naa a22 4500 510752799 CHVBK 20180411083110.0 cr unu---uuuuu 180411e20131101xx s 000 0 eng 10.1007/s11270-013-1765-0 doi (NATIONALLICENCE)springer-10.1007/s11270-013-1765-0 Quantifying Source and Dynamics of Acidic Pollution in a Coastal Acid Sulphate Soil Area [Elektronische Daten] [N. Phong, T. Tuong, N. Phu, N. Nang, C. Hoanh] The in-depth knowledge on management and reducing annual acidic pollution is important for improving the sustainable livelihood of people living in areas with acid sulphate soils (ASS). This study involved a long-term (2001-2006), large-scale canal water quality monitoring network (87 locations) and a field experiment at nine sites to quantify the dynamic variability of acidic pollution and its source in a coastal area with ASS in the Mekong River Delta of Vietnam. Widespread acidic pollution (pH <5) of surface water occurred at the beginning of the rainy season, while pH of the canal water remained high (7-8) at the end of the rainy season and during the dry season. The study identified canal embankment deposits, made of ASS spoils from canal dredging/excavation, as the main source of acidic pollution in the surrounding canal network. The findings suggested that there was a linkage between the amount of acidic loads into canal networks and the age of the embankment deposits. The most acute pollution (pH ~ 3) occurred in canals with sluggish tidal water flow, at 1-2years after the deposition of excavated spoils onto the embankments in ASS. The amount of acidic loads transferred to the canal networks could be quantified from environmental parameters, including cumulative rainfall, soil type and age of embankment deposits. The study implied that dredging/excavation of canals in ASS areas must be carried out judiciously as these activities may increase the source of acidic pollution to the surrounding water bodies. Springer Science+Business Media Dordrecht, 2013 Environment nationallicence Pollution nationallicence Water quality nationallicence Water management nationallicence Dredged canal nationallicence Acidity nationallicence Acid sulphate soil nationallicence Phong N. Melbourne University, Melbourne, Australia aut Tuong T. International Rice Research Institute, Los Baños, Laguna, Philippines aut Phu N. University of Agriculture and Forestry, Ho Chi Minh City, Vietnam aut Nang N. University of Agriculture and Forestry, Ho Chi Minh City, Vietnam aut Hoanh C. International Water Management Institute, Colombo, Sri Lanka aut Water, Air, & Soil Pollution Springer Netherlands 224/11(2013-11-01), 1-18 0049-6979 224:11<1 2013 224 11270 https://doi.org/10.1007/s11270-013-1765-0 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11270-013-1765-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Phong N. Melbourne University, Melbourne, Australia aut NATIONALLICENCE 700 1- Tuong T. International Rice Research Institute, Los Baños, Laguna, Philippines aut NATIONALLICENCE 700 1- Phu N. University of Agriculture and Forestry, Ho Chi Minh City, Vietnam aut NATIONALLICENCE 700 1- Nang N. University of Agriculture and Forestry, Ho Chi Minh City, Vietnam aut NATIONALLICENCE 700 1- Hoanh C. International Water Management Institute, Colombo, Sri Lanka aut NATIONALLICENCE 773 0- Water, Air, & Soil Pollution Springer Netherlands 224/11(2013-11-01), 1-18 0049-6979 224:11<1 2013 224 11270 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer