Conceptual and Analytical Framework as Flood Risk Mapping Subsidy

Abstract

There are still gaps in defining values and category classifications of exposed items in quantitative damage analysis. This paper proposes a framework that refines the development of flood risk analysis at a local scale. This study first performs a quantitative risk analysis, based mainly on secondary data; it then attempts to communicate the results graphically, aiming to reduce the financial and human resources required. We propose an easily standardized database in a GIS environment, analyzing the influence of a reservoir for flood control and the construction of replicable local-scale risk curves. Hydrological (HEC-HMS) and 2D hydrodynamic (HEC-RAS) models were used to simulate hydrographs considering different return periods. For damage estimation, the processing included vectorization of lots, building use definition with Google Street View, classification of standard designs, and a field survey to validate those classes. In monetary value, this study calculated the effect of the construction of a reservoir for damage reduction, showing the potential to determine the effectiveness of measures adopted to mitigate flood impacts. In addition, for each simulated return period, exposure, hazard, and damage maps can be established, making it possible to perform a complete risk analysis.

Research Trends in Resilience and Vulnerability Studies

“…It has been reasoned that, with the growing consequence to situational mindfulness of geospatial data sources, the sharing of this information in effective, efficient ways is a primary goal for disaster risk reduction [33]. Technology, Geographic Information System (GIS) modeling for local-scale hazard inference, and big data analysis can be aids in understanding threats, and sharing information about them can support resilience and sustainability [34,35]. Beyond sharing information, reducing the gap between risk information and individual perception of risk has been a goal, as evidenced in the study by Fischer and colleagues [36] linking seismic vulnerability and stakeholder discussions about real versus perceived risk in a densely populated district in Italy.…”

Experimental Investigation of Levee Erosion during Overflow and Infiltration with Varied Hydraulic Conductivities of Levee and Foundation Properties in Saturated Conditions

“…Pakistan suffered from monsoonal flooding, resulting in a high number of immediate fatalities, totaling two thousand. These events highlight the recurring nature and severity of large-scale floods, underscoring the urgent need for effective flood management and preparedness measures [7,8]. Natural disasters such as typhoons, heavy rains, and floods have caused severe damage to Japan's infrastructure, including its river embankment systems, resulting in levee failures and widespread flooding [9,10].…”