Assessing the effects of landscape pattern on river water quality at multiple scales: A case study of the Dongjiang River watershed, China

Zhou, Ting; Wu, Jianguo; Shaolin, Peng

doi:10.1016/j.ecolind.2012.03.013

Cited by 221 publications

(113 citation statements)

References 34 publications

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“…Focusing only on specific-sites and lacking a regional watershed perspective may be the causes of invalid river management practices in the study area during the past several decades [29]. Our findings indicate that urban rather than agricultural land use primarily affects water quality in the Dongjiang River basin.…”

Section: Management Implication For the Dongjiang River Basinmentioning

confidence: 69%

“…In recent years, concerns have grown regarding the deterioration in water quality in the basin [27]. Several studies have explored the relationship between land use and water quality in a few streams or in single season in Dongjiang River [28,29]. However, knowledge in such relationships at a basin-wide scale across seasons is still lacking due to the large area and monitoring difficulties.…”

mentioning

confidence: 99%

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Impacts of Land Use on Surface Water Quality in a Subtropical River Basin: A Case Study of the Dongjiang River Basin, Southeastern China

Ding

Jiang

Fu³

et al. 2015

Water

158

103

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Abstract:Understanding the relationship between land use and surface water quality is necessary for effective water management. We estimated the impacts of catchment-wide land use on water quality during the dry and rainy seasons in the Dongjiang River basin, using remote sensing, geographic information systems and multivariate statistical techniques. The results showed that the 83 sites can be divided into three groups representing different land use types: forest, agriculture and urban. Water quality parameters exhibited significant variations between the urban-dominated and forest-dominated sites. The proportion of forested land was positively associated with dissolved oxygen concentration but negatively associated with water temperature, electrical conductivity, permanganate index, total phosphorus, total nitrogen, ammonia nitrogen, nitrate nitrogen and chlorophyll-a. The proportion of urban land was strongly positively associated with total nitrogen and ammonia nitrogen concentrations. Forested and urban land use had stronger impacts on water quality in the dry season than in the rainy OPEN ACCESSWater 2015, 7 4428 season. However, agricultural land use did not have a significant impact on water quality. Our study indicates that urban land use was the key factor affecting water quality change, and limiting point-source waste discharge in urban areas during the dry season would be critical for improving water quality in the study area.

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Section: Management Implication For the Dongjiang River Basinmentioning

confidence: 69%

mentioning

confidence: 99%

Impacts of Land Use on Surface Water Quality in a Subtropical River Basin: A Case Study of the Dongjiang River Basin, Southeastern China

Ding

Jiang

Fu³

et al. 2015

Water

158

103

View full text Add to dashboard Cite

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“…Human-induced driving forces, in particular, are human activities and economic sectors responsible for pressures acting on an ecosystem (Elliott, 2002), whose identification is essential to evaluate the current and the potential impacts of human activity on the status of surface waters (Carey et al, 2011;Lowicki, 2012;Zhou et al, 2012). Moreover, the identification and understanding of those driving forces are essential to the design of interventions that enhance positive and minimize negative impacts on the ecosystem.…”

Section: Introductionmentioning

confidence: 99%

Systematic processes of land use/land cover change to identify relevant driving forces: Implications on water quality

Teixeira

Marques

2014

Science of The Total Environment

118

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• LULC and LULC changes are important drivers of water condition.• We identified strong signals of systematic transitions.• Consistency and magnitude of systematic transitions reveal processes of LULC change.• Processes of LULC change reveal important drivers of water condition.• Relevant drivers reveal potential pressures linked to the process of transition. Land use and land cover (LULC) are driving forces that potentially exert pressures on water bodies, which are most commonly quantified by simply obtained aggregated data. However, this is insufficient to detect the drivers that arise from the landscape change itself. To achieve this objective one must distinguish between random and systematic transitions and identify the transitions that show strong signals of change, since these will make it possible to identify the transitions that have evolved due to population growth, industrial expansion and/or changes in land management policies. Our goal is to describe a method to characterize driving forces both from LULC and dominant LULC changes, recognizing that the presence of certain LULC classes as well as the processes of transition to other uses are both sources of stress with potential effects on the condition of water bodies. This paper first quantifies the driving forces from LULC and also from processes of LULC change for three nested regions within the Mondego river basin in 1990, 2000 and 2006. It then discusses the implications for the environmental water body condition and management policies. The fingerprint left on the landscape by some of the dominant changes found, such as urbanization and industrial expansion, is, as expected, low due to their proportion in the geographic regions under study, yet their magnitude of change and consistency reveal strong signals of change regarding the pressures acting in the system. Assessing dominant LULC changes is vital for a comprehensive study of driving forces with potential impacts on water condition.

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“…China is a country with a rapid economic development and a fast growing population [13][14][15][16][17][18][19]. For example, the number of cities in China more than quadrupled and the urban population increased by over 20 times between the 1950s and 2008 [17].…”

Section: Introductionmentioning

confidence: 99%

Modelling nitrogen and phosphorus export by the Pearl River in China 1970–2050

Strokal

Kroeze

et al. 2014

WIT Transactions on Ecology and the Environment

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China is a country with a rapid economic development and fast population growth. This is causing environmental pollution. Eutrophication has been a problem in the coastal waters of southern China since the 1970s. This is a result of increased nitrogen (N) and phosphorus (P) inputs from rivers such as the Pearl River (Zhujiang). The Pearl River is the third largest river in China. It serves as an important water supplier for irrigation and human water consumption. Human activities on land, however, have increased the nutrient content of the Pearl River water considerably. The objective of our study is to quantify the relative contribution of the anthropogenic and non-anthropogenic sources of dissolved inorganic N and P export by the Pearl River to coastal seas. We describe a method to model dissolved N and P export at the sub-basin scale. Results indicate that in 2000 about 90% of the dissolved N and P inputs exported by the Pearl River to the coastal waters were from anthropogenic sources (e.g. agriculture, sewage, and biological N 2 -fixation by agricultural crops). In the future the relative share of anthropogenic sources may increase. We show that nutrient inputs from land to rivers vary among sub-basins. We conclude that modelling and scenario analyses may support the formulation of effective strategies to reduce N and P export by the Pearl River, and thus to effective management of coastal eutrophication in the coming decades.

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Assessing the effects of landscape pattern on river water quality at multiple scales: A case study of the Dongjiang River watershed, China

Cited by 221 publications

References 34 publications

Impacts of Land Use on Surface Water Quality in a Subtropical River Basin: A Case Study of the Dongjiang River Basin, Southeastern China

Impacts of Land Use on Surface Water Quality in a Subtropical River Basin: A Case Study of the Dongjiang River Basin, Southeastern China

Systematic processes of land use/land cover change to identify relevant driving forces: Implications on water quality

Modelling nitrogen and phosphorus export by the Pearl River in China 1970–2050

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