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Chaqra, nestled within the Nabatîyé Governorate of Lebanon, occupies a geographically complex position in the southern Beqaa Valley. Situated at coordinates 33.1917°N, 35.4628°E, the city’s elevation contributes to unique microclimatic conditions. The surrounding landscape is predominantly hilly and mountainous, part of the broader Lebanese mountain range, transitioning into the more arid regions further east. This terrain significantly influences air quality, creating pockets where pollutants can become trapped, particularly during temperature inversions. Chaqra isn’t directly adjacent to the Mediterranean Sea, but its proximity (roughly 30km) means it experiences some maritime influence, though moderated by the intervening hills. The region is characterised by a mix of agricultural land – primarily olive groves, vineyards, and fruit orchards – and smaller-scale rural settlements. While not a major industrial hub itself, Chaqra’s air quality can be affected by transport emissions from regional routes and, potentially, agricultural practices like pesticide spraying and seasonal burning of agricultural waste. The urban-rural gradient is relatively sharp, with the city centre representing a concentrated source of localised pollution, diminishing with distance into the surrounding agricultural areas. Understanding these geographical factors is crucial for assessing and mitigating air quality challenges in Chaqra.

Chaqra’s air quality follows a distinct seasonal pattern, largely dictated by Lebanon’s Mediterranean climate. The summer months (June-August) often see a deterioration in air quality due to increased temperatures and stable atmospheric conditions, promoting the build-up of pollutants from vehicle traffic and potential agricultural sources. Dry conditions exacerbate dust resuspension, further impacting air quality. Autumn (September-November) brings a temporary improvement as cooler temperatures and increased rainfall help to cleanse the atmosphere. However, this period can also see localised smoke from the burning of agricultural residue after the harvest. Winter (December-February) is generally the period of best air quality, with frequent rainfall and cooler, more turbulent air dispersing pollutants. However, temperature inversions, common in valleys like the Beqaa, can trap pollutants, leading to localised poor air quality episodes. Spring (March-May) sees a gradual increase in pollution as temperatures rise and agricultural activity intensifies. Sensitive individuals – children, the elderly, and those with respiratory conditions – should be particularly cautious during the summer and autumn months, limiting strenuous outdoor activity on days with poor visibility. Monitoring wind patterns is key; winds from the east can carry pollutants from more industrialised areas.