Stormwater harvesting can help reduce flooding by capturing and storing rainwater before it becomes runoff that overwhelms drainage systems. In urban areas with large paved surfaces, rainwater can quickly accumulate and lead to localized flooding, especially during heavy storms. By diverting stormwater into tanks, ponds, or infiltration systems, harvesting reduces the volume and speed of runoff entering storm drains and natural waterways.
This not only lowers the risk of flash flooding but also decreases erosion and pollutant transport into nearby rivers and lakes. When designed properly, stormwater harvesting systems provide controlled release or reuse of water, easing the burden on existing infrastructure. This approach is especially effective when used as part of a broader stormwater management plan that includes green infrastructure and permeable surfaces.
