将这种反复无常的天气归因于2022年7月至9月在喀麦隆西南部沿海平原的kumba和mutengenen -likomba聚集的前所未有的洪水灾害

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摘要

反复发生的洪水是全球范围内最普遍、最普遍和最严重的自然灾害,特别是在低洼和陡峭的斜坡地区。Kumba, Mutengene和Tiko定居点所覆盖的区域空间具有这些特征景观和常见的洪水事件,但7月至9月,8月至2022年的洪水不仅打破了记录,而且在本质上有些神秘。这项研究试图对水文气候灾难的可能触发因素进行深入研究。本研究采用定量与定性相结合的混合研究设计。通过受灾地区直接和间接实地观测的实证研究方法,获得了洪水情景维度、驱动因素的初步数据。日、月、年气候数据来源于NASA卫星数据库,通过分析得到降雨强度和分布模式。通过对2000 - 2022年卫星影像的GIS分析,建立了土地覆被和土地利用变化检测。通过对洪水灾区的探索性调查,获得了洪水事件的影响。结果显示,2022年7月和9月特大洪水的主要触发机制是与多年来的综合效应有关的景观自然平衡的破坏,一年中较少几个月的高降雨量加剧,以及由于不受控制的土地覆盖和土地利用突变导致的景观脆弱性加剧,这些变化迫使自然水道方式的人为殖民。在某种程度上,当地的适应措施,如抬高地基和沙袋堤防,在洪水面前显得微不足道。所记录的影响深远的后果是通讯线路、基础设施、耕地和牧场的破坏以及山体滑坡对景观的破坏。报告建议,适当的土地使用规划和改善排水系统是应对这种情况的可持续预防灵丹妙药。
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Ascribing the capricious weather thes is to the unprecedented july-september 2022 flood hazards in the kumba and mutengene-likomba agglomerations of the south west cameroon coastal plain of cameroon
Recurring flood scenarios are globally, the most endemic, ubiquitous and dramatic natural hazards especially on low-lying and steep sloping areas. The area space covered by the settlements of Kumba, Mutengene and Tiko have these characteristic landscapes and flooding events common but those of July to September August to 2022 were not only record breaking but somewhat enigmatic in nature. This study sought to make an in-depth examination of probable triggers of the hydroclimatic catastrophe. The study adopted the mixed research design combining both quantitative and qualitative techniques. Primary data on the dimension of the flooding scenarios, the drivers were obtained through empirical research methods of direct and indirect field observations of affected areas. Daily, monthly and annual climatic data were sourced from NASA satellite database, and analysed to obtain temporal rainfall intensities and distribution patterns. Change detection of landcover and land uses were established through GIS analysis of satellite images between year 2000 and 2022. Impacts of the flood events were obtained through an exploratory survey of the flood impacted zones. The results revealed the principal trigger mechanism of the cataclysmic floods of July and September 2022 to be the disruption of the natural balance of the landscape linked to combined effects over the years, of intensifying high rainfall concentration within fewer months of the year, and the heightened vulnerability of the landscape due to uncontrolled land cover and land use mutations that have coerced anthropic colonisation of natural water course ways, to the extent that indigenous adaptation measures as raised foundations and sand bag embankments were dwarfed by the flood waters.Far reaching consequences registered were destruction of communication lines, infrastructural facilities, arable and pastoral farmlands and landscape spoliation by landslides. The recommends proper land use planning and improvement of drains systems as the sustainable preventive panacea to such a situation.
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