Geochemical Characteristics and Groundwater Quality in the Vientiane Plain, Laos

In this article, the purpose of the research was to study the ecological characteristics of groundwater and central water supply used for drinking and economic activity of the Kievka village. The hydrochemical indicators of the samples were determined with conventional methods, and performed on 16 indicators: pH, electrical conductivity, suspended solids, dry residue, chlorides, sulfates, phosphates, total hardness, sodium, ammonium nitrogen, nitrites, nitrates, chemical oxygen consumption (COD), anionic surfactants (APAS), total iron, and manganese. While assessing the hydrochemical state of drinking water in the village of Kievka, it can be noted the "Altyn-dan" kindergarten and the Kiev secondary school No. 3, exceed the MAC which is determined by certain indicators. As a result of microbiological studies of the water samples from the village of Kievka, it was revealed that the total microbial number is normal. It was determined that a different number of fungi and actinomycites were present in all samples. At the initial concentration, a large concentration of fungi was observed in all samples.

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“…According to the analysis of research results, it can be noted that a large number of CFUs were observed in the sample No. 1 (Figure 1).…”

Section: Resultsmentioning

confidence: 99%

“…Bacterial contamination raised concerns about the possibility of similar contamination in groundwater. The main processes controlling the quality of groundwater at the village level and the potential threat to human health were also studied (Brindha et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Ecological Characteristics of Groundwater in Rural Areas of the Karaganda Region

et al. 2019

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“…As of 2014, 28% of the population of Laos lack access to improved water supply [52]. Groundwater can provide a generally safe and reliable water supply that does not require treatment, although given the shallow nature of the aquifers, specific attention should be given to contamination from human activities (fecal coliforms, nitrate [47]), as well as geogenic source (arsenic [48], uranium [47]). It provides the major source of water for 51% of villages in Laos (Agricultural Census 2011, map available in Appendix A).…”

Section: Discussionmentioning

confidence: 99%

“…Groundwater is already largely used in some of Laos Alluvial plain for domestic uses, and marginal cash crop irrigation. In terms of quality, these aquifers present, overall, satisfactory levels of major ions and heavy metals, but are often the most prone to contamination from the surface [47]. In central and southern Laos, Alluvial aquifers are sometimes underlain by Mesozoic sandstones, possibly containing salts.…”

Section: Areas Of Significant Groundwater Importancementioning

confidence: 99%

Regional Mapping of Groundwater Resources in Data-Scarce Regions: The Case of Laos

Viossanges¹,

Pavelic²,

Rebelo³

et al. 2017

Hydrology

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This study focuses on Laos, a landlocked nation located in SouthEast Asia with subtropical climate and highly seasonal rainfall distribution. Laos is one of the world's least developed countries, and currently witnesses an unprecedented level of development that is highly reliant on its natural resources, including groundwater. There is currently very limited data and no nationwide assessment of shallow (<30 m) groundwater resources to support sustainable management. This study provides a first step towards addressing this issue by (i) identifying the major aquifer units of the country; (ii) integrating localized data and regional maps into an assessment of the groundwater potential; and (iii) producing quantitative maps of key hydrogeological indicators. Eight aquifer units have been described and evaluated: (i) Basement aquifers, (ii) Volcanic aquifers, (iii) Schists, (iv) Paleozoic sedimentary, (v) Karsts, (vi) Limestones, (vii) Mesozoic sedimentary and (viii) Alluvial sediments. The Mesozoic sandstones and the Alluvial aquifers are the most extensive and productive hydrogeological systems in the country. The Volcanic and Karstic aquifers, although poorly known, might also have important potential. This assessment, along with the maps of quantitative aquifer indicators, provide a significant improvement in both spatial resolution and accuracy compared to previously available information. It will likely support improved management plans and the identification of areas with higher potential for groundwater development.

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“…Water quality testing of the irrigation boreholes shows that the groundwater is of an acceptable pH, with acceptably low dissolved solids and nutrient contents (DoI 2014). Further details on groundwater suitability for irrigation and drinking purposes at the village scale can be found in Brindha et al (2017). Apart from irrigation, groundwater is also widely used throughout Ekxang village for domestic purposes.…”

Section: Groundwater Conditionsmentioning

confidence: 99%

Community-managed groundwater irrigation on the Vientiane Plain of Lao PDR: planning, implementation and findings from a pilot trial.

Shivakoti¹

2018

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Geochemical Characteristics and Groundwater Quality in the Vientiane Plain, Laos

Cited by 72 publications

References 20 publications

Ecological Characteristics of Groundwater in Rural Areas of the Karaganda Region

Ecological Characteristics of Groundwater in Rural Areas of the Karaganda Region

Regional Mapping of Groundwater Resources in Data-Scarce Regions: The Case of Laos

Community-managed groundwater irrigation on the Vientiane Plain of Lao PDR: planning, implementation and findings from a pilot trial.

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