Canal estate development in an acid sulfate soil—Implications for human metal exposure

Ljung, Karin; Maley, Fiona; Cook, Angus

doi:10.1016/j.landurbplan.2010.05.003

Cited by 19 publications

(9 citation statements)

References 16 publications

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“…These Much research has been undertaken to identify the environ-mental impact of dredging. The environmental impact of dredging includes an increase in the level of turbidity, organic and metal compounds in the water and dredged sediment (Wu et al, 2007;Munawar, 1989;Ljung, 2010). In addition, it has been considered good dredging practice to use sediment quality guidelines to characterise the levels of contamination in dredged sites in developed countries such as the United States.…”

Section: Introductionmentioning

confidence: 99%

Data analysis for environmental impact of dredging

Manap

Voulvoulis

2016

Journal of Cleaner Production

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The aim of this paper is twofold; first is to identify the environmental impact of dredging related to water and sediment quality; and second is to identify the main factors determining the environmental impact of dredging. The method of this research is data analysis using historical dredging data from three dredging projects performed from 2006 to 2008 at two connected rivers in Perak, Malaysia. The indices measured to identify the impact include: total suspended solids, dissolved oxygen, chemical oxygen demand, biochemical oxygen demand, pH, total organic content, iron, zinc, manganese, copper, chromium, mercury, arsenic, and lead. The factors are then identified through determination of relationships between concentration levels in sediment and water and identification of patterns of impact in the water and caged fish during dredging activities. The results of the analysis show that dredging performed in these rivers has an impact on the environment. The impact includes an increase in levels of most of the monitored indices, including dissolved oxygen and metal concentrations in highly contaminated areas. The main factors associated with the environmental impacts of dredging are the contamination level of the sediment and the contamination level of the neighbouring area, aspects that are the main scientific value added by this paper. This paper draws conclusions regarding the importance of two analyses prior to commencement of dredging: sediment quality analysis and analysis of contamination level in the neighbouring area prior to dredging. The results of this paper could help to better anticipate the environmental impact of dredging and allow for suitable mitigation measures to be identified, especially for developing countries such as Malaysia.

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Section: Introductionmentioning

confidence: 99%

Data analysis for environmental impact of dredging

Manap

Voulvoulis

2016

Journal of Cleaner Production

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“…The dredging of land for the construction of canal estates can be of concern due to the occurrence of acid sulphate soils and sediments (ASS) in many coastal areas (Ljug et al, 2010;Reilly & Phillips 1998). Acid sulphate soils and sediments are generally found in low-lying areas where canal estates are typically constructed.…”

Section: Canal Estates Systemsmentioning

confidence: 99%

“…The sulfidic minerals present in the ASS, when disturbed and in contact with oxygen, produce sulphuric acid, which in turn decreases considerably sediment pH, and thus increases sediment metal mobility as well as metal concentrations of surrounding waterways (e.g. Ljug et al 2010). Therefore, the disturbance generated by the construction of these canals can significantly degrade soil and water quality (Ljug et al 2010).…”

Section: Canal Estates Systemsmentioning

confidence: 99%

“…Ljug et al 2010). Therefore, the disturbance generated by the construction of these canals can significantly degrade soil and water quality (Ljug et al 2010).…”

Section: Canal Estates Systemsmentioning

confidence: 99%

“…In sulphate rich sediments, the release of phosphate from the sediments was controlled by iron availability and the sulphate concentration . We did not measure sediment iron concentration but the dredging of low-lying areas for the construction of canal estates is known to have resulted in acid sulphate soils (ASS), which contain iron sulphide minerals (Ljug et al 2010;Reilley & Phillips 1998). Consequently, the existence of sulphate in these canal estates sediments is one of the factors that could be favouring the release of phosphate to the water column.…”

Section: Nutrient Fluxesmentioning

confidence: 99%

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