• Assess transboundary drivers (anthropogenic/environmental) of flood hazards.

• Examine linkages between drivers and flood vulnerability through cross-border cooperative scenarios.

• Address gaps in existing frameworks:

  - Upstream-downstream asymmetries (water-release policies, infrastructure disparities).

  - Cross-border causal factors (shared hydrological dynamics, political tensions).

• Collaborative governance mechanisms for flood response.

Integration of Multiple Dimensions:

• Anthropogenic: Land use, population density, infrastructure.

• Environmental: Climatic factors, deforestation, runoff.

• Hydrological: River discharge, relief patterns.

• Political: Transboundary treaties, institutional capacities.

• Infrastructural: Dams, embankments, early-warning systems.

Key Innovations:

• Composite Indices:

  - ADI (Anthropogenic Development Index)

  - EPI (Environmental Pressure Index)

  - BSI (Basin Sensitivity Index)

  - FRI (Flood Risk Index)

  - TFRR (Transboundary Flood Response Ratio)

• Future Climate Scenarios: RCP 4.5 & 8.5 with 25-/250-year flood return periods.

Limitations Addressed by TRANSFLOOD:

• IPCC Triad: Overlooks transboundary exposure asymmetries and collaborative response capacities.

• DPSIR: Diagnostic but not predictive; lacks governance focus.

• TWAP: Fixed scoring; insufficient for dynamic flood scenarios.

TRANSFLOOD advances by:

• Synthesizing strengths with cross-border causality and governance layers.

• Enabling scalable sub-basin comparisons via standardized indices.

• Case Study Focus: GBM

• Key Insight: Flood vulnerability is transboundary.

• Data Integration: Multi-source datasets (hydrological, socio-economic, governance).

• Stakeholder Engagement: Cross-border workshops to validate scenarios.

• Scenario Modeling: Combines climate projections (RCPs) with flood-frequency analysis.

• Index Development: Weighted composite indices for comparative analysis.

• Supports transboundary water agreements by quantifying shared risks.

• Guides investment in adaptive infrastructure (Nepal-India-Bangladesh flood forecasting).

• Aligns with SDGs: Goal 6 (water governance), Goal 13 (climate action).

Conclusion: Bridges local vulnerability and transboundary governance for climate-resilient flood management.