Which of the following is a common indicator of poor stormwater management?

Streambank erosion serves as a common indicator of poor stormwater management because it signifies that the flow of water is not being effectively controlled or managed. When stormwater runoff is not properly directed, it can lead to increased flow velocities, which erode soil and vegetation along streambanks, ultimately destabilizing those areas. The erosion process can strip away the vegetation that serves as a natural buffer, further exacerbating the problem and leading to negative impacts on water quality, habitat loss, and channel alteration.

In the context of stormwater management, effective practices are designed to minimize runoff, control flooding, and retain stormwater on-site to recharge groundwater, thereby preventing these erosive conditions. Observing significant streambank erosion indicates that the measures in place—if any—are insufficient for maintaining the health of the watershed, thus highlighting ongoing issues with stormwater management strategies.