- Biogeography (19)
- Climatology (36)
- Environment (77)
- Geomorphology (58)
- GIS and Remote Sensing (19)
- Human and economic geography (63)
- Hydrology (57)
- Regional geography (45)
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- Various (37)
Abstract: The Land use/Land cover (LULC) has a substantial role in planning and monitoring natural resource utilization, in the framework of the ongoing surge in human demands in the current ecosystem. Satellite remote sensing provides modern methods for locating and mapping Land use/Land cover patterns and their spatial changes. This paper discusses the evaluation of the LULC classes characteristic of Keti Bunder during the years 2015 and 2020, by using satellite remote sensing; the paper also uses Geo-informatics to study and investigate the temporal LULC variations that occurred over time. According to the empirical findings, there have been significant spatial changes, with less dry mudflats and unoccupied land overall. In comparison, the findings of the research point to inter-conversion of the area between LULC classes, i.e. mangrove areas, turbid water, wet mudflat, dry mudflat and barren land/vacant land. Overall, these geographical alterations show that the environment has been significantly impacted due to recent extreme weather events in the region.
Abstract: In this article, we provide a review of research that explores the extensive history of wildfires across Europe, focusing specifically on Romania’s territory. Lakes and peatlands serve as ideal sources for reconstructing charcoal fluxes resulting from vegetation burning. These natural resources are extremely sensitive to local environmental changes, and the deposition of allochthonous material is exclusively atmospheric. The analysis of macro-charcoal is the primary method for reconstructing local and regional wildfires. This article aims to emphasize the significant studies on paleofires, and the processing and identification methods of macroscopic charcoal particles, which include charcoal number, morphology, and CharAnalysis. The review of scientific achievements in Europe and Romania provides valuable insights into these methods. We aim to investigate the potential of modern international paleofire databases, such as the Global Charcoal Database and Reading Palaeofire Database, which provide updated information on local and regional paleofire occurrences during the Holocene period. We will also make use of software tools that generate maps based on network data, such as VOSviewer Bibliometric Analysis, to visualize and study the wildfire in Romania. Furthermore, we will analyze the publications related to this topic that are available in the Web of Science database. We analyzed the results of paleofire studies in Europe and Romania to determine the primary research directions linked to fire reconstruction. Our review revealed that most of the study sites in Romania are in the Carpathians, particularly at higher elevations, followed by mid-elevation areas. However, lowlands have been less investigated up to this date.
Abstract: The current study focuses on the investigation of soil organic carbon in Technosols in Kula Municipality. It has several aims. There is a need of a provision of more data, regarding carbon sequestration rates in topsoils in plains that are formed in subhumid climatic conditions. Another aim is to check the comparability of the in-profile cultural layer with other ones that are built in different climatic conditions. Objects of the research are contemporary since buried soil horizons play a major part on the provision of essential ecosystem services. The characteristics of soil organic matter are determined by a chemical analysis of six soil samples in the laboratories of the Institute of Soil Science, Agrotechnologies and Plant Protection (ISSAPP) “N. Pushkarov”. The total carbon content is determined by the test of Turin and soil color is determined by Munsell Soil Color Charts (1975). Soil organic carbon values in topsoil vary from 670,000 tons/ha to 1,240,000 tons/ha. Organic carbon in the studied sites represents less than 1% of the soil sample. The study may be regarded as the first step in the assessment of Bulgarian Technosols and their role in the global carbon cycle.
Abstract: Coronavirus cases in India have been steadily increasing since March 2020. COronaVIrus Disease 2019 (COVID-19) has been managed by a variety of preventative measures. A prominent measure by the Government of India to prevent the spread of Coronavirus Disease 2019 (COVID-19) began on March 25, 2020, with a complete suspension of all outdoor activities throughout the country. Such complete lockdown has resulted in a decrease in anthropogenic emissions, which is partly due to restrictions on human activities. Delhi National Capital Region (NCR), a landlocked area, suffers from high amounts of aerosols due to both natural and anthropogenic sources. The present research focuses on changes in Aerosol Optical Depth (AOD) prior to and during lockdown (initial and second lockdown phases) around satellite cities (Faridabad, Ghaziabad, Gautam Budh Nagar and Gurugram) of Delhi using high-resolution MODIS AOD product. With the implementation of lockdown measures in phase I and phase III of the current study region, AOD decreased dramatically, while phase II and phase IV lockdown phases had a higher concentration of aerosol. An unexpected increase in AOD occurred during the second lockdown compared with the initial lockdown and before the lockdown. Overall, the average percentage change from 2019 to 2020 during first lockdown is -4.44%, while the average percentage change from 2020 to 2021 is 27.63%.
Abstract: The phenomenon of urban pollution is one of the most serious problems that affect people in the world, as it causes the spread of epidemics and diseases that threaten their health. As in the case of other societies, this also represents an important issue for Algeria. Therefore, through this work, we decided to take an example of urban pollution in an Algerian city of historical and administrative importance, represented by the city of El-Khroub located in the province of Constantine; the aim was to monitor the reality of urban waste management in the city center, the disinfection and disposal of urban solid waste. Through this, we monitored the most important ways that local authorities follow to eliminate solid waste, including landfill or incineration, where household waste annually reaches 2045328 tons. The dirt still floats in the city neighborhoods, because of the ignorance of the population, as well as the lack of authorities to ensure a clean and sustainable environment.
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