Predicting and Improving the Waterlogging Resilience of Urban Communities in China—A Case Study of Nanjing

Abstract

In recent years, urban communities in China have been continuously affected by extreme weather and emergencies, among which the rainstorm and waterlogging disasters pose a great threat to infrastructure and personnel safety. Chinese governments issue a series of waterlogging prevention and control policies, but the waterlogging prevention and mitigation of urban communities still needs to be optimized. The concept of “resilience” has unique advantages in the field of community disaster management, and building resilient communities can effectively make up for the limitations of the traditional top-down disaster management. Therefore, this paper focuses on the pre-disaster prevention and control of waterlogging in urban communities of China, following the idea of “concept analysis–influencing factor identification–evaluation indicators selection–impact mechanism analysis–resilience simulation prediction–empirical research–disaster adaptation strategy formulation”. The structural equation model and BP neural network are used by investigating the existing anti-waterlogging capitals of the target community to predict the future waterlogging resilience. Based on this simulation prediction model, and combined with the incentive and restraint mechanisms, suggestions on corrective measures can be put forward before the occurrence of waterlogging.

Classification and Planning Strategies of Multidimensional Resilience Units for Urban Waterlogging: A Case Study of the Old City District in Shijiazhuang, China

“…As shown in Figure 7b, regarding redundancy, the northern and central areas show more vulnerability (units 19,20,21,22), mainly due to the high density of buildings and roads, which leaves little public space available for water infiltration. On the other hand, other areas, such as units 5, 11, 8, 10, 7, and 13, display higher to moderate levels of recoverability.…”

“…Zhang J et al studied three communities suffering from waterlogging problems in Jingdezhen City, China, using a community-scale flood resistance assessment method [19]. Cui, P et al identified indicators of community-level flood resilience involving social, natural, and economic aspects in Nanjing [20]. Conversely, other scholars have focused on urban resilience studies at various scales, including community, metropolitan, urban agglomeration, and regional levels [21].…”

Determinants of the Severity of Contract Enforcement in Chinese PPP Projects: From Public Sector’s Perspective

“…In fact, different research situations can have a significant impact on the research results [32]. PPP projects are characterized by heavy investment, long project cycle, strong asset specificity, and high lock-in degree [33][34][35]. In addition, although the concession contract of the PPP project is signed between the public and private sectors, the PPP project can have an immediate effect on the public interest, which in turn can influence the decision-making of the public sector [36].…”

Spatial–Temporal Variations of Water Quality in Urban Rivers after Small Sluices Construction: A Case in Typical Regions of the Taihu Lake Basin

“…Wuxi has now built more than 1200 large and small sluices because of rapid industrialization and urbanization. In 2020, Jiangsu Province invested about 5.9 billion dollars focusing on the implementation of flood control projects in the Taihu Lake Basin, which has greatly improved the flood control capacity of Taihu Lake [23]. The construction and operation of these new sluices and dams, as well as the regulation of existing ones, will have a direct impact on the water quality of Wuxi's rivers and Taihu Lake.…”

“…According to the 2020 statistics of the World Commission on Dams (WCD), the number of dams worldwide has reached 59,071, of which the number in China reached 23,841, accounting for about 40% of the world [9]. Urban rivers play a significant role in water extraction, navigation, and stormwater drainage, and also in urban domestic sewage as well as part of the industrial wastewater discharge.…”