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Mangalampudūr, nestled in the Tiruchirappalli district of Tamil Nadu, India, occupies a geographically significant position within the Kaveri Delta, a fertile and densely populated region. Located at approximately 10.8167° N latitude and 76.6500° E longitude, the town sits at a modest elevation, contributing to a relatively flat terrain characteristic of the deltaic plains. The surrounding landscape is predominantly agricultural, with extensive rice paddies and other crops dominating the view, reflecting the region's reliance on irrigation from the Kaveri River. This proximity to the river, while vital for agriculture, can also influence local air quality through the release of agricultural emissions, including ammonia from fertilizers and particulate matter from crop residue burning, particularly during harvest seasons. The urban–rural gradient around Mangalampudūr is gradual; the town itself is a small, primarily residential settlement, transitioning seamlessly into the surrounding agricultural fields. While not directly adjacent to major industrial belts, its location within the broader Tiruchirappalli region means it is indirectly influenced by industrial activity further afield. The delta's flat topography and prevailing wind patterns can facilitate the transport of pollutants from these sources. The climate is tropical, with hot and humid conditions throughout much of the year, which can exacerbate the effects of air pollution by trapping pollutants closer to the ground. The lack of significant topographical barriers means that pollutants are not easily dispersed, potentially leading to localized air quality challenges.

Mangalampudūr’s air quality experiences a distinct seasonal cycle dictated by the region’s tropical climate and agricultural practices. The pre-monsoon season (March-May) typically witnesses a gradual increase in pollution levels. Rising temperatures and decreasing rainfall create stable atmospheric conditions, often leading to temperature inversions where cooler air is trapped beneath a layer of warmer air, preventing vertical mixing and concentrating pollutants near the ground. Agricultural burning, a common practice to clear fields for the next planting season, significantly contributes to particulate matter pollution during this period. The monsoon season (June-September) brings relief, with heavy rainfall effectively washing away pollutants and strong winds dispersing any remaining emissions. This is generally the most favourable time for outdoor activities. The post-monsoon season (October-November) sees a return to drier conditions, and a resurgence of agricultural burning as farmers prepare for the rabi crop, again elevating particulate matter. Winter months (December-February) are characterized by cooler temperatures and occasional fog, which can trap pollutants and reduce visibility. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should exercise caution during the pre-monsoon and post-monsoon seasons, limiting prolonged outdoor exposure and avoiding areas with visible smoke. Maintaining indoor air quality through ventilation and air purifiers can also be beneficial. The intensity of agricultural burning is a key factor, and local authorities’ enforcement of regulations regarding crop residue management plays a crucial role in mitigating air quality impacts.