Valuing Ecosystems as an Economic Part of Climate-Compatible Development Infrastructure in Coastal Zones of Kenya & Sri Lanka

One of the measures that has been implemented widely to adapt to the effect of climate change in coastal zones is the implementation of set-back lines. The traditional approach of determining set-back lines is likely to be conservative, and thus pose unnecessary constraints on coastal zone development and fully utilising the potential of these high-return areas. In this study, we apply a newly developed risk-informed approach to determine the coastal set-back line at regional scale in a poor data environment. This approach aims to find the economic optimum by balancing the (potential) economic gain from investing in coastal zones and the risk of coastal retreat due to sea level rise and storm erosion. This application focusses on the east coast of Sri Lanka, which is experiencing rapid economic growth on one hand and severe beach erosion on the other hand. This area of Sri Lanka is a highly data-poor environment, and the data is mostly available from global databases and very limited measurement campaigns. Probabilistic estimates of coastline retreat are obtained from the application of Probabilistic Coastline Recession (PCR) framework. Economic data, such as the discount rate, rate of return of investment, cost of damage, etc., are collated from existing estimates/reports for the area. The main outcome of this study is a series of maps indicating the economically optimal set-back line (EOSL) for the ~200-km-long coastal region. The EOSL is established for the year 2025 to provide a stable basis for land-use planning decisions over the next two decades or so. The EOSLs thus determined range between 12 m and 175 m from the coastline. Sensitivity analyses show that strong variations in key economic parameters such as the discount rate have a disproportionately small impact on the EOSL.

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Locating of Salt and Fresh Water Interface in Coastal Zones Using 2D Resistivity Imageries

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.212-213.155 ◽

2012 ◽

Vol 212-213 ◽

pp. 155-162

Author(s):

Nalaka D. Subasinghe ◽

Priyantha Jinadasa

Keyword(s):

Sri Lanka ◽

Water Supply ◽

Fresh Water ◽

Saline Water ◽

Water Interface ◽

Coastal Zones ◽

Coastal Regions ◽

Saline Water Intrusion ◽

2D Resistivity ◽

Good Agreement

Demarcation of fresh- and saline-water interface is important in water supply engineering in coastal regions. A resistivity imager system was employed to investigate the saline water intrusion to freshwater table at selected coastal locations in Sri Lanka. This is the first such attempt in Sri Lanka using the above technique. Systematic geo-resistivity investigations were carried out at randomly selected sites at Mundel and Rekawa coastal areas. Measured and calculated values generally show good agreement, especially in Mundel area, where the current penetration is good. The results indicate a possibility of using resistivity imager system to demarcate the saline and fresh water interfaces and intermixing zones, especially in the wet zone.

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Aedes larval bionomics and implications for dengue control in the paradigmatic Jaffna peninsula, northern Sri Lanka

Parasites & Vectors ◽

10.1186/s13071-021-04640-6 ◽

2021 ◽

Vol 14 (1) ◽

Author(s):

Sinnathamby N. Surendran ◽

Tibutius T. P. Jayadas ◽

Vaikunthavasan Thiruchenthooran ◽

Selvarajah Raveendran ◽

Annathurai Tharsan ◽

...

Keyword(s):

Sri Lanka ◽

Aedes Aegypti ◽

Habitat Preferences ◽

Habitat Characteristics ◽

Coastal Zones ◽

Source Reduction ◽

Preimaginal Development ◽

Preimaginal Stages ◽

Reduction Methods ◽

Dengue Control

Abstract Background The larval bionomics of Aedes across the Jaffna peninsula in northern Sri Lanka was investigated to obtain information needed for developing more effective larval source reduction measures to control endemic arboviral diseases. Methods The habitats of preimaginal stages of Aedes mosquitoes were surveyed, and ovitrap collections were carried out in densely populated areas of the Jaffna peninsula. Aedes larval productivities were analysed against habitat characteristics, rainfall and dengue incidence. Adults emerging from collected larvae were tested for dengue virus (DENV). Results Only Aedes aegypti, Ae. albopictus and Ae. vittatus were identified in the field habitat collections and ovitraps. Aedes aegypti was the predominant species in both the field habitat and ovitrap collections, followed by Ae. albopictus and small numbers of Ae. vittatus. Tires and open drains were the preferred field habitats for Ae. aegypti, although larval productivity was higher in discarded plastic containers. The three Aedes species differed in field habitat preferences. Concomitant presence of the three Aedes species was observed in the field habitats and ovitraps. Larval productivities were inversely correlated with the salinity of the field habitat. Rainfall in the preceding month significantly correlated with larval productivity in the field habitats. DENV serotype 2 was detected in Ae. aegypti collected from ovitraps in the city of Jaffna. High Breteau, House and Container indices of 5.1, 5.1 and 7.9%, respectively, were observed in the field habitat surveys and ovitrap indices of up to 92% were found in Jaffna city. Conclusions Aedes larval indices in populated areas of the peninsula showed a high potential for dengue epidemics. Unacceptable littering practices, failure to implement existing dengue control guidelines, vertical transmission of DENV in vector mosquitoes and preimaginal development in brackish water and open surface drains, as well as in domestic wells that provide potable water, are serious constraints to the current Aedes larval source reduction methods used to control dengue in the Jaffna peninsula. Similar shortcomings in arboviral disease control are likely present in other resource-constrained tropical coastal zones worldwide.

