Stormwater runoff from urban areas is a source of water pollution. In the past, rainwater was soaked into the ground, where it filtered into the groundwater firmament. It also evaporated from puddles or was lost from plants through evapotranspiration.
However, a boom in urban development brought more impervious surfaces like roads and walkways that feature drainage systems. Such drainages ensure the effective evacuation of stormwater from urban areas. Unfortunately, this means that more water makes it into our waterways and reservoirs, especially after a massive storm.
Here are some of the harmful effects of stormwater on our water supply.
Increased Flooding in Wetlands
Effective drainage systems ensure that urban areas stay dry. However, most of this water ends up flooding and polluting the rivers. This makes them unsafe to swim. Therefore, people can use this time to play all slots mobile games on their favourite online casino until it’s safe to swim again. Such flooding can also have other permanent effects like soil erosion and changing the course of rivers.
Increased Rates of Algae Bloom
Fertilizers and other agricultural supplements are some of the sediments that stormwater transports to water bodies. These compounds can end up in stagnant water sources and enrich algae and moss, causing an exponential increase. This chokes up all the other plants and fish that live in the water bodies. The moss and algae also release toxic substances that pollute the water, making it undrinkable.
Introduces Toxins Into Water Bodies
Stormwater carries a variety of toxins from urban areas and deposits them into water bodies. Such contaminants include detergents, oils, grease, waste from landfill and anything that leaks from septic tanks. Such compounds make it into water bodies. Such a situation is compounded when the water source happens to be a natural lake or reservoir. With time there’s a sharp increase in heavy metals and other substances that make the water undrinkable.