Abstract Social networks and public supports have been becoming increasingly important in disaster management and mitigation. This paper demonstrates empirical and credible evidence of social network supports and their spatial and temporal dynamics of evolutionary patterns in flood disaster preparedness and recovery, as demonstrated by the case of the 2017 mass-flooding event in rural areas of Sri Lanka. For the case study, a number of flood-inundated households from several rural areas of Sri Lanka were selected for a questionnaire survey. Furthermore, semi-structured interviews, focus group discussions, and field observations were conducted to collect empirical data regarding social networking for different phases of the flood. The results reveal the significant empirical finding that social support networks play a crucial role for flood disaster preparedness and recovery before, during, and after flooding events. Social networks also play a role in the provision of information, food, water, and other basic needs including evacuation and moving-out belongings, provision of shelters, and cleaning up contaminated houses and public places, which are helpfully exchanged for securing and reviving flood-affected livelihoods. More importantly, network characteristics have changed over time for disaster phases; additionally, evolutionary changes in network connections have occurred in different geographic settings.

中文翻译：

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用于洪水灾害响应和恢复的社会网络动态演化的地理学

摘要 社会网络和公众支持在灾害管理和减灾中变得越来越重要。本文以 2017 年斯里兰卡农村地区的大规模洪水事件为例，证明了社会网络支持及其在洪水灾害准备和恢复中演变模式的时空动态的经验和可信证据。在案例研究中，我们选择了斯里兰卡几个农村地区的一些被洪水淹没的家庭进行问卷调查。此外，还进行了半结构化访谈、焦点小组讨论和实地观察，以收集有关洪水不同阶段社交网络的经验数据。结果揭示了重要的实证发现，即社会支持网络在洪水事件之前、期间和之后对洪水灾害的准备和恢复起着至关重要的作用。社交网络还在提供信息、食物、水和其他基本需求方面发挥作用，包括疏散和搬出物品、提供庇护所以及清理受污染的房屋和公共场所，这些有助于确保和恢复洪水- 受影响的生计。更重要的是，网络特性随着时间的推移在灾难阶段发生了变化；此外，网络连接的进化变化发生在不同的地理环境中。和其他基本需求，包括疏散和搬出物品、提供庇护所以及清理受污染的房屋和公共场所，这些都有助于确保和恢复受洪水影响的生计。更重要的是，网络特性随着时间的推移在灾难阶段发生了变化；此外，网络连接的进化变化发生在不同的地理环境中。和其他基本需求，包括疏散和搬出物品、提供庇护所以及清理受污染的房屋和公共场所，这些都有助于确保和恢复受洪水影响的生计。更重要的是，网络特性随着时间的推移在灾难阶段发生了变化；此外，网络连接的进化变化发生在不同的地理环境中。