Flooding and vulnerability in Bangladesh

Bangladesh, a low-lying delta region, faces significant challenges due to flooding, which has intensified since the 1970s. With predictions of worsening conditions due to climate change, the densely populated coastal areas are at increasing risk of both river and coastal flooding.

Factors increasing flood vulnerability in Bangladesh

• Low-lying geography - Much of the country is a delta, making it prone to flooding from rivers and sea-level rise.
• Rising flood intensity - Since 1970, floods have become more severe in scale, frequency, and duration.
• Sea-level rise impacts - Coastal zones are increasingly submerged, with projections showing significant land loss.
• Extreme precipitation trends - Monsoon rainfall is expected to increase by 14-40% by the 2030s and 52-135% by the 2090s, exacerbating flood risks.
• Poor construction standards - Many homes are made from fragile materials like sand and mud, offering little resistance to flood damage.
• Economic constraints - Low and undiversified income levels hinder the population's ability to cope with climate change effects, especially on the frequently flooded Padma River islands.

Climate change impacts and vulnerability in Ghana

In Ghana, climate change poses varied threats across different environmental zones, disproportionately affecting certain population groups. The impacts extend beyond environmental changes to social and economic challenges.

Vulnerable population groups in Ghana

The poor, elderly, women, children, the infirm, indigenous groups, minorities, and refugees are most at risk due to limited resources and adaptive capacity. Effects include reduced water availability, higher rates of illness and death, increased poverty, and forced migration from affected areas.

Climate change impacts across environmental zones in Ghana

Adaptation strategies in Bangladesh and Ghana

Both Bangladesh and Ghana have implemented measures to mitigate the impacts of climate change and reduce vulnerability. These strategies range from infrastructure projects to community empowerment initiatives.

Adaptation measures in Bangladesh

• Flood Action Plan (1988) - A comprehensive strategy to protect against flooding, including the construction of sluice gates on rivers to guard against tidal waves and storm surges.
• Infrastructure developments - Approximately 5,700 km of embankments have been built, alongside nearly 5,000 km of drainage channels to redirect floodwater away from populated areas.
• Emergency provisions - Around 200 flood shelters on stilts have been constructed to facilitate evacuation during severe flooding events.

Adaptation measures in Ghana

• Infrastructure projects - Construction of dams, levees, and sea walls to protect against flooding and water scarcity.
• Ecosystem-based approaches - Restoration and preservation of natural habitats like mangrove swamps to provide protective ecosystem services.
• Capacity building - Educational programmes and extension services to equip communities with new skills and knowledge, empowering them to adapt to changing environmental conditions.

Comparative analysis of vulnerability factors in both regions

While both Bangladesh and Ghana face significant challenges due to climate change, the nature of their vulnerabilities and the scale of impacts differ based on geography, economic conditions, and social structures.

Contrasting vulnerability factors

• Geographical exposure - Bangladesh's low-lying delta and coastal zones make it highly susceptible to flooding and sea-level rise, whereas Ghana's varied zones (savanna, forest, coastal) experience diverse impacts like water scarcity and disease prevalence.
• Economic resilience - In Bangladesh, low income and lack of diversification worsen the impact of flooding, while in Ghana, poverty also heightens vulnerability, particularly in the northern savanna, but impacts vary by region.
• Social disparities - Ghana identifies specific groups (e.g., women, children, elderly) as most vulnerable, with impacts like increased burdens on women in coastal areas. In Bangladesh, the focus is more on widespread population exposure in flood-prone areas like the Padma River islands.
• Adaptive capacity - Bangladesh has focused heavily on physical infrastructure like embankments and shelters, while Ghana employs a mix of infrastructure, ecosystem restoration, and community education to build resilience.