Local social networks are vital contributor to community resilience and recovery from disasters. We aim to assess how collaboration among local formal actors varies during different phases of disaster. We also identify the gaps in local institutional collaboration between policy and practice. The social network analysis is used to measure the network structure for coastal disaster management at the bottom level administrative (i.e., Union) in Bangladesh. We consider three disaster-prone locations in the southwest part of coastal Bangladesh. The following network matrices are used to quantify ties among the actors of the local disaster management committee: degree, betweenness, and eigenvector. The results reveal that the local committee members are highly active during the preparedness and the response phase. The network structure varies among studied locations due to multiple factors such as diverse leadership capacities of the actors, road network, and physical characteristics of the areas. Although Bangladesh is internationally acknowledged for disaster management activities, we find very poor collaboration among actors during the recovery and mitigation phase. The collaboration and coordination need to be enhanced during the recovery and mitigation phases for sustainable disaster management. The actual implementation of the disaster management policies is far behind what the policy documents indicate. Proper implementation of the roles and responsivities specified in the policy documents is therefore needed.

当地社交网络是社区复原力和灾后恢复的重要贡献者。我们旨在评估当地正式参与者之间的合作在灾害的不同阶段如何变化。我们还确定了政策和实践之间地方机构合作的差距。社会网络分析用于衡量孟加拉国底层行政（即联盟）沿海灾害管理的网络结构。我们考虑了孟加拉国沿海西南部的三个灾害多发地点。以下网络矩阵用于量化当地灾害管理委员会参与者之间的联系：程度、介数和特征向量。结果表明，地方委员会成员在准备和响应阶段非常活跃。由于参与者的不同领导能力、道路网络和区域的物理特征等多种因素，网络结构因研究地点而异。尽管孟加拉国的灾害管理活动在国际上享有盛誉，但我们发现，在恢复和减灾阶段，参与者之间的合作非常差。在可持续灾害管理的恢复和减灾阶段需要加强协作和协调。灾害管理政策的实际实施远远落后于政策文件所表明的。因此，需要正确实施政策文件中规定的角色和职责。和区域的物理特征。尽管孟加拉国的灾害管理活动在国际上享有盛誉，但我们发现，在恢复和减灾阶段，参与者之间的合作非常差。在可持续灾害管理的恢复和减灾阶段需要加强协作和协调。灾害管理政策的实际实施远远落后于政策文件所表明的。因此，需要正确实施政策文件中规定的角色和职责。和区域的物理特征。尽管孟加拉国的灾害管理活动在国际上享有盛誉，但我们发现，在恢复和减灾阶段，参与者之间的合作非常差。在可持续灾害管理的恢复和减灾阶段需要加强协作和协调。灾害管理政策的实际实施远远落后于政策文件所表明的。因此，需要正确实施政策文件中规定的角色和职责。在可持续灾害管理的恢复和减灾阶段需要加强协作和协调。灾害管理政策的实际实施远远落后于政策文件所表明的。因此，需要正确实施政策文件中规定的角色和职责。在可持续灾害管理的恢复和减灾阶段需要加强协作和协调。灾害管理政策的实际实施远远落后于政策文件所表明的。因此，需要正确实施政策文件中规定的角色和职责。