Rain Garden

We all know that the urban storm water is one of the environmental challenges we are facing today. The storm water runoff will cause the serious issue such as flooding and the pollutant will enter city waterway. The storm water runoff carries heavy metals, nutrients, oil and other pollutants from the urban landscape. Every year, there are nearly 3,000 tones of storm water pollutants enters into Sydney’s waterways, it is very harmful to the environment.

The storm water management plays an important role in urban planning. However, the cost and material used to build and maintain these ‘grey’ storm water infrastructure will cause great expense environmentally and financially. 

In this situation, construction of rain garden is one of the possible solution to lighten this problem. When rain falls in rain garden, the water is absorbed and filtered by soil and plants. Storm water runoff is therefore cleaner before entering our waterways. Green infrastructure uses vegetation, soils, and other elements and practices to restore some of the natural processes required to manage water and create healthier urban environments.

Reference:

http://www.chesapeakebay.net/issues/issue/stormwater_runoff

http://www.watertechonline.com/group-presents-strategies-to-manage-urban-stormwater-runoff-as-el-nino-nears/

http://www.lsrca.on.ca/programs/rainscaping/LID-raingardens.php