The relationship of climatic and hydrological parameters to surface water quality in the lower Mekong River

Prathumratana, Lunchakorn; Sthiannopkao, Suthipong; Kim, Kyoung-Woong

doi:10.1016/j.envint.2007.10.011

Cited by 173 publications

(113 citation statements)

References 12 publications

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“…Floods and droughts can also modify water quality by diluting or concentrating dissolved substances. For low river flow rates, the main effect on water quality is due to increases of temperature and concentration of dissolved substances in water, but a decrease of dissolved oxygen concentration (Prathumratana et al 2008;Van Vliet and Zwolsman 2008).…”

Section: Effect On Water Quality By Anthropogenic Andmentioning

confidence: 99%

“…However, natural waters contain a variety of contaminants arising from erosion, leaching and weathering processes; such contaminants can only have their concentrations reduced by normal water and wastewater treatment processes, so their presence in a particular water source may limit its use (Nemerow 1985;Tebbutt 1992) Floods and droughts may bring about changes in water quality through dilution or concentration of dissolved substances. Where there are low river flow rates, the main effect on water quality is when there is a temperature increase, increased concentration of dissolved substances and decreased concentration of dissolved oxygen (Prathumratana et al 2008;Van Vliet and Zwolsman 2008).…”

Section: Natural Factors Affecting Water Quality In Ruralmentioning

confidence: 99%

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Influences of natural and anthropogenic factors on surface and groundwater quality in rural and urban areas

Khatri¹,

Tyagi²

2014

Frontiers in Life Science

681

283

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Although water constitutes 71% of the earth's surface, only 0.3% of it is available as fresh water for human use. Moreover, the quality of fresh water in ground and surface systems is of great concern, as potable water needs to have appropriate mineral content. Ground and surface water quality in rural and urban environments is affected by both natural processes and anthropogenic influences. Because of this, water is becoming scarcer as the population increases across the world. Natural processes leading to changes in water quality include weathering of rocks, evapotranspiration, depositions due to wind, leaching from soil, run-off due to hydrological factors, and biological processes in the aquatic environment. These natural processes cause changes in the pH and alkalinity of the water, and also phosphorus loading, increase in fluoride content and high concentrations of sulphates. Anthropogenic factors affecting water quality include impacts due to agriculture, use of fertilizers, manures and pesticides, animal husbandry activities, inefficient irrigation practices, deforestation of woods, aquaculture, pollution due to industrial effluents and domestic sewage, mining, and recreational activities. These anthropogenic influences cause elevated concentrations of heavy metals, mercury, coliforms and nutrient loads. This paper studies the effects of natural processes and human influences in rural and urban aquatic systems. Pollution due to environmental parameters such as heavy metal pollution, heavy metals and bacterial and pathogenic contamination of both urban and rural areas is discussed in detail.

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Section: Effect On Water Quality By Anthropogenic Andmentioning

confidence: 99%

Section: Natural Factors Affecting Water Quality In Ruralmentioning

confidence: 99%

Influences of natural and anthropogenic factors on surface and groundwater quality in rural and urban areas

Khatri¹,

Tyagi²

2014

Frontiers in Life Science

681

283

View full text Add to dashboard Cite

show abstract

“…In dry season, reduction of river flow and rainfall will lead to more extensive and serious sea water intrusion [23], which will result in higher content of mineral ions and will threat the safety of drinking water. Meanwhile, the dilution potential of wastewater from industries and domestic sewage will be reduced such that more pollutants will stay in the receiving water.…”

Section: Measures For Water Quality Managementmentioning

confidence: 99%

“…The reduction of stream flow might lead to an increase of contaminant concentration. Prathumratana et al [23] presented that there was positive correlations between hydrological parameters (such as precipitation, mean water level, stream flow) and some water quality parameters (such as COD Mn , BOD 5 , NH þ 4 ). In general, the concentrations of pollutants in surface waters are significantly higher during the dry season than that during the wet season, which is due to the dilution by large amount of rainfall and stream flow from upstream in the wet season [12,24].…”

Section: Introductionmentioning

confidence: 99%

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Water Quality Management Based on Division of Dry and Wet Seasons in Pearl River Delta, China

Fan

Cui

Zhang

et al. 2012

CLEAN Soil Air Water

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In the Pearl River Delta (PRD), river water quality deteriorates continually due to the population increase and ongoing industrialization and urbanization. In this study, a water quality management paradigm based on the seasonal variation is proposed. For better exploring the seasonal change of water quality, wavelet analysis was used to analyze the division of dry and wet seasons in the PRD during 1952PRD during -2009. Then water quality seasonal variation in 2008 and relevant impact factors were analyzed by multivariate statistic methods as a case to make some management measures. The results show that there are some differences of dry and wet seasons division among different years. Wet season mainly appear from April to September, which occupy the largest proportion among the 58 years (about 70%) and then followed by the wet season from May to October (about 13.8% of the total years). As to the water quality of 2008, significant differences exist between dry and wet seasons for 17 water quality parameters except TP, NO À 3 , Fe 2þ , and Zn 2þ . Levels of parameters pH, EC, COD Mn , BOD 5 , NH þ 4 , SO 2À 4 , and Cl À in dry season are much higher than those in wet season. In dry season the variations of river water quality are mainly influenced by domestic sewage, industrial effluents, and salt water intrusion. While in wet season, except the aforementioned pollution sources, drainages from cultivated land and livestock farm are also the main factors influencing water pollution. Thus, water quality management measures are proposed in dry and wet seasons, respectively. The results obtained from this study would further facilitate water quality protection and water resources management in the PRD.

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Climate change and freshwater fisheries

Harrod

2015

Freshwater Fisheries Ecology

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Climate change is among the most serious environmental challenge facing humanity and the ecosystems that provide the goods and services on which it relies. Climate change has had a major historical influence on global biodiversity and will continue to impact the structure and function of natural ecosystems, including the provision of natural services such as fisheries. Freshwater fishery professionals (e.g. fishery managers, fish biologists, fishery scientists and fishers) need to be informed regarding the likely impacts of climate change. Written for such an audience, this chapter reviews the drivers of climatic change and the means by which its impacts are predicted. It details observed and future predicted effects of climate change on freshwater ecosystems across Arctic, temperate and tropical climatic zones and highlights those areas where data are currently limiting our understanding of how and if climate change is affecting freshwater fisheries. Observed and predicted consequences of climatic change on the ecology of freshwater fishes are examined at different levels of biological organization, including individual, population, community and ecosystem levels, and future scenarios are discussed. The chapter examines the likely impacts of such changes on the exploitation and management of freshwater fishes across recreational, artisanal and commercial fishery sectors, including observations on the vulnerability of fishers themselves to climate change.

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The relationship of climatic and hydrological parameters to surface water quality in the lower Mekong River

Cited by 173 publications

References 12 publications

Influences of natural and anthropogenic factors on surface and groundwater quality in rural and urban areas

Influences of natural and anthropogenic factors on surface and groundwater quality in rural and urban areas

Water Quality Management Based on Division of Dry and Wet Seasons in Pearl River Delta, China

Climate change and freshwater fisheries

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