Assessment of the Climate Change Impact on a Dry Detention Pond at Kota Damansara, Malaysia

Global warming and climate change have captured more public concern in the recent years. In Malaysia, studies found that extreme water events such as floods and droughts have shown significant changes in intensity and frequency of their occurrences. An initiative has been undertaken to study the performance of the dry detention pond in controlling water quantity under the impact of climate change by using numerical modelling approaches for the research site at Kota Damansara, Malaysia. InfoWorks collection system was applied to develop drainage system model. The collected hydrologic, hydraulic data, soil parameter and cross sections of main drains were among the essential inputs for modelling. The developed model was then validated, calibrated and verified to achieve certain level of confidence for further simulations and analysis. A comparison was carried out to predict the impact of climate change for various return periods on the detention pond. The study indicated the capability of using numerical approaches in predicting the impacts of climate change under different return periods. From the prediction finding, it was expected that a proper development planning could probably be achieved to manage and minimise the possible impacts of climate change.