Implications of rainfall variability for seasonality and climate-induced risks concerning surface water quality in East Asia

Park, Ji‐Hyung; Inam, Edu; Abdullah, Mohd Harun; Agustiyani, Dwi; Duan, Lei; Hoang, Thi Thuong; Kim, Kyoung-Woong; Kim, Sang Don; Nguyen, My Hoa; Pekthong, Trai; Sao, Vibol; Antonius, Sarjiya; Savathvong, Sianouvong; Sthiannopkao, Suthipong; Syers, J. K.; Wirojanagud, Wanpen

doi:10.1016/j.jhydrol.2011.01.050

Cited by 42 publications

(24 citation statements)

References 48 publications

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“…Many streams and rivers across Asia are highly polluted by agricultural runoff and domestic and industrial wastewater, with 335 water quality often exhibiting large seasonal variations associated with regional monsoon rainfall regimes (Park et al, 2010;Park et al, 2011;Evans et al, 2012, Bhatt et al, 2014. Using AQUASTAT data, Evans et al (2012) , of which only an estimated 33-35% was treated before being discharged to streams and rivers.…”

Section: Effects Of Increasing Water Pollution In Asian River Systemsmentioning

confidence: 99%

Reviews and syntheses: Anthropogenic perturbations to carbon fluxes in Asian river systems: Concepts, emerging trends, and research challenges

Park¹,

Nayna²,

Begum³

et al. 2018

Preprint

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Abstract. Human activities are drastically altering water and material flows in river systems across Asia. These anthropogenic perturbations have rarely been linked to the carbon (C) fluxes of Asian rivers that may account for up to 40-20 50% of the global fluxes. The primary object of this review was to provide a conceptual framework for assessing human impacts on Asian river C fluxes, along with a latest update on anthropogenic alterations of riverine C fluxes, focusing on the impacts of water pollution and river impoundments on CO2 outgassing from the rivers draining South, Southeast, and East Asian regions that account for the largest fraction of river discharge and C exports from Asia and Oceania. Recent booms in dam construction across Asia have created a host of environmental problems; yet only a small number of studies have 25 explicitly investigated altered rates of greenhouse gas (GHG) emissions and organic C transport. There have been contrasting reports on impoundment effects: decreases in GHG emissions in the reservoirs exhibiting enhanced primary production vs. increased emissions from the flooded vegetation and soils in the early years following dam construction or from the impounded river reaches and downstream estuaries during the monsoon period. These contrasting results suggest that the rates of metabolic processes in the impounded and downstream reaches can greatly vary longitudinally over time, as 30 a combined result of diel shifts in the balance between autotrophy and heterotrophy, seasonal fluctuations between the dry and monsoon periods, and a long-term change from a leaky post-construction phase to a gradual C sink. Rapid pace of urbanization across southern and eastern Asian regions has dramatically increased municipal water withdrawal, generating annually 120.2 km 3 of wastewater in 24 countries, which comprises 38.6% of the global municipal wastewater production disproportionately affect the receiving river water, particularly downstream of rapidly expanding metropolitan areas, including eutrophication, increases in the amount and lability of organic C, and pulse emissions of CO2 and other greenhouse gases (GHGs). As reviewed for three representative rivers (the Ganges, Mekong, and Yellow River), the lower reaches of these rivers and their polluted tributaries tend to exhibit higher levels of organic C and the partial pressure of CO2 (pCO2) than the eutrophic reservoirs and less impacted upstream reaches. More field measurements of pCO2, together with accurate 40 flux calculations based on river-specific model parameters, are urgently required to provide more accurate estimates of GHG emissions from the Asian rivers that are now underrepresented in the global C budgets. Researchers working on individual river systems need to be linked to collaborative research networks to facilitate global synthesis of local field data. These synthesis efforts, combined with conceptual and mathematical models, will contribute to a better understanding of how anthropogenic perturbations in rapidly urb...

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Section: Effects Of Increasing Water Pollution In Asian River Systemsmentioning

confidence: 99%

Reviews and syntheses: Anthropogenic perturbations to carbon fluxes in Asian river systems: Concepts, emerging trends, and research challenges

Park¹,

Nayna²,

Begum³

et al. 2018

Preprint

Self Cite

View full text Add to dashboard Cite

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“…via rainfall runoff [3][4][5][6][7]. These can cause water pollution and eutrophication and subsequently endanger the living organisms in the water body [8][9][10][11].…”

mentioning

confidence: 99%

Influence of Rainfall on the Physicochemical Characteristics of a Tropical River in Sarawak, Malaysia

Ling

Soo

Liew

et al. 2017

Pol. J. Environ. Stud.

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“…It also is suggested that the annual monsoon flushes the Mekong river system (Park et al . ). It can be concluded that although hazardous compounds are present in areas in the Mekong Delta, none of these environmental contaminants accumulate in pangasius to concentrations that pose a safety concern.…”

Section: Resultsmentioning

confidence: 97%

Perceived versus real toxicological safety of pangasius catfish: a review modifying market perspectives

Murk

Rietjens

Bush

2016

Reviews in Aquaculture

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Mass media reports suggest that pangasius (Pangasianodon hypophthalmus) is ‘full of poison’ because it is able to survive in the ‘heavily polluted Mekong River’ and contains pesticides and veterinary treatment chemicals. However, most of these claims are not substantiated with scientific evidence. To assess the safety of pangasius consumption, a full toxicological risk assessment was performed. The results obtained were compared to toxicity claims made in a selection of media reports. Information on contaminant levels encountered in pangasius was collected from the EU Rapid Alert System for Food and Feed (RASFF) database. The toxicological risk assessments do not support any of the toxicological risks suggested in the media. Next, the maximum pangasius consumption that would be considered safe was estimated on the basis of the highest levels of the toxic contaminants reported in Vietnamese pangasius by RASFF and the safety thresholds for the contaminants. The maximum amount of the recalled fillet that could have been consumed without any adverse effects amounted to between 3.4 and 166.7 kg day−1 (lifelong for a 70 kg adult) in the case of pesticide contamination and between 0.613 and 303 kg fillet day−1 in the case of preservatives and antibiotics. It is concluded that consumption of pangasius available on the European market does not pose any concern for the health of the consumer. The analysis presented in this study illustrates that publicly available independent information could help consumers to develop their own well‐informed opinion about food safety issues.

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Implications of rainfall variability for seasonality and climate-induced risks concerning surface water quality in East Asia

Cited by 42 publications

References 48 publications

Reviews and syntheses: Anthropogenic perturbations to carbon fluxes in Asian river systems: Concepts, emerging trends, and research challenges

Reviews and syntheses: Anthropogenic perturbations to carbon fluxes in Asian river systems: Concepts, emerging trends, and research challenges

Influence of Rainfall on the Physicochemical Characteristics of a Tropical River in Sarawak, Malaysia

Perceived versus real toxicological safety of pangasius catfish: a review modifying market perspectives

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