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Utilization of Open Source Spatial Data for Landslide Susceptibility Mapping at Chittagong District of Bangladesh—An Appraisal for Disaster Risk Reduction and Mitigation Approach

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International Journal of Geosciences 2017年第4期8卷 577-598页

作者： Md. Ashraful Islam sanzida murshed S. M. Mainul Kabir Atikul Haque Farazi Md. Yousuf Gazi Israt Jahan Syed Humayun Akhter Department of Geology University of Dhaka Dhaka Bangladesh Department of Geology and Mining University of Barisal Barisal Bangladesh

Since creation of spatial data is a costly and time consuming process, researchers, in this domain, in most of the cases rely on open source spatial attributes for their specific purpose. Likewise, the present research aims at mapping landslide susceptibility at the metropolitan area of Chittagong district of Bangladesh utilizing obtainable open source spatial data from various web portals. In this regard, we targeted a study region where rainfall induced landslides reportedly causes causalities as well as property damage each year. In this study, however, we employed multi-criteria evaluation (MCE) technique i.e., heuristic, a knowledge driven approach based on expert opinions from various discipline for landslide susceptibility mapping combining nine causative factors—geomorphology, geology, land use/land cover (LULC), slope, aspect, plan curvature, drainage distance, relative relief and vegetation in geographic information system (GIS) environment. The final susceptibility map was devised into five hazard classes viz., very low, low, moderate, high, and very high, representing 22 km2 (13%), 90 km2 (53%);24 km2 (15%);22 km2 (13%) and 10 km2 (6%) areas respectively. This particular study might be beneficial to the local authorities and other stake-holders, concerned in disaster risk reduction and mitigation activities. Moreover this study can also be advantageous for risk sensitive land use planning in the study area.

关键词： Susceptibility Mapping Open Source Spatial Data Heuristic Model Chittagong Metropolitan Area Geographic Information System (GIS) Disaster Risk Reduction

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Management of Wilt Complex of Eggplant (Solanum melongenaL.) Caused by Fusarium oxysporum, Ralstonia solanacearumand Meloidogynespp.

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American Journal of Plant Sciences 2021年第7期12卷 1155-1171页

作者： Nahid Akter Mohammad Rafiqul Islam Mohammad Belal Hossain Mohammad Nazrul Islam Shukti Rani Chowdhury sanzida Hoque Rakibul Hasan Nitol Rubina Tasnin Department of Plant Pathology Sher-e-Bangla Agricultural University Sher-e-Bangla Nagar Bangladesh Plant Pathology Division Bangladesh Agricultural Research Institute Joydebpur Bangladesh

Wilt complex disease of eggplant is a severe problem in Bangladesh as well as in the world. The pathogenic variability and their survival nature make the disease complex. The pathogen includes a fungus (Fusarium oxysporum), a bacterium (Ralstonia solanacearum) and a nematode (Meloidogyne spp.) that attack the plant individually or combinedly. The present investigation aimed to evaluate the integrated effects of different chemicals, poultry manure and Trichoderma harzianum to manage the disease. Carbendazim (Autostin 50WP), Streptomycin sulphate 9% and Tetracycline hydrochloride 1% (Krosin 10SP) and Carbofuran (Furadan 3G) were used as a fungicide, bactericide and nematicide, respectively which were integrated with poultry manure and Trichoderma harzianum resulting in sixteen treatments. The treatment efficacy varied significantly in comparison to control in respect of wilt incidence, yield and yield contributing characters. No wilt incidence was observed where Trichoderma harzianum was applied individually or in combination with Furadan 3G, Krosin 10SP, Autostin 50WP and poultry manure. The highest yield increase (300%) over control was noted in the treatment where Krosin 10SP, Furadan 3G,

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