2. Flood Risk Assessment

So first they talk about what is a flood risk assessment you know because that is FRA, we call it as flood risk assessment that is a very basic key tool as a traditional approach in the traditional approach to understand and managing the flood risk.

Flood Risk Assessment (FRA) is a basic and essential tool used to understand and manage the risks associated with flooding. It involves analyzing various factors to determine the likelihood of floods and their potential impacts on communities and infrastructure.

Imagine a community that builds a new playground near a river. Before building it, they perform a flood risk assessment to find out how often the river floods, how high the water can rise, and what might happen if it floods. This way, they can make informed decisions to keep the playground and its users safe.

So and if you look at FRA techniques much of the work has been mostly focused on the quantitative aspects or the target based on how much has been impacted or the cause of them.

In flood risk assessments, much of the analysis has focused on quantitative aspects, such as measuring the economic impacts of floods in terms of damage to properties and businesses. This includes calculating costs and estimating financial losses that floods can cause.

Consider a business that experiences flooding. The FRA might measure the total costs of repairs, lost sales, and clean-up expenses. If the assessment shows that flooding caused $100,000 in damage, it helps the business understand the financial risk of being in that location.

And when it talks about these quantifiable impacts, do not reflect the entire effects of flooding you know that like, for instance, there is not only about the monetary aspects, there is a physical aspect, and there is also to do with the non-monetary aspects of the intangible aspects of it.

While quantitative measures of flood impacts are valuable, they often do not capture the full range of effects that floods create. This includes both tangible impacts, like building damage, and intangible ones, such as emotional distress or loss of cultural heritage. These non-monetary aspects are critical but frequently overlooked in traditional assessments.

Think of a family that loses their home to flooding. Beyond the financial cost of repairs, they face emotional stress, loss of precious memories, and displacement from their community. A complete flood risk assessment should consider not just the money spent, but also the emotional toll of the event.

So when we say about the hazard assessment of any floods that is where the hydrologist they talk about many hydrological models when it is a 1d model the 2d models and which actually talks about the represent the process by which rainfall is converted into the surface runoff.

Hazard assessment in flood risk involves the use of hydrological models that simulate how rainfall turns into surface runoff. These models can be one-dimensional (1D) or two-dimensional (2D), helping researchers understand how water flows across landscapes and what areas are likely to flood.

Picture a large bathtub filling with water; if the water were rain instead, a 1D model would represent the water filling up linearly, while a 2D model could show how the water spreads out across the surface, helping predict where it might overflow and cause a flood.

Whereas in the vulnerability assessment it actually has to it is often assessed using the site-specific indicators or measurements, and this is where the multiple aspects which has to be combined by multi-criteria methods.

Vulnerability assessments look at how certain locations or communities might be affected by floods. This involves using specific indicators and measurements relevant to the site, and combining various criteria to evaluate the level of risk for each area.

Think of a neighborhood where some houses are built on higher ground while others are closer to the river. A vulnerability assessment would involve checking how many feet above flood level each house is, the materials used in construction, and the preparedness of the residents to develop a comprehensive understanding of the risks.

Where we call about R=risk=hazard when vulnerability adds on to it that is where the risk component comes to it and this is the risk perception approach how people how the communities percept this approach you know the risk.

Risk perception refers to how people and communities understand and react to risks from flooding. It involves both the actual hazards they face and their vulnerabilities. This means that individuals' and communities' experiences, knowledge, and beliefs significantly influence how they perceive risk.

Consider two homeowners near a river: one has lived there for years and knows the river often floods, while the other is new and unaware of the history. The first homeowner is likely to take precautions, while the second may underestimate the risk because they lack familiarity with the area's flood patterns.

What this authors have tried to do they tried to club both the methods of both, one is the scientific approach of it, and second is the social approach to it, and the perception of it.

The authors of the study combine scientific methods with social approaches to assess flood risks. This means they consider both data-driven insights (like hydrological models) and public perception (how local communities view and respond to flood risks) for a more comprehensive understanding.

Imagine planning a community event on a sunny day versus a day that has heavy rain predictions. If you just look at the weather forecast (scientific approach) without talking to community members about their experiences with rain (social approach), you might miss important insights about potential venue changes or preparedness needs.

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