Karina Lalchand Sheri, Author at HSSE Online

Teachers’ Perceptions of Climate Change Induced Heat Stress and Related Heat Management Strategies In Singapore’s Schools

Author/s:

Karina Lalchand Sheri (National Institute of Education (Singapore)) Keywords Geography Junior College Secondary School Global warming is palpable in Singapore. Given that most classrooms in the country are largely affected by rising ambient temperatures, students are susceptible to heat stress, which undermines their learning productivity. This qualitative study sought to understand what six secondary school teachers […]

Karina Lalchand Sheri (National Institute of Education (Singapore))

Keywords
Geography
Junior College
Secondary School

Global warming is palpable in Singapore. Given that most classrooms in the country are largely affected by rising ambient temperatures, students are susceptible to heat stress, which undermines their learning productivity. This qualitative study sought to understand what six secondary school teachers in Singapore thought about the adverse effects that climate change induced warming can have on their students’ learning. While thermal discomfort was a real issue to contend with, this study found that its effects on productivity varied across time, from student to student, and among schools. Instead of relying on cooling methods that involved the further use of energy/resources for temporary thermal relief, the recommendations/strategies for dealing with heat stress mentioned by the teachers were far more sustainable and contextually specific.

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Mega Dams and Their Impacts On Downstream Sand Bar and Island Dynamics Along The Madeira River, Brazil

Author/s:

Karina Lalchand Sheri

Karina Lalchand Sheri (National Institute of Education (Singapore)) Keywords Geography Junior College Secondary School This paper investigates the impact of both Santo Antônio and Jirau mega dams on the downstream geomorphology of, more specifically, island and bar dynamics along the Madeira River in the Amazon. Water level data from gauge stations and remote sensing images from […]

Karina Lalchand Sheri (National Institute of Education (Singapore))

Keywords
Geography
Junior College
Secondary School

This paper investigates the impact of both Santo Antônio and Jirau mega dams on the downstream geomorphology of, more specifically, island and bar dynamics along the Madeira River in the Amazon. Water level data from gauge stations and remote sensing images from 1990 to 2019 were deployed to make sense of the changes in the number, area and volume of islands/bars downstream of the dams. The data indicated that both Santo Antônio and Jirau, which are run-of-river dams have not had significant impacts on the area and volume of islands/bars found in Madeira River’s five reaches. A reduction in the volume of islands/bars was marginally more substantial than a negligible reduction in their areal extent. Trapped sediments behind both dams could have accounted for the slight decrease in island/bar volume. Overall, this paper opens up a discussion on the sustainability of fluvial/geomorphological features and water regimes, alongside the installation of run-of-river dams as an allegedly more sustainable alternative to other kinds of hydraulic structures and non-renewable sources of energy. Student-teachers who are taking tertiary courses in physical Geography, as well as A Level Geography educators are likely to take interest in this in-depth and well contextualised case study of mega dams in Brazil.

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