Author(s): Helene Boisgontier; Laurene Bouaziz; Peter Nelemans; Joost Buitink; Mark Hegnauer; Michael O’Hanrahan; Ron Passchier
Linked Author(s): Helene Boisgontier
Keywords: Nature-based solutions hydrological modelling Hindu Kush Himalay
Abstract: Nature-based solutions (NBS) offer a promising approach by combining sustainable water management with enhancing climate resilience. In this study, we quantify the potential of NBS to improve the hydrological resilience under future climate scenarios in several sub-catchments of the Hindu Kush Himalayas, by integrating specific NBS processes into the wflow_sbm hydrological model. We first developed and calibrated wflow_sbm models for each sub-catchment using historical hydrological and meteorological data to simulate baseline conditions without NBS. A set of global circulation models (GCMs) and climate scenarios were then used to generate future meteorological inputs, allowing us to evaluate the potential impacts of climate change on the hydrology of the selected sub-catchments. Next, we conceptually incorporated NBS interventions such as water retention measures, reinfiltration strategies, and land use changes, into the wflow_sbm models of the sub-catchments. These interventions were subsequently assessed under the same future climate scenarios to quantify their impacts on flow regimes, water availability, peak discharges, and groundwater recharge. Results show that NBS have the potential to reduce water stress and peak flow events, particularly in vulnerable catchments, highlighting their critical role in sustainable water management under changing climate conditions. This study underscores the importance of incorporating NBS into hydrological models and regional water management strategies, particularly in regions facing climate-induced hydrological changes.
Year: 2025