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Volume XIX |

The Buzău river alluvial fan – a groundwater modeling approach to sustainable exploitation

Abstract: Knowledge of groundwater resources is a key challenge for hydrogeologists, especially due to a continuous increase in demand for drinking water. This paper aims to investigate the consequences of overexploitation of the phreatic aquifer from the Buzău River alluvial fan and to assess alternatives operating programs related to achieving a sustainable groundwater exploitation. The study was achieved using data (groundwater level and general information from 97 hydrogeological boreholes) from the National Institute of Hydrology and Water Management, Romania, and collected in the field between July 18-19, 2017 (river stages for Buzău and Călmățui). The aquifer data was statistically analyzed and the obtained results allowed the design of a conceptual model for the hydrostructure and a mathematical model for the groundwater flow, using the FREEWAT software. Continuous exploitation of the phreatic aquifer through the catchment fronts that supply the city of Buzău (Crâng, Zahăr I, and Sud fronts) was simulated using the hydrodynamic model, in a transient regime. The maximum allowable flows were defined for each hydrogeological borehole that exploits the phreatic aquifer, using the mathematical model (values between 4.0 and 19.0 l/s). The exploitation of these flows was performed for 10 years, with time steps that allowed an analysis of the depression cone extension and drawdown value after 90 days, 180 days, one year, and five years of continuous pumping. After ten years, the resulting depression cone reached a diameter of 9.8 km and the groundwater level decreased with a maximum of 8.26 m, in a hydrogeological borehole. For stationary simulation (which is not influenced by the time parameter), it was observed that pumping with the maximum allowable flows resulted in a drawdown that exceeds one-third of the water column, which indicates overexploitation.

Volume XIX |

Sensitivity, Exposure, and Vulnerability to Climate Change of the Long-legged Buzzard (Buteo rufinus) in Europe

Abstract: Species response to climate change can be viewed in three main directions: range changes, phenological changes, and genetic selection of different traits to ensure adaptation to new conditions. Climate-niche factor analysis (CNFA) is a tool developed in order to assess species vulnerability to climate change. In order to test the usefulness of CNFA method, we have chosen the long-legged buzzard (Buteo rufinus) as a case study. This species breeds in south-east Europe, from the southern Balkans to north-western Mongolia and China, preferring open areas, arid steppes and semi-desert or mountains. According to CNFA model, long-legged-buzzard habitat receives less precipitation during the warmest period (PWQ), relative to European area, and exhibits less temperature variations during the year (TS). On the other hand, the presence of the long-legged-buzzard is associated with high values for mean diurnal range (MDR) and precipitation variations (PS). The greatest sensitivity of this species came from amount of precipitation during the warmest period (PWQ) and temperature and precipitation variations during the seasons (TS and PS). Long-legged-buzzard shows the most vulnerability in relation to precipitation of warmest period (PWQ), temperature seasonality (TS) and annual mean temperature (AMT).

Volume XIX |

Spatio-Temporal Analysis of the Disease Incidence in the population of Lviv region

Abstract: The paper focuses on the spatio-temporal analysis of the dynamics of the incidence in the population in Lviv region by the main classes of diseases for 2009-2018. Groups of factors influencing the incidence in the population and the demographic situation in general have been investigated. It was found out that each group of factors can have positive and negative effects in certain regions. The structure of the disease incidence in the population of Lviv region by classes of diseases for the period 2010-2018 has not changed. It is traditionally formed by diseases of the respiratory system, blood and blood-forming organs, circulatory system, endocrine system and neoplasms. The quantitative indicators of changes in the incidence in the population of the region until 2018 by the main classes of diseases in the context of administrative districts are calculated and analyzed. A cluster analysis was carried out to determine the spatial differentiation of the incidence in the population of Lviv region. For clustering, the main indicators were selected by classes of diseases that have the largest specific weight in the structure of morbidity. The cluster analysis made it possible to distinguish two clusters within the region, for which the characteristics in the population morbidity indicators were identified. The analysis of variance (LSD-test) showed the presence of significant differences between the incidences in the population in Lviv region on respiratory diseases. The study of the disease incidence in certain areas makes it possible to predict the state of health and to work out measures to improve the health in the population.

Volume XIX |

The Implications of the Sahel Security Crisis for the Development of Tourism Industry in Algeria

Abstract: The purpose of this paper is to illustrate how Algeria’s tourism industry has been hit by the political instability of the Sahel region countries in the 1999-2020 period, and how the Algerian decision-makers have responded to manage the subsequent adverse effects. The fundamental data used in this study were collected from a series of media reports, press releases and statistical sources in Algeria. Additionally, an important collection of secondary data from different sources was also used. The findings reveal that the Sahel security issues in Africa have had serious implications for the tourism industry in Algeria. The political instability of the neighbouring countries has made “security” the centrepiece of Algerian foreign policy. The study also shows that the Algerian security policy is based on a set of principles that are not changing over time, thus, it has not been flexible enough to respond to actual changes in the security situation. As a result, tourism has been locked in the country’s foreign policy, which unintentionally forces Algeria to abandon what could be one of the most powerful engines of economic growth.

Volume XIX |

Containment and mitigation strategies during the first wave of Covid-19 pandemic. A territorial approach in CCE countries

Abstract: The paper analysis the situation in CEE countries in terms of containment and mitigation strategies for the pandemic, but with a focus on the health systems and vulnerability factors (low scores for global health security index, understaffed health systems, higher shares of vulnerable people – obese persons, diabetic or those living in poor quality housing). As the new SARS-COV-2 spread throughout the world, Central and Eastern European governments rushed to preventive actions to reduce its spread, all the more considering that the first cases were imported from abroad (mainly from Italy). Public health measures carried out during the spring outbreak were effective, mainly due to the significant reduction in the contact rates and social distancing, which was partly voluntary, partly enforced. Thus, in early March, in person classes were suspended, persons returning from the areas with community spread of the virus were forced into quarantine, along with workplace closures, travel restrictions and shielding measures for individuals. In CEE countries, the lockdown, when enforced, preceded the curve of infections. There was little variation in the design and implementation of mitigation strategies, which were deployed very quickly, hence a much lower infection rate that did not pose additional strain on the health system.