Resilience | Water
UCCRTF supports a water resources study for New Clark City
New Clark City (NCC), an upcoming mixed-use township managed by the Bases Conversion and Development Authority (BCDA), is being developed with the vision of becoming a leading example of an environmentally sustainable, smart, and disaster-resilient city.
To realize this ambition, efficient and sustainable use of water resources is key. To this end, a Water Resources Study was prepared with the main objective of assessing groundwater and surface water availability within and near NCC.
The study, conducted by the Geoscience Foundation Inc. for BCDA, will feed into resource planning that will ensure there is sufficient water to serve NCC, which has an area of approximately 9,450 hectares and is located about 120 kilometers (km) north of Manila.
Sustainability is at the heart of the study. It proposes that NCC makes use of groundwater, surface water, and other water sources like reservoirs, wastewater recycling, and rainwater harvesting, to avoid resource depletion. The use of surface water, in particular, will ensure that deep aquifers are not exhausted, and resources can be sustainably maintained.
The study, supported by the Urban Climate Change Resilience Trust Fund (UCCRTF), is linked to the ADB Transaction Advisory Services of the Office of Public-Private Partnership for NCC, which looks at the structuring and tendering of infrastructure packages. In 2017 to 2018, UCCRTF financed – through the request of BCDA – the review of the NCC master plan, conduct of the River Study and recommendations, and the development of the Resilience Framework.
Climate change is also a major consideration in the study, as climate projections indicate a 10% increase in precipitation levels during rainy season and a 10% decrease during the dry season by 2036. Enough water should be stored in water tanks and reservoirs during the rainy season so that this can be used in the summer or dry season.
Image: Well drilling near NNC.
Credit: Marie Grace Patadlas, ADB Consultant
The two major rivers of NCC
The two major rivers in the NCC are the Cutcut and Bangot Rivers. The Bangot River is situated at the northern edge of NCC and is a tributary of the O’Donnell River. The confluence with the O’Donnell River is located about 1 km north from the Philippine Army Camp. To ensure the sustainable use of the Bangot and Cutcut Rivers, a water resources monitoring program will be established through the installation of depth gauge meters that will track changes in the river flows.
Based on the study, the water quality for the two rivers were found to be satisfactory and well within the prescribed limits even for Class AA water quality guidelines for drinking water supply. However, primary treatment, including disinfection, is required for the water to be distributed for drinking. Once this is developed, these rivers can produce about 32 million liters per day, which is sufficient for a medium-sized city.
Water rights for the two rivers were also applied with the National Water Resources Board on behalf of BCDA and are awaiting deliberations. The results of the study were incorporated into the “NCC 50-year Water Resources Masterplan”, the roadmap for NCC’s resilient water supply system. The plan is seen to be financially viable and is expected to yield economic benefits through increased water usage efficiency and greater equity in access to water, without comprising environmental sustainability and ensuring water availability for future usage.
Presenting the study to stakeholders
In April, a stakeholders’ consultation was held to present the results of the study and the proposed 50-year water resources master plan. The online consultation was attended by more than 60 participants representing industry stakeholders, ADB, BCDA, and the Foreign and Commonwealth Office of the United Kingdom. The discussions covered issues such as water reuse, water extraction from O’Donnell River, use of constructed wetlands and embedded rainwater canals for drainage and wastewater management, and feasibility of a centralized wastewater treatment plant.
On water reuse, the study indicated that this will only be suitable for non-potable uses such as for agriculture, aquifer recharge, aquaculture, firefighting, flushing of toilets, industrial cooling, parks and golf course watering, formation of wetlands for wildlife habitats, and recreational impoundments. As an alternative water source, the O’Donnell River is also being considered in case the use of Bangot River is not feasible. This will form part of the water development plan for NCC’s main water source in future phases.
As for wastewater management, the study recognizes that constructed wetlands and ponds through a series of bio-retention and bio-remediation systems will help reduce and control the amount of pollutants – such as fertilizers, pesticides, and sediment – that enter the waterways from open space run-off. A centralized sewerage treatment plant is being planned for NCC, and it will service the main development areas covering the National Government Administrative Center and the area handled by real estate firm Filinvest Land. However, given that the construction of the plant may take up to three years, the use of modular treatment plants, which can be immediately installed and can easily be expanded, will be considered as an interim solution.
Further review, vetting, and discussions with BCDA need to be made to align the recommendations with the NCC master plan given that there are ongoing developments in the area. Specifically, BCDA, locators, and water concessionaire need to discuss and establish projections that will shape the longer-term water policies and water infrastructure projects in the NCC.