The New Water: Opportunities and Challenges of the Rise to Prominence of Groundwater in Sri Lanka in the Face of Socioeconomic and Climatic Change

Silva, Sanjiv de; Aheeyar, M. M. M.; Arulingam, Indika; Manthrithilake, Herath

doi:10.1007/978-981-10-3889-1_44

Cited by 3 publications

(5 citation statements)

References 24 publications

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“…Water shortage is the foremost issue in the country's dry zone [16][17][18][19], where there is a significant demand for water to irrigate 85% of the land to boost agricultural productivity [20,21]. Although Sri Lanka has six types of aquifers and a wide range of geological and hydrogeological settings in its 65,610 km 2 territory, groundwater extraction for agricultural purposes has long been restricted to the districts in the Northern Province (Jaffna, Kilinochchi, Mullaitivu, Vavuniya, and Mannar), that lack a perennial surface water resource [22,23]. It is estimated that over 55% of Sri Lanka's population depends on groundwater for everyday domestic consumption [24].…”

Section: Introductionmentioning

confidence: 99%

“…Groundwater has been used for drinking and other domestic purposes across Sri Lanka. However, it is the only source of domestic water in several districts, including Kilinochchi [22]. Overall, Sri Lanka's groundwater potential is lower than its surface water resources.…”

Section: Introductionmentioning

confidence: 99%

“…Overall, Sri Lanka's groundwater potential is lower than its surface water resources. The total estimated groundwater potential is 7.8 billion m 3 per year [22], equivalent to around 15% of the country's surface water resources [25]. In addition, another 7 km 3 of water is shared by surface and groundwater [22].…”

Section: Introductionmentioning

confidence: 99%

“…Groundwater is the primary source of drinking and agricultural practice in the Kilinochchi district [22]. It is indiscriminately extracted in many parts of the district, as surface water is insufficient to satisfy the demand.…”

Section: Introductionmentioning

confidence: 99%

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An Approach to Delineate Potential Groundwater Zones in Kilinochchi District, Sri Lanka, Using GIS Techniques

Pathmanandakumar

Thasarathan

Ranagalage

2021

IJGI

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The scarcity of surface water resources in the dry season in the Kilinochchi district increases the demand for freshwater. Therefore, the main objective of this study is to delineate potential groundwater zones in Kilinochchi, Sri Lanka, using integrated remote sensing (RS), geographic information systems (GIS) and the analytical hierarchy process (AHP). Groundwater potential zones are demarcated for the Kilinochchi district by overlaying thematic layers: geology, geomorphology, land use/land cover, soil types, drainage density, slope, lineament, and rainfall. The thematic layers were integrated into a geographic information system, and a weighted overlay analysis was carried out to delineate groundwater zones. Thus the resultant map is categorized into five different potential zones: very low (59.12 km2), low (207.78 km2), moderate (309.89 km2), high (507.74 km2), and very high (111.26 km2). The groundwater potential map was validated with the existing seventy-nine wells, which indicated a good prediction accuracy of 81.8%. This suggests that the results obtained by integrating RS-GIS and AHP are well-matched with the existing well water depth. The AHP approach based on RS-GIS was a handy and efficient technique for assessing potential groundwater zones. This research will help policymakers better manage the Kilinochchi district’s groundwater resources and give scope for further research into groundwater exploration in the area.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

An Approach to Delineate Potential Groundwater Zones in Kilinochchi District, Sri Lanka, Using GIS Techniques

Pathmanandakumar

Thasarathan

Ranagalage

2021

IJGI

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“…While helping to close the food supply deficit, one major cost is likely to be the material impact of balance of payments. In some countries, for example, Sri Lanka, such a strategy may go against current attempts by the government to reduce the balance of payment impact of food exports (de Silva et al 2018).…”

mentioning

confidence: 99%

Review of water and climate adaptation financing and institutional frameworks in South Asia. Background Paper 3

Suhardiman¹,

Silva²,

Arulingam³

et al. 2019

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Impact of rainfall on the water quality of a tropical river: based on the Nilwala River in the southern province of Sri Lanka between March and October 2019

Diwyanjalee,

Premarathne

2024

Water Practice &Amp; Technology

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The study addresses the pressing need for an effective monitoring system to assess aquatic water quality, given the exacerbating impact of climate change on surface water bodies. Focusing on the Nilwala River, the research pursues three main objectives: comparative analysis of the Weighted Arithmetic Water Quality Index (WAWQI) values across different river locations, exploration of correlations between monthly rainfall and various physicochemical parameters at distinct sampling sites, and examination of notable disparities in the WAWQI between dry and wet months. Data collected from eight river locations from March to October 2019 revealed significant temporal variations in pH, temperature, chemical oxygen demand (COD), electrical conductivity (EC), alkalinity, chloride (Cl−), and nitrate (NO3-) content. The WAWQI increased across all sites during the drought, with only Site 4 (Wellathota) deemed suitable for drinking. Statistical analyses using an one-way ANOVA and multiple linear regressions unveiled significant relationships between rainfall and pH, biological oxygen demand (BOD), EC, and total alkalinity. The total alkalinity is the most affected parameter by the rainfall. Rainfall positively predicted BOD, COD, and NO3- concentration while negatively predicting other parameters.

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The New Water: Opportunities and Challenges of the Rise to Prominence of Groundwater in Sri Lanka in the Face of Socioeconomic and Climatic Change

Cited by 3 publications

References 24 publications

An Approach to Delineate Potential Groundwater Zones in Kilinochchi District, Sri Lanka, Using GIS Techniques

An Approach to Delineate Potential Groundwater Zones in Kilinochchi District, Sri Lanka, Using GIS Techniques

Review of water and climate adaptation financing and institutional frameworks in South Asia. Background Paper 3

Impact of rainfall on the water quality of a tropical river: based on the Nilwala River in the southern province of Sri Lanka between March and October 2019

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