The Ganesh festival originally carried a deep connection to seasonal water cycles, lake cleaning, and maintenance. However, with modern urbanization, managing urban lake ecosystems demands strategies tailored to present-day realities. Restoration dynamics for urban lakes differ significantly from those for rural bodies.
Based on my 12 years of hands-on lake restoration experience in Hyderabad, the environmental reality of idol immersion in urban lakes requires a practical evaluation:
- Perennial Lake Depth & Retrieval Dynamics: Most urban lakes in Hyderabad are no longer seasonal shallow ponds; they remain perennial bodies with depths often exceeding 3 meters. In deep water, large clay idols dissolve into dense sludge on the lakebed, accelerating siltation and reducing storage capacity. Conversely, larger unpainted Plaster of Paris (PoP) idols retain structural stability, making them significantly easier for mechanical cranes to extract fully from the lake within 24 to 48 hours.
- Siltation & Water Quality: Urban lakes heavily impacted by sewage inflows already face high nutrient levels. While clay does not directly cause eutrophication (which is driven by organic nutrients like nitrogen and phosphorus), introducing massive volumes of clay increases suspended solids and bed siltation, smothering benthic flora.
- Strict Immersion Protocols:
o Large Idols (>1 ft): If used, large idols must be unpainted and restricted to designated zones with guaranteed post-immersion mechanical retrieval within days.
o Small Idols: All small idols—whether clay or PoP—should be strictly immersed in artificial Nimajjanam (immersion) tanks or home containers, keeping them out of natural lake bodies entirely.
- Eco-Material Considerations: Alternatives like charcoal or natural alum offer non-toxic options, but organic bases like atta (wheat flour) should be avoided in natural lakes, as decomposing organic flour drastically increases Biological Oxygen Demand (BOD).
Sustainable celebration requires aligning traditional practices with urban lake hydrology—ensuring zero permanent debris remains in our water bodies post-festival.
A request to all Hyderabad Citizens-
Madhulika Choudhary
Dhruvansh organization
