Risk of seawater intrusion on coastal community of Bentota river basin Sri Lanka

Perera, Mahendra; Ranasinghe, Tkgp; Piyadasa, R.U.K.; Jayasinghe, G.Y.

doi:10.1016/j.proeng.2018.01.090

Cited by 26 publications

(4 citation statements)

References 8 publications

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“…According to the Intergovernmental Panel on Climate Change (IPCC) climate change assessment published in 2014, the coast is vulnerable to climate phenomena such as drought, rising temperatures, and saltwater intrusion [31]. The human population has grown, and the increased demand has resulted in a slew of large-scale projects that have had an impact on hydrological flows [32].…”

Section: Effect Of Saltwater Intrusionmentioning

confidence: 99%

Preventing saltwater intrusion in the Coastal of Terengganu, can BRIS soil system help?

Syazuani

Edlic

Sofiyan

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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Coastal zone is among the most heavily populated areas across the world. The increasing population and rapid development in this area could lead to the possibility of over pumping groundwater. If the groundwater extracted excessively, the saltwater could intrude into the groundwater system and cause the problem. Thus, to prevent this situation from happen, the coastal wetland which known as the beach ridges interspersed with swales (BRIS) soil system area need to be taken care of, as it can recharge the groundwater. Even though this area has been neglected and undervalued for their ecosystem services (purifying groundwater), there are the potential of this area to prevent the saltwater intrusion from happened. Hence, this paper will highlight the potential of BRIS soil system in preventing the saltwater intrusion.

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Section: Effect Of Saltwater Intrusionmentioning

confidence: 99%

Preventing saltwater intrusion in the Coastal of Terengganu, can BRIS soil system help?

Syazuani

Edlic

Sofiyan

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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“…Seawater intrusion (SWI) is a major environmental issue in coastal areas with intensive anthropogenic activity. It deteriorates groundwater quality and decreases water availability, affecting industrial-agricultural production and resident living [1][2][3][4]. In recent years, the increasing groundwater exploitation due to population growth and urbanization in coastal areas has exacerbated SWI [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Seawater Intrusion-Retreat Processes and Groundwater Evolution in Intruded Coastal Aquifers with Land Reclamation: A Case Study of Eastern Jiangsu, China

Xiong

Chen

et al. 2022

Lithosphere

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The hydrogeochemical analysis and numerical simulation were conducted to explore the impact of land reclamation on submarine groundwater discharge and groundwater evolution in the seawater intrusion-retreat processes in eastern Jiangsu, China. The hydrogeochemical results indicated that the origin of salt in most groundwater is saltwater mixing, and weathering-dissolution of minerals enriches the salt in fresh groundwater. The evolution path of coastal groundwater in Jiangsu is Ca-Na-HCO3-Cl → Ca-Na-Cl-HCO3 → Na-Ca-Cl-HCO3 → Na-Mg-HCO3 → Na-Mg-HCO3-Cl → Na-Cl-HCO3 → Na-Cl, and the difference in groundwater evolution in different regions is obvious. The numerical simulation revealed that the land reclamation has blocked groundwater exchange and restrained the seawater intrusion. The sensitive analysis indicated that the permeability and the slope of the land reclamation have dominated the salinity distribution. And the aquifer heterogeneity promotes groundwater evolution and leads to the irregular salinity distribution of the groundwater. Moreover, the groundwater evolution in the shallow aquifer with the land reclamation shows that the residual seawater is gradually desalinating and discharged into the sea. The land reclamation is salinized by saltwater discharge and seawater intrusion together and then subsides into a stable saltwater wedge. The groundwater salinity distribution in Jiangsu is not fit seawater intrusion, which is caused by the coastline changes due to anthropogenic land reclamation and natural activities.

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“…Soil salinity is an enormous problem in coastal regions and the irrigated lands in dry zones of Sri Lanka. Approximately 11,200 ha of coastal lands have been affected and more than 50% of the coastal paddy lands have been abandoned due to salinity [21]. Jaffna Peninsula, located in the northern most part of Sri Lanka, is one of the most salt-affected regions in Sri Lanka.…”

Section: Introductionmentioning

confidence: 99%

Modeling and Mapping of Soil Salinity and its Impact on Paddy Lands in Jaffna Peninsula, Sri Lanka

Gopalakrishnan

Kumar

2020

Sustainability

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Soil salinity is a major threat to land productivity, water resources and agriculture in coastal areas and arid and semi-arid regions of the world. This has a significantly negative effect on the land and causes desertification. Monitoring salt accumulation in the soil is crucial for the prevention of land degradation in such environments. This study attempted to estimate and map soil salinity in Jaffna Peninsula, a semi-arid region of Sri Lanka. A Partial Least Squares Regression (PLSR) model was constructed using Sentinel 2A satellite imagery and field-measured soil electrical conductivity (EC) values. The results showed that satisfactory prediction of the soil salinity could be made based on the PLSR model coupled with Sentinel 2A satellite imagery (R2 = 0.69, RMSE = 0.4830). Overall, 32.8% of the land and 45% of paddy lands in Jaffna Peninsula are affected by salt. The findings of this study indicate that PLSR is suitable for the soil salinity mapping, especially in semi-arid regions like Jaffna Peninsula. The results underpin the importance of building adaptive capacity and implementing suitable preventive strategies for sustainable land and agricultural management.

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Risk of seawater intrusion on coastal community of Bentota river basin Sri Lanka

Cited by 26 publications

References 8 publications

Preventing saltwater intrusion in the Coastal of Terengganu, can BRIS soil system help?

Preventing saltwater intrusion in the Coastal of Terengganu, can BRIS soil system help?

Seawater Intrusion-Retreat Processes and Groundwater Evolution in Intruded Coastal Aquifers with Land Reclamation: A Case Study of Eastern Jiangsu, China

Modeling and Mapping of Soil Salinity and its Impact on Paddy Lands in Jaffna Peninsula, Sri Lanka

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