Biodiversity parks make the most of the monsoons, harvest 1.4 million gallons | Delhi News

New Delhi: A recent ecological survey found that 1.4 million gallons of rainwater were collected by the seven biodiversity parks of the Delhi Development Authority (DDA) during the monsoon season between July and September this year. The survey was carried out by the employees of the biodiversity parks.
The amount of water stored in the surface waters of four biodiversity parks is nearly 1,100 million gallons. Biodiversity parks officials said the survey was first conducted to determine the role of these parks in conserving water resources in Delhi.
The biodiversity parks efficiently collect rainwater through tree tops and ground vegetation, especially various grasses. They store the water obtained and effectively recharge the groundwater. The DDA Biodiversity Parks with three-story forest communities have treetops that reach a height of 35-45 feet and act as rainwater collectors with around 1,500 plant species. “The precipitation that falls on the dense, closed treetops of the three-story forest communities absorbs considerable amounts of rainwater and slowly releases the water from the treetops to the ground, where it seeps away. The canopies act like a sponge to hold back and release rainwater that falls on vegetation, ”said CR Babu, Professor Emeritus, Center for Environmental Management of Degraded Ecosystems (CEMDE), DU.
Aside from the treetops, the rock systems in some of the biodiversity parks such as Northern Ridge, Aravalli, Tilpath and Tughlaqabad help in the harvesting of rainwater. “The precipitation that falls on the ground quickly seeps away through joints and cracks in the rock system and finally ends up in aquifers, which are the source of water for large parts of South Delhi. There are also charging pits, shallow depressions and shallow valleys where surface runoff from the surrounding catchment areas penetrates these deep recesses and charges the aquifers. When these deep recesses have impenetrable layers, the water is stored and slowly released into the aquifer. These landscapes are covered with grasses and a few shrubs and a few scattered native trees, ”said Babu.
To calculate the amount of water collected by these biodiversity parks, their area and the rainfall data recorded during this monsoons were taken into account. Faiyaz Khudsar, scientist at the Biodiversity Park Program, said: “The biodiversity parks help recharge aquifers and reduce soil erosion.”
These parks also help improve the quality of the environment, including filtering air pollutants, particularly PM10 and PM2.5, from point and non-point sources. Shah Hussain, responsible ecologist and scientist at Aravalli Biodiversity Park, said: “The vegetation, plants and animals in the biodiversity parks form biomass. In addition, the vegetation acts as a filter when trapping pollutants. ”
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