PurposeThis paper aims to describe the major causes of massive destruction due to floods in developing countries and to elaborate the usefulness of flood hazard maps under the framework of community‐based flood management.Design/methodology/approachThis paper elaborates the usefulness of flood hazard maps and their application.FindingsIt is a clear perception that flood risk management cannot be treated in isolation – rather it should be a part of community development. In this context, it is essential to build a community's capacity to understand their vulnerabilities, strategies, activities and the role they could play in managing flood risks without relying on external entities. Therefore the proposed community‐based flood hazard‐mapping technique can be a good solution for addressing current issues. The approach will not only focus on the effective development and application of FHM but also it will correct the defects of the top‐down approach in disaster planning and also encourage all stakeholders' participation in an integrated and sustainable manner.Practical implicationsBased on the findings, it is strongly recommended that agencies should adhere and incorporate the idea while developing programs and projects for communities. In addition, It is simple to understand and easy to implement by the community.Originality/valueIt is hoped that the idea will be beneficial and a catalyst to promote a community's response for flood disaster management in developing countries, thereby helping agencies to develop an operational strategy in advance.

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We have observed the use of TWA by Carassius auratus langsdorfii as a spawning ground and tried to relate their spawning behaviors to the physical condition of TWA. A Hydraulic model was employed to presume the flooding condition. Also consider was a riverbed conditions. Following results are obtained as necessary conditions for TWA to be a good spawning ground for Carassius auratus langsdorfii.TWA should be connected to main river flow during spawning periods. Flow velocity in the TWA should be slow enough for Carassius auratus langsdorfii' to be able to spawn. TWA should not be inundated thoroughly such that Carassius auratus langsdorfii can find spawning base(i.e. aquatic vegetation). These result imply that serious of TWA which are located at various relative elevations can provide good spawning site for Carassius auratus langsdorfii because water level of Chikuma river fluctuate dramatically.