JABEL HAFEET POND FOR STORM WATER NETWORK PROJECT IN AL AIN

M/s. Abu Dhabi General Services Company PJSC (Musanada), on behalf of the M/s. Abu Dhabi Housing Authority (ADHA) appointed M/s. CORE Engineering Consultancy LLC to do a detailed design of External Storm and Irrigation Connection to Jebel Hafeet and Ain Al Faydah Developments. Accordingly, the designer proposed concept design options of stormwater discharge ponds strategy to the relevant project stakeholders, which mainly involved the construction of two massive ponds within Ain Al Fayda & Jabel Hafeet locations, near to the ongoing Emirati Housing Development project. The size of the pond is significant due to the large volume of stormwater expected from a 1 in 25 years storm as well as from groundwater recharge. The proposed Jabel Hafeet pond is rectangular with dimensions 250m x 75m (length x width). The pond design was to be done entirely as a trench by excavating 6m from the existing ground level. Since the original groundwater level is approximately 3m below the current ground level at the pond location and that the total wall height is 6m, the lining solution has a pivotal role of allowing groundwater recharge into the pool without developing pore water pressure within the backfill side. However, the original tender answer was a Segmental block reinforced soil wall system, which is ineffective due to the lack of flexibility and porosity of its facia.