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

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

doi:10.1016/j.jhydrol.2011.01.050

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

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

Department of Environmental Science & Engineering

Research output: Contribution to journal › Article › peer-review

42 Scopus citations

Abstract

Water resources in East Asia are considered particularly vulnerable to climate variability and extremes due to strong hydrologic variability inherent in the monsoon climate and rising water demand resulting from rapid economic growth. To obtain a better understanding of the current status and climate-induced risks concerning surface water quality in East Asia, seasonal and spatial variations in surface water quality were compared among 11 watersheds in eight countries during typical dry and wet periods from 2006 to 2008. While concentrations of dissolved ions tended to be higher during dry periods, concentrations of suspended sediments and dissolved organic matter were significantly higher during wet periods at most sampling locations. Metals with low solubility showed higher total concentrations during wet periods and had strong positive relationships with suspended sediment concentrations. Metals with high partitioning into the dissolved phase exhibited higher concentrations during dry periods at many sites. Seasonal and spatial patterns were distinct along the Lower Mekong River, including much higher monsoonal concentrations of sediment-associated metals and relatively high dry-season concentrations of dissolved As along upper reaches. The results suggest that rainfall variability is crucial in understanding seasonality and climate-induced risks concerning surface water quality in East Asia.

Original language	English
Pages (from-to)	323-332
Number of pages	10
Journal	Journal of Hydrology
Volume	400
Issue number	3-4
DOIs	https://doi.org/10.1016/j.jhydrol.2011.01.050
State	Published - 11 Apr 2011

Bibliographical note

Funding Information:
Water sampling campaigns in eight countries were conducted as part of an international research project funded by the APN (Asia-Pacific Network for Global Change Research) through START (ARCP2008-04CMY-Park), with additional funding provided by the UNU & GIST Joint Programme on Science and Technology for Sustainability. The work conducted in Korea by JH Park was supported by Korea Forest Service (‘Forest Science & Technology Project’ S210810L010110) and the National Research Foundation of Korea funded by the Korea Government (ERC 2009-0093460; KRF-2007-313-F00033). We thank Prof. Jung-Soo Lee for drawing the site map, Sei-Young Kim for ICP-MS analysis, and numerous other students and research staff for their assistance in sample collection and analysis. Part of chemical analysis was conducted at the Central Laboratory of Kangwon National University.

Keywords

East Asia
Mekong River
Rainfall variability
Surface water quality
Suspended sediments
Trace metals

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10.1016/j.jhydrol.2011.01.050

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Park, J. H., Inam, E., Abdullah, M. H., Agustiyani, D., Duan, L., Hoang, T. T., Kim, K. W., Kim, S. D., Nguyen, M. H., Pekthong, T., Sao, V., Sarjiya, A., Savathvong, S., Sthiannopkao, S., Keith Syers, J., & Wirojanagud, W. (2011). Implications of rainfall variability for seasonality and climate-induced risks concerning surface water quality in East Asia. Journal of Hydrology, 400(3-4), 323-332. https://doi.org/10.1016/j.jhydrol.2011.01.050

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

abstract = "Water resources in East Asia are considered particularly vulnerable to climate variability and extremes due to strong hydrologic variability inherent in the monsoon climate and rising water demand resulting from rapid economic growth. To obtain a better understanding of the current status and climate-induced risks concerning surface water quality in East Asia, seasonal and spatial variations in surface water quality were compared among 11 watersheds in eight countries during typical dry and wet periods from 2006 to 2008. While concentrations of dissolved ions tended to be higher during dry periods, concentrations of suspended sediments and dissolved organic matter were significantly higher during wet periods at most sampling locations. Metals with low solubility showed higher total concentrations during wet periods and had strong positive relationships with suspended sediment concentrations. Metals with high partitioning into the dissolved phase exhibited higher concentrations during dry periods at many sites. Seasonal and spatial patterns were distinct along the Lower Mekong River, including much higher monsoonal concentrations of sediment-associated metals and relatively high dry-season concentrations of dissolved As along upper reaches. The results suggest that rainfall variability is crucial in understanding seasonality and climate-induced risks concerning surface water quality in East Asia.",

keywords = "East Asia, Mekong River, Rainfall variability, Surface water quality, Suspended sediments, Trace metals",

author = "Park, {Ji Hyung} and Edu Inam and Abdullah, {Mohd Harun} and Dwi Agustiyani and Lei Duan and Hoang, {Thi Thuong} and Kim, {Kyoung Woong} and Kim, {Sang Don} and Nguyen, {My Hoa} and Trai Pekthong and Vibol Sao and Antonius Sarjiya and Sianouvong Savathvong and Suthipong Sthiannopkao and {Keith Syers}, J. and Wanpen Wirojanagud",

note = "Funding Information: Water sampling campaigns in eight countries were conducted as part of an international research project funded by the APN (Asia-Pacific Network for Global Change Research) through START (ARCP2008-04CMY-Park), with additional funding provided by the UNU & GIST Joint Programme on Science and Technology for Sustainability. The work conducted in Korea by JH Park was supported by Korea Forest Service ({\textquoteleft}Forest Science & Technology Project{\textquoteright} S210810L010110) and the National Research Foundation of Korea funded by the Korea Government (ERC 2009-0093460; KRF-2007-313-F00033). We thank Prof. Jung-Soo Lee for drawing the site map, Sei-Young Kim for ICP-MS analysis, and numerous other students and research staff for their assistance in sample collection and analysis. Part of chemical analysis was conducted at the Central Laboratory of Kangwon National University. ",

