| Baseline Scenario |
This scenario described the most likely evolution of the system if the main input variables (e.g., ‘precipitation’, ‘evapotranspiration,’ ‘sea level rise,’ ‘infrastructure quality,’ ‘institutional capacity to cope with flooding’) change according to the climate change projections and the regeneration plan for Thamesmead (TM). |
| Scenario 1 – ‘Replacing infrastructure’ |
In this scenario, stormwater and drainage systems were replaced at the end of their service life (approximately 40 years). Therefore, changes in the parameters of these systems were made in 2046 and 2087. |
| Scenario 2 – ‘Planned ordinary maintenance’ |
In this scenario, stormwater and drainage systems were regularly maintained from 2030 onwards. The effects of periodically cleaning the systems and the subsequent extension of their service life (about 10 years) were evaluated. |
| Scenario 3 – ‘Blue-Green Infrastructure (BGI) implementation’ |
In line with the regeneration plan for TM, this scenario examined the role that BGI can play in addressing flooding and improving co-benefits (e.g., ‘ecosystem quality’ and ‘residents’ well-being’). The hydrological benefit of BGI measured through surface runoff reduction and biodiversity performance was implemented from 2030 onwards. Specifically, intensive BG roofs, urban green avenues/woodlands, wetlands, parks, and lakes and canals re-naturalisation were introduced. |
