Rain gardens are one way to alleviate some of the pressure from water runoff. They act as sinks, absorbing the precipitation back into the soil where plants or trees can use it.
But there are other reasons to build a rain garden other than pollution and the regional water supply. These landscape features can also help properties control water run-off problems. There might be swampy parts of your yard near the roof drain. Or water may gather in the low parts of your yard during wetter seasons. Rain gardens can help drain and absorb some of this excess water runoff.If residents and businesses implemented rain gardens, they could fill in some of the funding gaps.
Aside from retaining the water locally, many plants in rain gardens also help filter excess nutrients that might run off from fertilizers in lawns and gardens. They can filter out some chemicals, stopping them from reaching waterways, and ultimately our oceans, throughThe region can vary the type of rain garden you might need as it depends on the local ecology and the amount of rain. But the general rain garden needs a base area of small rocks or sand.
“You basically want to dig a pit and put in materials to increase the drainage, then put in a layer of sand,” Deegan says. Depending on your aesthetic taste, you can either leave rocks exposed on the surface, or you can cover them in sand. You can also add some landscape fabric that keeps sand and other sediment in place. Next, you can lay down a layer of topsoil or mulch.
Taste and region may vary your plant options, depending on what’s suitable locally. Deegan says that ornamental grasses work well, but you could also plant flowers and shrubs. This would make it look more like a garden and less like a culvert or construction feature. Here’s one
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