MODIS-Based Investigation of Flood Areas in Southern Cambodia from 2002–2013
AbstractIn Cambodia and the Vietnamese Mekong Delta, floods commonly occur during the rainy season, and a better understanding of their spatio-temporal distribution is important for both disaster prevention and the improvement of agricultural production. This study investigated spatio-temporal flood inundation and land cover change from 2002 to 2013 in the southern part of Cambodia using Terra satellite on-board Moderate Resolution Imaging Spectroradiometer (MODIS) images. The algorithm for flood inundation detection, WFFI (Wavelet-based Filter for detecting spatio-temporal changes in Flood Inundation) was used, and the parameters were modified to fit the present study. The estimated inundation areas were validated using eight Landsat images. In a comparison between the original and modified WFFIs, the modified WFFI (70–96%) exhibited better accuracy than the original WFFI (30–70%). Overall, the temporal change in the flood inundation area presented a decreasing trend, and a link to the in-situ observed water level showed a decreasing trend during the rainy season. Furthermore, the estimated flood inundation exhibited a significant delay since 2008. Based on the yearly land cover MODIS product, the permanent water body and wetland areas decreased, whereas the cropland areas increased. This was as a result of increased agricultural productivity. However, water shortage was the major obstacle to increasing agricultural productivity, and it also had a negative impact on aquatic ecology, such as fish spawning grounds. View Full-Text
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Vichet, N.; Kawamura, K.; Trong, D.P.; On, N.V.; Gong, Z.; Lim, J.; Khom, S.; Bunly, C. MODIS-Based Investigation of Flood Areas in Southern Cambodia from 2002–2013. Environments 2019, 6, 57.
Vichet N, Kawamura K, Trong DP, On NV, Gong Z, Lim J, Khom S, Bunly C. MODIS-Based Investigation of Flood Areas in Southern Cambodia from 2002–2013. Environments. 2019; 6(5):57.Chicago/Turabian Style
Vichet, Nguon; Kawamura, Kensuke; Trong, Dung P.; On, Nguyen V.; Gong, Zhe; Lim, Jihyun; Khom, Sok; Bunly, Chhun. 2019. "MODIS-Based Investigation of Flood Areas in Southern Cambodia from 2002–2013." Environments 6, no. 5: 57.
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