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Al Qiţena, nestled within the White Nile State of Sudan, occupies a geographically significant position along the banks of the White Nile River. Its coordinates (14.8648, 32.3668) place it within a savanna ecosystem, characterized by gently undulating plains and scattered acacia woodlands. The city’s terrain is relatively flat, typical of the Nile floodplain, with an elevation averaging around 380 meters above sea level. This low elevation, combined with the river’s presence, contributes to a humid subtropical climate, influencing local weather patterns and, consequently, air quality. The surrounding landscape is predominantly agricultural, with extensive fields dedicated to sorghum, millet, and groundnuts, forming a gradual urban-rural gradient extending outwards from Al Qiţena. While the city itself is relatively small, with a population of approximately 26,893, its proximity to larger agricultural zones means that agricultural practices, including burning of crop residues, can contribute to localized air pollution events. There are no major industrial belts immediately adjacent to Al Qiţena, but the river serves as a vital transportation artery, potentially leading to emissions from river traffic. The White Nile’s influence moderates temperatures, but also introduces humidity, which can affect the dispersion of pollutants. The relatively open savanna environment generally allows for good air circulation, but stagnant conditions can occur, particularly during certain times of the year, exacerbating air quality issues. The city’s location within a broad, flat plain limits topographic influences on air flow.

Al Qiţena experiences a distinct wet and dry season pattern, significantly impacting its air quality. The dry season, typically spanning from November to April, is characterized by lower humidity and increased sunshine. While this might seem beneficial, the lack of rainfall allows dust and particulate matter to accumulate, leading to periods of elevated air quality concerns. Wind patterns during this period can be variable; strong, dry winds can stir up dust from agricultural fields and unpaved roads, while periods of calm can trap pollutants near the ground. Temperature inversions, where cooler air is trapped beneath a layer of warmer air, are less frequent but can occur, further hindering pollutant dispersal. The wet season, from May to October, brings more frequent rainfall, which naturally helps to cleanse the atmosphere by washing away particulate matter. However, heavy rainfall can also lead to flooding, potentially releasing pollutants from inundated areas. The increased humidity during the wet season can also affect the chemical composition of pollutants. During the transition months (April/May and October/November), air quality can be particularly variable, influenced by shifting wind patterns and the interplay between dry and wet season conditions. Sensitive groups, such as children, the elderly, and individuals with respiratory conditions, should exercise caution during the dry season, particularly when dust storms are anticipated. Outdoor activities are generally more favorable during the wet season, although vigilance regarding potential flooding is advised. Agricultural burning, a common practice after harvests, can significantly degrade air quality during the transition periods, so local advisories should be monitored.