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Park, JH, Inam, E, Abdullah, MH, Agustiyani, D, Duan, L, Hoang, TT, Kim, KW, Kim, SD, Nguyen, MH, Pekthong, T, Sao, V, Sarjiya, A, Savathvong, S, Sthiannopkao, S, Keith Syers, J & Wirojanagud, W 2011, 'Implications of rainfall variability for seasonality and climate-induced risks concerning surface water quality in East Asia', Journal of Hydrology, vol. 400, no. 3-4, pp. 323-332. https://doi.org/10.1016/j.jhydrol.2011.01.050

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AU - Park, Ji Hyung

AU - Inam, Edu

AU - Abdullah, Mohd Harun

AU - Agustiyani, Dwi

AU - Duan, Lei

AU - Hoang, Thi Thuong

AU - Kim, Kyoung Woong

AU - Kim, Sang Don

AU - Nguyen, My Hoa

AU - Pekthong, Trai

AU - Sao, Vibol

AU - Sarjiya, Antonius

AU - Savathvong, Sianouvong

AU - Sthiannopkao, Suthipong

AU - Keith Syers, J.

AU - Wirojanagud, Wanpen

N1 - Funding Information: Water sampling campaigns in eight countries were conducted as part of an international research project funded by the APN (Asia-Pacific Network for Global Change Research) through START (ARCP2008-04CMY-Park), with additional funding provided by the UNU & GIST Joint Programme on Science and Technology for Sustainability. The work conducted in Korea by JH Park was supported by Korea Forest Service (‘Forest Science & Technology Project’ S210810L010110) and the National Research Foundation of Korea funded by the Korea Government (ERC 2009-0093460; KRF-2007-313-F00033). We thank Prof. Jung-Soo Lee for drawing the site map, Sei-Young Kim for ICP-MS analysis, and numerous other students and research staff for their assistance in sample collection and analysis. Part of chemical analysis was conducted at the Central Laboratory of Kangwon National University.

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N2 - Water resources in East Asia are considered particularly vulnerable to climate variability and extremes due to strong hydrologic variability inherent in the monsoon climate and rising water demand resulting from rapid economic growth. To obtain a better understanding of the current status and climate-induced risks concerning surface water quality in East Asia, seasonal and spatial variations in surface water quality were compared among 11 watersheds in eight countries during typical dry and wet periods from 2006 to 2008. While concentrations of dissolved ions tended to be higher during dry periods, concentrations of suspended sediments and dissolved organic matter were significantly higher during wet periods at most sampling locations. Metals with low solubility showed higher total concentrations during wet periods and had strong positive relationships with suspended sediment concentrations. Metals with high partitioning into the dissolved phase exhibited higher concentrations during dry periods at many sites. Seasonal and spatial patterns were distinct along the Lower Mekong River, including much higher monsoonal concentrations of sediment-associated metals and relatively high dry-season concentrations of dissolved As along upper reaches. The results suggest that rainfall variability is crucial in understanding seasonality and climate-induced risks concerning surface water quality in East Asia.

AB - Water resources in East Asia are considered particularly vulnerable to climate variability and extremes due to strong hydrologic variability inherent in the monsoon climate and rising water demand resulting from rapid economic growth. To obtain a better understanding of the current status and climate-induced risks concerning surface water quality in East Asia, seasonal and spatial variations in surface water quality were compared among 11 watersheds in eight countries during typical dry and wet periods from 2006 to 2008. While concentrations of dissolved ions tended to be higher during dry periods, concentrations of suspended sediments and dissolved organic matter were significantly higher during wet periods at most sampling locations. Metals with low solubility showed higher total concentrations during wet periods and had strong positive relationships with suspended sediment concentrations. Metals with high partitioning into the dissolved phase exhibited higher concentrations during dry periods at many sites. Seasonal and spatial patterns were distinct along the Lower Mekong River, including much higher monsoonal concentrations of sediment-associated metals and relatively high dry-season concentrations of dissolved As along upper reaches. The results suggest that rainfall variability is crucial in understanding seasonality and climate-induced risks concerning surface water quality in East Asia.

KW - East Asia

KW - Mekong River

KW - Rainfall variability

KW - Surface water quality

KW - Suspended sediments

KW - Trace metals

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VL - 400

SP - 323

EP - 332

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JF - Journal of Hydrology

IS - 3-4

ER -

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

Abstract

Bibliographical note

Keywords

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