Abstract
Romania is one of the countries severely affected by numerous natural hazards, where landslides constitute a very common geomorphic hazard with strong economic and social impacts. The analyzed area, known as the “Ciuperca Hill”, is located in Oradea (NW part of Romania) and it has experienced a number of landsliding events in previous years, which have endangered anthropogenic systems. Our investigation, focused on the main causal factors, determined that landslide events have rather complex components, reflected in the joint climatological characteristics, properties of the geological substrate, and human activity that further contributed to the intensive change of landscape and acceleration of slope instability. Analysis of daily precipitation displays the occurrence and intensive distribution between May and September. Higher values of rainfall erosivity (observed for the 2014–2017 period), are occurring between April and August. Erosivity density follows this pattern and indicates high intensity events from April until October. SPI index reveals the greater presence of various wet classes during the investigated period. Geological substrate has been found to be highly susceptible to erosion and landsliding when climatological conditions are suitable. Accelerated urbanization and reduced vegetation cover intensified slope instability. The authors implemented adequate remote-sensing techniques in order to monitor and assess the temporal changes in landslide events at local level. Potential solutions for preventative actions are given in order to introduce and conduct qualitative mitigation strategies for shaping sustainable urban environments. Results from this study could have implications for mitigation strategies at national, regional, county, and municipality levels, providing knowledge for the enhancement of geohazard prevention and appropriate response plans.
Highlights
There are many factors that influence the occurrence of landslides besides the precipitation factor, the authors of this study focused on selected pluvial and drought parameters in order to fully describe the variability and occurrence of the main agent of wet mass movement events
Rehabilitation of the abandoned and under-used green area of Ciuperca Hill, a cultural symbol of Oradea city, was thoroughly addressed in this paper from the standpoint of sustainability and interplay between natural and anthropogenic processes that occurs in the given case study
The approach to solve problems associated with landslides is one of the most challenging, but it is the most suitable issue for a good implementation of spatial planning strategies along with valid land use
Summary
Europe is a network of a majority of highly populated urban areas [1] Cities have surpassed their traditional role as economic engines of regional growth; they currently strive to provide amenities such as cultural, educational or health services, all part of the modern urban lifestyle, which includes sustainability, well-being, and inclusive growth. In meeting their needs for food, energy, space and other resources, these densely urbanized areas are subject to significant pressures and challenges [2] like urban sprawl, scattered.
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