral satellite data obtained from LandSat8-spectral bands of the OLI sensor. The watershed was classified into major land cover/use classes and overlay maps generated in ArcGIS 10 indicated a significant shift from natural vegetation to agriculture activities. Water quality monitoring was according to the brazilian protocol and the results were submitted to analysis of variance (ANOVA). The values obtained differ significantly at each sampling point -subbasins, reflecting the effects of land use on water quality. Soil conservation management is important to optimize soil use in order to contribute to the control of water pollution and the formulation of a public policy is necessary for the conservation of water and soil resources.Keywords: soil management, agroecosystems, land use policy. Efeito do uso do solo em sub-bacias na qualidade da água: um estudo de caso na Bacia do Córrego da Olaria, Estado de São Paulo, Brasil ResumoA qualidade da água está relacionada com as propriedades hidrológicas e limnológicas das águas subterrâneas e superficiais, e esforços significativos devem ser realizados para monitorar as nascentes no intuito de compreender os efeitos das mudanças no uso da terra em áreas agrícolas, com atividades socioeconômicas significativas. O objetivo deste estudo foi avaliar os aspectos qualitativos das águas superficiais de bacias hidrográficas e correlacionar com o uso do solo. As amostras foram analisadas em termos dos parâmetros físicos e químicos na amostragem mensal discreta da qualidade da água, em quatro locais representativos de nascentes em microbacias de primeira ordem, localizadas no Polo Regional Centro Norte, Pindorama, Estado de São Paulo, Brasil. A classificação do uso do solo foi feita por técnica de detecção visual em uma imagem multiespectral de satélite LandSat8-bandas espectrais, sensor OLI. O uso do solo foi classificado nas principais classes de uso e os mapas de sobreposição gerados no ArcGIS 10 indicaram uma mudança significativa da vegetação natural para as atividades agrícolas. O monitoramento da qualidade da água

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Section: Discussionsupporting

confidence: 70%

Section: Discussionsupporting

confidence: 70%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of watershed land use on water quality: a case study in Córrego da Olaria Basin, São Paulo State, Brazil

et al. 2018

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“…More importantly, the Dongjiang River is responsible for supplying drinking water to the Pearl River Delta region and Hong Kong. In recent years, the degradation of the water quality of the Dongjiang River caused widespread concern [12][13][14][15]. Nitrogen and phosphorus concentrations were found at high levels in the many tributaries, giving rise to the possibility of a harmful algae bloom [16].…”

Section: Introductionmentioning

confidence: 99%

Impacts of Environmental Variables on a Phytoplankton Community: A Case Study of the Tributaries of a Subtropical River, Southern China

Hou

Jiang

Liu

et al. 2018

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Abstract:The phytoplankton community in the river is closely related to the location of the river and the impact of human activities. To summarize the patterns of phytoplankton community changes in rivers and to analyze the reasons for these patterns and differences, we sampled the three tributaries of the Dongjiang River at different latitudes in the dry and rainy season for three years. The results showed that the three rivers were mesotrophic, lightly eutrophic and moderately eutrophic respectively. From the south to the north, the water temperature and nutrition showed an increasing trend. In two different seasons, the differences in the water temperature and dissolved oxygen were clear. In the dry season, results of the multidimensional scaling (MDS) analysis indicated that the phytoplankton community structures in the Li River and Qiuxiang River were similar. Regardless of the number of species, the cell abundance or the dominance index, Bacillariophyta were found to be dominant. Chlorophyta was dominant in the Danshui River. In the rainy season, Bacillariophyta, Bacillariophyta-Chlorophyta and Chlorophyta-Cyanophyta became the dominant types in the Li River, Qiuxiang River and Danshui River, respectively. These different patterns in phytoplankton community variation were affected by both the water quality and temperature.

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Impacts of land use and landscape pattern on water quality at multiple spatial scales in a subtropical large river

et al. 2022

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The coupling between land use/landscape pattern and water quality in river systems varies across different spatial and temporal scales. It is important to understand the association between water quality and land use/landscape pattern across different spatial and temporal scales for the protection of water resources. Here, we measured seasonal water quality at 12 sub‐basins in the upper reaches of the Han River (UHR) between 2010 and 2018. We conducted factor analysis and redundancy analysis to determine the links between land use and water quality at multiple spatial scales and to identify the main factors influencing water quality. We found that the concentration of nutrients, including total nitrogen, total phosphorus, nitrate‐N and ammonium‐N, was higher during the wet season than the dry season. Total nitrogen was the main driver of nutrient pollution in the UHR, whereas total phosphorus was identified as another potential nutrient pollutant. We also found that water quality parameters were more strongly related to land use types during the wet season than the dry season. Croplands and urban lands increased phosphorus concentrations of river water, whereas forest and grasslands decreased the nitrogen concentrations of river water at the sub‐basin scale. Land use at the riparian zone scales better explained variations in water quality than land use at sub‐basin scales. The explained variations in landscape metrics were generally higher during the dry season than the wet season. The largest patch index and Shannon's diversity index were the main predictors of river water quality in the UHR.

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Influences of the land use pattern on water quality in low-order streams of the Dongjiang River basin, China: A multi-scale analysis

Cited by 295 publications

References 50 publications

Effect of watershed land use on water quality: a case study in Córrego da Olaria Basin, São Paulo State, Brazil

Effect of watershed land use on water quality: a case study in Córrego da Olaria Basin, São Paulo State, Brazil

Impacts of Environmental Variables on a Phytoplankton Community: A Case Study of the Tributaries of a Subtropical River, Southern China

Impacts of land use and landscape pattern on water quality at multiple spatial scales in a subtropical large river

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