STORM WATER MANAGEMENT BY RAIN GARDENS seminar ppt

1. STORM WATER MANAGEMENT BY
RAIN GARDENS
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2. CONTENT
• Introduction
• Advantages
• Disadvantages
• Limitations
• Choosing a spot
• Installation process of rain garden
• Effects of poor storm water management
• Are rain gardens a good solution for storm water management?
• How does a rain garden reduce runoff?
• Main beneficial effect of rain gardens
• Rain gardens can improve soil ecology
• How effective a rain garden
• Conclusion
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3. INTRODUCTION
• A rain garden is an attractive Landscaping feature planted with Perennial native plants, It is a bowl
shaped garden designed to absorb Storm water run-off from impervious surfaces such as parking
lots and roofs
• Rain gardens acts as buffers by filtering storm water runoff and improving water quality before it
reaches storm drains that eventually flow in to streams , rivers and lakes
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4. ADVANTAGES
• Provides proper drainage of surface and avoids damages on infrastructure such as
private properties and streets.
• Provides possibility to recharge Groundwater and re-use Precipitation water and
surface run-off as irrigation or household.
• Minimizing health risks.
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5. DISADVANTAGES
• It depends on the technique, A lot of operation and labor required.
• There is clogging infiltration System caused by high sedimentation
rates.
• Expert planning, Implementation ,operation and maintenance
required for a storm water management
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Figure 1

7. LIMITATION
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SMART TUNNEL CAN ONLY MITIGATE FLOODING IN THE CITY CENTER
WHERE IT COVERS.
SMART TUNNEL CANNOT WORK BY ITSELF.
IT NEED TWO COMPONENTS

8. CHOOSING A SPOT
Avoid creating a rain garden too close to building foundations thismay lead to a leaky
basement.
Be aware of rights of way and underground service lines or utilities.
If your land slopes, you can create a flat area for your rain garden in several ways.
Don’t excavate an extensive rain garden under large trees.
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10. INSTALLATION PROCESS OF RAIN GARDEN
1. TO LOCK DOWN LOCATION OF UTILITIES PRIOR TO DIGGING.
2. TO LAY OUT SHAPE OF RAIN GARDEN WITH EQUIPMENT.
3. KILL OR REMOVE EXISTING TURF.
4. COMPOST AND SAND HAVE TO BE MIXED INTO STOCKPILE TOPSOIL.
5. MAKE SURE THE RAIN GARDEN IS LEVEL AND THE PROPER DEPTH. PUT
DOWN A 2-3 INCH LAYER OF SHREDDED HARDWOOD MULCH.
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11. EFFECTS OF POOR STORMWATER
MANAGEMENT
• Measures to be taken while planning and layout
• Measures to be taken while construction
• Structural form and internal layout
• Bomb shelter areas
• Installations
• Glazing and cladding
• Wrapping of columns
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12. ARE RAIN GARDENS A GOOD SOLUTION
FOR STORMWATER MANAGEMENT?
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As rain runoff travels to storm drains, rivers, and throughout our
watersheds, it picks up pollutants and sediment along the way. Soils,
fertilizers, pesticides, and other pollutants can wreak havoc on our
waterways and cause poor water quality in our communities.
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13. HOW DOES A RAIN GARDEN REDUCE
RUNOFF?
Reduces total stormwater runoff and peak low.
Stores rainwater which can be used for irrigation of gardens.
Increases groundwater recharge and helps in local aquifer replenishment.
Reduces property loss and activity disruption that is caused by excessive runoff.
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14. MAIN BENEFICIAL EFFECT OF RAIN
GARDENS
In our hot dry summers, a rain garden with deep rooted plants can maintain
soil moisture and keep plants alive longer than most other habitats,
Alleviates problems associated with flooding and drainage.
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15. RAIN GARDENS CAN IMPROVE SOIL
ECOLOGY
A rain garden diverts runoff into the garden, which allows it to soak
into the ground. As it goes into the ground, the environment works to
filter out toxic chemicals, thereby improving the quality of local water.
In addition to cleaning the water,
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16. HOW EFFECTIVE A RAIN GARDEN
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Rain gardens are effective in removing up to 90% of nutrients and
chemicals and up to 80% of sediments from the rainwater runoff.
Compared to a conventional lawn, rain gardens allow for 30%
more water to soak into the ground.
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17. CONCLUSION
Minimizing health risks.
Reducing the concentrations of pollutants in stormwater, thus
protecting the quality of the receiving water body.
Contributing to the enhanced amenity and aesthetic value of
developed areas.
Improving urban air quality.
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18. REFERENCE
• Andrew W. Sims (2015) Stormwater Management Performance of
Green Roofs,
• (The University of Western Ontario), Thesis and Dissertation
Repository, p.121
• [2] L. Jotte, G. Raspati, and K. Azrague (2017) Review of storm water
management
• practices - Raport, SINTEF Building and Infrastructure, Trondheim,
Norway
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THANK YOU