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It is observed that the COVID-19 Pandemic mostly restricts people's movement and walking habits. In this direction, this study aims to highlight how the walking behaviors of individuals affected in different geographies' neighborhoods before and during the Pandemic.

This paper focuses on the relationship between neighborhood characteristics and the changing walking behavior of 24 sample regions (514 participants) with the highest incidents of COVID-19 infection from American, European, Asian, Western Pacific, African and Middle Eastern cities. The paper's methodology is supported by an /online questionnaire survey conducted in these 24 disparate neighborhoods in December 2020.

Findings show that “walkable access” varies over geographies during the Pandemic. Urban amenities within 15–20 min of access become more important than ever. The results unravel that either walkable or non-walkable neighborhoods showcased similarities despite that urban amenities were not within 15–20 min of access. Three prominent aspects should be emphasized to plan walkable neighborhoods: providing walkable access, forming spatial proximity and sustaining social cohesion.

The availability of daily amenities, such as shopping stores, health care, education services and pharmacies within a 15–20-min walking distance maintain everyday life and increase social interactions. In addition, places with walkable access encourage an active lifestyle and contribute the public health. The impact of the COVID-19 Pandemic movement restrictions on the walking behavior of individuals highlights how the qualities of distance-based urban planning need to be supported with time-based practical attributes that can shape neighborhood planning frameworks.

This paper highlights the coexistence of “walkability” and “accessibility” measures in urban practice and research to create resilient and sustainable neighborhoods. The “walkable access” term used in the paper addresses joint measures of walkability and accessibility.

Tehran’s health-care system is growing, yet it lacks emergency planning procedures. The premise of this study is that the urban environment around a hospital is just as robust as the hospital itself. This study aims to look at hospital resilience in an urban setting to see where it may be improved to keep the hospital operational during a disaster.

The urban resilience (UR) of Amir-Alam Hospital was analyzed in this study using a customized version of the United Nations Office for Disaster Risk Reduction’s City Resilience Profiling Tool. The 34 indications were broken down into five categories.

The result revealed that the hospital’s UR score was 51.75 out of 100, indicating medium resilience. The results of this study enable the decision-makers to determine what measures they may take to improve the hospital’s resilience in terms of its surrounding urban context.

The originality of this research is based on the surrounding urban environment’s resilience as an integral part of hospital resilience.

Having easy access to the flu and COVID-19 vaccination sites may be important for controlling the spread of the infection. Chicago implemented a broad strategy of opening COVID-19 vaccination locations across the city in a variety of locations.

We defined access as having vaccinations within one mile. Data came from the American Community Survey (ACS), Centers for Disease Control and Prevention (CDC), Social Vulnerability Index (SVI), Illinois Department of Public Health (IDPH) and the Chicago Data Portal. We calculated the street-network distance from the population-weighted centroid of census tracts to the nearest vaccination sites before, during and post COVID-19 pandemic. We compared the demographics of census tracts within one mile to those greater than one mile during each period.

People age 65 and above and with disabilities saw significant decreases in flu vaccination site access to locations within one mile of their census tract in 2020–2021 compared to 2018–2019. The COVID-19 vaccination sites mimic these flu vaccination site patterns, suggesting a severe lack of geographic access for a group likely to experience limited mobility. Results combining instances of both flu and COVID-19 vaccination sites suggest that making COVID-19 vaccination sites available at flu shot site locations would significantly reduce the number of people with limited mobility lacking geographic access.

Policymakers should explore how this expanded network of vaccination locations could facilitate permanent improvements to access to vaccination sites for people with disabilities.

To reduce financial and human losses, managing risks associated with earthquakes is essential in practice. However, in using common risk management methods, experts are often faced with ambiguities that can create profound challenges for risk management. Therefore, it is necessary to develop a logical and straightforward risk assessment model to provide scientific and accurate answers to complex problems. This study aims to recommend an innovative combined method based on the probability-impact (P-I) approach and intuitionistic fuzzy set theory to identify and prioritize the essential earthquake risks associated with worn-out urban fabrics in the context of Iran.

The opinions of 15 experts in the fields of civil engineering and urban construction were gathered during brainstorming sessions. These brainstorming sessions were conducted to determine the probability of risks and the effect of identified risks. After calculating the severity of risks using the P-I approach and converting them to intuitionistic fuzzy sets, the risks were measured and prioritized based on their individual scores.

The study results indicated that risk of damage due to buildings’ age and flooding risk had the highest and lowest priorities in causes of financial damage, respectively. Furthermore, the risk of damage due to building quality (demolition) and building age was the most important. The risk of flooding and damage to communication networks has the lowest importance among causes of fatalities in worn-out urban fabrics.

The study findings and recommendations can be served as a policy and consultative instrument for the relevant stakeholders in the area of urban management.

The elevated level of nitrate in groundwater is a serious problem in Texas aquifers. To control and manage groundwater quality, the characterization of groundwater contamination and identification of the factors affecting the nitrate concentration of groundwater are significant. The purpose of this paper is to determine factors which have significant impacts on the elevated groundwater nitrate concentrations of the Southern High-Plains and the Edwards-Trinity aquifers.

The characterization of groundwater nitrate contamination was undertaken by analyzing the hydrochemical data of groundwater within a statistical framework. The multivariate statistical analysis (ordinary least square) and geographically weighted regression (GWR) models were used to study the relationship between groundwater nitrate contamination and land use of the study areas.

Results show groundwater nitrate contamination is typically due to an overapplication of N fertilizers to cotton in the Southern High-Plains aquifer and to grassland in the Edwards-Trinity aquifer. Adjusted R² (0.45) explains variations of nitrate concentration by well-depth, cotton production, shrubland and grassland in the Edwards-Trinity aquifer. The results of an analysis of variations in N concentration with well depth for all 192 wells indicate that nitrate concentrations in water from wells in the Southern High-Plains and Edwards-Trinity aquifers tend to decrease with increasing well-depth.

In this study, the GWR model was built to identify nitrate concentration within a geographic framework to ensure sustainable use of groundwater, which is important for local management purposes. The analysis should include local spatial variations of elements such as hydrologic characteristics and the land use activities if groundwater nitrate contamination causes adverse effects on human and ecosystem health.