How can a developer of a large subdivision minimize storm runoff?

A developer of a large subdivision can effectively minimize storm runoff by including stormwater detention or retention basins. These basins are designed to capture and hold excess stormwater runoff, thereby reducing the volume and peak flow that would enter the drainage system or natural water bodies during heavy rain events. Detention basins temporarily hold water and release it slowly, while retention basins may permanently store some water and help filter pollutants, ultimately improving the quality of the water that is discharged.

Incorporating these basins into a development's design is a crucial aspect of sustainable stormwater management practices. This strategy not only helps alleviate the potential for flooding but also mitigates erosion and the impacts on downstream water bodies.

The other options suggest approaches that would likely increase stormwater runoff rather than manage it. Increasing impermeable surfaces or reducing green spaces would limit the land's ability to absorb water, while allowing unrestricted stormwater flow could overwhelm drainage systems and lead to flooding.