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Abstract #604: Detection of Cardiovascular Risk Factors by Anthropometric Measures in Adults Living in an Urban Setting in Sri Lanka

Endocrine Practice ◽

10.1016/s1530-891x(20)42668-0 ◽

2015 ◽

Vol 21 ◽

pp. 114-115

Author(s):

Kavinga Gunawardane ◽

Noel Somasundaram ◽

Neil Thalagala ◽

Pubudu Chulasiri ◽

Sudath Fernando

Keyword(s):

Risk Factors ◽

Cardiovascular Risk ◽

Sri Lanka ◽

Cardiovascular Risk Factors ◽

Urban Setting ◽

Anthropometric Measures

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Prevalence of Suicidal Ideation in Sri Lanka

Crisis ◽

10.1027/0227-5910/a000010 ◽

2010 ◽

Vol 31 (1) ◽

pp. 30-35 ◽

Cited By ~ 3

Author(s):

Sudath Samaraweera ◽

Athula Sumathipala ◽

Sisira Siribaddana ◽

S. Sivayogan ◽

Dinesh Bhugra

Keyword(s):

Suicidal Ideation ◽

Sri Lanka ◽

General Population ◽

Suicide Attempts ◽

National Average ◽

The West ◽

Suicide Methods ◽

Suicide Rates ◽

Completed Suicide ◽

The World

Background: Suicidal ideation can often lead to suicide attempts and completed suicide. Studies have shown that Sri Lanka has one of the highest rates of suicide in the world but so far no studies have looked at prevalence of suicidal ideation in a general population in Sri Lanka. Aims: We wanted to determine the prevalence of suicidal ideation by randomly selecting six Divisional Secretariats (Dss) out of 17 in one district. This district is known to have higher than national average rates of suicide. Methods: 808 participants were interviewed using Sinhala versions of GHQ-30 and Beck’s Scale for Suicidal Ideation. Of these, 387 (48%) were males, and 421 (52%) were female. Results: On Beck’s Scale for Suicidal Ideation, 29 individuals (4%) had active suicidal ideation and 23 (3%) had passive suicidal ideation. The active suicidal ideators were young, physically ill and had higher levels of helplessness and hopelessness. Conclusions: The prevalence of suicidal ideation in Sri Lanka is lower than reported from the West and yet suicide rates are higher. Further work must explore cultural and religious factors.

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Suicide on the Indian Subcontinent

Crisis ◽

10.1027//0227-5910.23.3.104 ◽

2002 ◽

Vol 23 (3) ◽

pp. 104-107 ◽

Cited By ~ 36

Author(s):

Murad M. Khan

Keyword(s):

Sri Lanka ◽

Mental Health Professionals ◽

Indian Subcontinent ◽

Interpersonal Relationship ◽

Public Health Problem ◽

Elderly Subjects ◽

Important Public Health Problem ◽

Policy Makers ◽

Formidable Challenge ◽

Causative Factors

Summary: The Indian subcontinent comprises eight countries (India, Pakistan, Bangladesh, Nepal, Sri Lanka, Afghanistan, Bhutan, and the Maldives) and a collective population of more than 1.3 billion people. 10% of the world's suicides (more than 100,000 people) take place in just three of these countries, viz. India, Sri Lanka, and Pakistan. There is very little information on suicides from the other four countries. Some differences from suicides in Western countries include the high use of organophosphate insecticides, larger numbers of married women, fewer elderly subjects, and interpersonal relationship problems and life events as important causative factors. There is need for more and better information regarding suicide in the countries of the Indian subcontinent. In particular, studies must address culture-specific risk factors associated with suicide in these countries. The prevention of this important public health problem in an area of the world with myriad socio-economic problems, meager resources, and stigmatization of mental illness poses a formidable challenge to mental health professionals, policy makers, and governments of these countries.

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