With severe flooding continuing to threaten urban areas in the Philippines, Department of Environment and Natural Resources (DENR) Secretary Raphael P.M. Lotilla has identified rainwater harvesting as a practical and immediately actionable measure for households.
Secretary Lotilla underscored that, while large-scale infrastructure projects remain important, household-level interventions such as rainwater harvesting can play a significant role in alleviating pressure on city drainage systems during periods of heavy rainfall.
“Harvesting rainwater at the household and community level provides an immediate way to reduce the pressure on clogged city drains. Every volume helps. By capturing rain from rooftops before it hits the ground, the total volume of water entering the streets is reduced, and the moment when drainage pipes are most likely to burst or overflow is significantly delayed,” he said.
The DENR recommended that residents regularly inspect and clean gutters to maintain unobstructed rainwater flow.
Installing a diverter or downspout bypass enables the collection of rainwater in storage containers, such as a 200-liter drum or rain barrel positioned on a stable base.
Covering the container with fine mesh prevents mosquito breeding and debris accumulation.
A hose attached to the base of the container allows for the use of stored water in non-potable applications, including watering plants, cleaning outdoor areas, and flushing toilets.
By diverting rainwater from drainage systems during storms, households can both reduce the risk of urban flooding and conserve water for routine domestic purposes.
“Rainwater harvesting, in simple terms, is one way to prevent heavy rainwater from flooding our streets. It also helps us conserve water for better utilization. It may not be best for drinking but it can surely help in chores, such as watering plants and washing vehicles,” said Raul Lorilla, Regional Executive Director of DENR VI, echoing Secretary Lotilla’s message.
Lorilla also highlighted the importance of practicing rainwater collection year-round.
“Climate change and the intensity of sun rays have a big impact on our daily activities, especially in water resources. Let us practice rainwater collection not just during El Niño but all year round,” he said.
The DENR’s promotion of household-level rainwater harvesting is intended to complement ongoing infrastructure initiatives and to encourage proactive environmental management within urban communities.IMT
