Academic Journal
Mapping flood prone and Hazards Areas in rural landscape using landsat images and random forest classification: Case study of Nasia watershed in Ghana
| العنوان: | Mapping flood prone and Hazards Areas in rural landscape using landsat images and random forest classification: Case study of Nasia watershed in Ghana |
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| المؤلفون: | Benjamin Ghansah, Clement Nyamekye, Seth Owusu, Emmanuel Agyapong |
| المصدر: | Cogent Engineering, Vol 8, Iss 1 (2021) |
| بيانات النشر: | Taylor & Francis Group, 2021. |
| سنة النشر: | 2021 |
| المجموعة: | LCC:Engineering (General). Civil engineering (General) |
| مصطلحات موضوعية: | random forest, landsat images, flood prone and flood hazard, nasia river, rural landscape, Engineering (General). Civil engineering (General), TA1-2040 |
| الوصف: | Floods are hazard which poses immense threat to life and property. Identifying flood-prone areas, will enhance flood mitigation and proper land use planning of affected areas. However, lack of resources, the sizable extent of rural settlements, and the evolving complexities of contemporary flood models have hindered flood hazard mapping of the rural areas in Ghana. This study used supervised Random Forest (RF) classification, Landsat 8 OLI, and Landsat 7 ETM + images to produce flood prone, Land Use Land Cover (LULC), and flood hazard maps of the Nasia Watershed in Ghana. The results indicated that about 418.82 km2 area of the watershed is flooded every 2–3 years (normal flooding) and about 689.61 km2 is flooded every 7–10 years (extreme flooding). The LULC classification produced an overall accuracy of 92.31% and kappa of 0.9. The flood hazard map indicated that land areas within hazard zones of the river include the Nasia community, Flood Recession Agricultural (FRA), rainfed and woodlands. When compared with a Modified Normalized Difference Water Index (MNDWI), the RF supervised classification had an edge over the MNDWI in estimating the flooded areas. The results from this study can be used by local administrators, national flood disaster management and researchers for flood mitigation and land use planning within the watershed. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 2331-1916 23311916 |
| Relation: | https://doaj.org/toc/2331-1916 |
| DOI: | 10.1080/23311916.2021.1923384 |
| URL الوصول: | https://doaj.org/article/f0e5a2a4b4f04d54afb111a9f77ca884 |
| رقم الانضمام: | edsdoj.f0e5a2a4b4f04d54afb111a9f77ca884 |
| قاعدة البيانات: | Directory of Open Access Journals |
| تدمد: | 23311916 |
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| DOI: | 10.1080/23311916.2021.1923384 |