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This presentation is on conservation of urban water bodies. In the urban areas due to human interference and pollution the water bodies are highly polluted. Designs and methods are presented here, with biochar as one of the materials for treatment and rejuvenation of urban water bodies. Also presented the phytoremediation methods for conservation of water bodies. Overall some of the concepts improves the relationship between water and people by improving the overall ecosystem. Some of the methods presented here in this presentation are:
Rejuvenating water bodies : Reducing the emissions from foreshore area by application of biochar. Development of foreshore area by dredging. Biochar dykes for treating polluted water and creation of clean water zone in a water body.
Floatigation: Growing plants on water bodies using biochar and floats. These plants need not be watered as they take polluted water rich in nitrates, phosphates and other nutrients. The biochar and the plants together clean the water by this method. Floating gardens could be created using empty bottles (reuse) as floats. Recreation zones could be created on these floats – floating restaurants, walkways, boating, solar lights, fishing zones, habitat for birds, etc. In this method there is also scope for growing submergent, floating, emergent and terrestrial plants could be grown. The algal boom and eutrophication of the water bodies is prevented in this method. The reuse concept of bottles reduced the burden on the environment and improves the environment through plants.
The dredging material such as silt could be used for creating islands in the water bodies, which would be a useful for birds as habitat.
Sewagigation: The sewage from the cities entering into the water bodies pollute the water. Through sewagiation, the polluted sewage water is harvested through filtration using biochar, sand and gravel at the bottom of the sewerage system. This water is used for irrigating the avenue plants and gardening needs in the urban areas.
For recharging the groundwater in the perurban areas and rainwater harvesting around the urban areas, it is proposed to have annular / circular / segregated water harvesting structures. The elevated express roads / outer ring roads / regional ring roads / highways / etc. could be used as bunds for harvesting the water. Traditionally bunds are used as roads even now. Why not roads as bunds. The road runoff harvesting (as being promoted by MetaMeta) is also one of the important methods.
Using sensors for monitoring and management of water bodies is another important aspect to be implemented.