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50 backyard rain garden design 51 overview of practice a rain garden a small bioretention area is a depressed area in the landscape designed to retain and infiltrate stormwater runoff figures 51 and 52.
Rain garden design cross section. See more ideas about rain garden garden and garden design. Rain garden design tips. Rain gardens are landscape features usually emphasizing native plantings that are designed to capture storm water runoff and allow it to filter into the soil and potentially groundwater below. A rain garden should not be built over buried utilities or where mature plants could obstruct overhead utilities or drivers vision.
Include the number of plants of each species to be installed. The simplest form of rain garden is a shallow depression located downslope from impervious surfaces. Jan 4 2017 photos illustrations ideas for actual rain gardens used for stormwater filtration. Because the rain water ultimately soaks into soil it helps recharge local ground water supplies.
The soil and root systems of plants in the rain garden filter the runoff cleansing it from pollutants. Most rain garden designs comprise a simple saucer shaped depression filled with plants. Is known as water sensitive urban design wsud. Think of a rain garden just like a border or foundation planting rather than a beloved specimen tree.
The depression slows stormwater runoff catching cooling and absorbing it into the earth. Interested in functional use made aesthetically appealing. Consider all the rules of composition screening and circulationnot just the rule that says to put a rain garden in a low spot 10 feet from the house. Rain garden cross section rain garden soil mix depth 12 to 24 recommended 1 2 oerflv ow ilnf ow water flowing off hard surfaces for example a roof or driveway can be delivered to the rain garden through a swale lined with decorative rock or plants through a pipe or across a landscaped area.
See more ideas about rain garden garden design garden. Other names for this type of feature are bioswale bioinfiltration pond and bioretention area. Figure 2 it should not be built within 10 feet of foundation walls or on poorly drained sites. Rain gardens offer an attractive versatile and multi functional option for stormwater treatment.
The rainwater enters the soil and drains away. Eitgx s in soil gradual side slopes 21 maximum tofacep sur of muchyerl la ponding. Cross section of rain garden. In other words it should not be a stand alone feature.
The term rain garden is wide ranging and has been used to describe a number of different features see why rain gardens. Any modifications to an approved planting plan due to lack of plant. Rain gardens can sometimes be installed without the help of heavy equipment although a. However for the purposes of this guide a rain garden is a simple intervention designed to receive rainwater which has come from a downpipe or a large do mestic paved area.
Cross section of the rain garden including layer types and depths see example below treatment volume sizing calculation planting plan plant list and planting plan with latin names.
