达卡是世界上人口最稠密的城市之一,随着建筑面积的扩大,以适应不断增长的人口的需求。快速的城市化减少了绿地,加剧了城市的热量和污染。为了追求更绿色、更健康的城市环境,屋顶农业已经成为一种有希望的解决方案,提供恢复环境和安全食品生产的机会。尽管有潜力,有限的研究已经探索了达卡这种替代绿化解决方案的可行性。因此,这项研究旨在使用地理信息系统(GIS)和多标准决策(MCDM)技术评估屋顶对农业活动的适用性。首先,根据文献选择了七个标准,比如建筑时代,高度,屋顶尺寸,建筑公用事业,属性值,阳光,和水的可用性。第二,使用最佳最差方法(BWM)进行了专家意见调查,以计算标准的权重。最后,达卡的适合性图是通过结合标准层得出的,随后进行了验证.屋顶面积和财产价值被确定为最重要和最不重要的标准。约9%(6.27km2),68%(46.59km2),22%(15.15km2),而达卡市的一个微不足道的部分(0.1平方公里)被列为高度合适的,合适,适度适合,不适合,分别,屋顶农业。通过确定和推广最适合屋顶农业的地点,并突出现有机会,这项研究将有助于启动和扩大可持续农业实践,有助于适应气候变化和城市韧性。
Dhaka ranks among the world\'s most densely populated cities, with built-up areas expanding to accommodate the demands of a growing population. The rapid urbanization has reduced green space and exacerbated urban heat and pollution in the city. In the quest for a greener and healthier urban environment, rooftop agriculture has emerged as a promising solution, offering opportunities for the restoration of the environment and safe food production. Despite its potential, limited studies have explored the viability of this alternative greening solution for Dhaka. Therefore, this study aims to assess the suitability of rooftops for agricultural activities employing Geographic Information System (GIS) and Multi-Criteria Decision Making (MCDM) techniques. First, seven criteria were selected based on the literature, such as building age, height, rooftop size, building utility, property value, sunlight, and water availability. Second, an expert opinion survey was conducted using the Best Worst Method (BWM) to calculate the criteria\'s weights. Finally, the suitability map for Dhaka was derived by combining the criteria layers and was subsequently validated. Rooftop area and property value were identified as the most and least important criteria. Approximately 9% (6.27 km2), 68% (46.59 km2), 22% (15.15 km2), and a negligible portion (0.1 km2) of Dhaka city has been classified as highly suitable, suitable, moderately suitable, and not suitable, respectively, for rooftop agriculture. By identifying and promoting the most suitable locations for rooftop agriculture and highlighting existing opportunities, this research will help to initiate and expand sustainable agriculture practices that can contribute to climate change adaptation and urban resilience.