scholarly journals Monitoring of Land Degradation and Desertification in the South of Jabal Al Akhdar Mountain in North East Libya

2019 ◽  
Vol 2 (5) ◽  
Keyword(s):  
Land Degradation ◽  
Vegetation Cover ◽  
Natural Vegetation ◽  
Green Mountain ◽  
North East ◽  
The North ◽  
Al Jabal Al Akhdar ◽  
Remote Sensing Techniques ◽  
Land Degradation And Desertification ◽  
Libyan Desert

Over the last few decades, global warming and human activities have led to changes and deterioration in natural vegetation across the world. Land degradation in arid, semi-arid areas led to the emergence of desertification especially areas that are located along the desert margins. The Al Jabal Al Akhdar Mountains (The green Mountain) in the north east Libya is one of those areas that have experienced changes in vegetation cover. This region has environmental and economic importance in providing habitat for wildlife and services for local communities and cities in the Libyan Desert. This research will investigate natural vegetation dynamics in the Al Jabal Al Akhdar region using remote sensing techniques in an attempt to monitoring the desertification over the last 42 years to determine the factors that have caused this problem. The overall aim of this paper was to evaluate the factors which have affected vegetation cover change in the Al Jabal Al Akhdar region over the last 42 years.

scholarly journals The inventory of vegetation cover of small river valleys in the north-east of the Samara Region

2021 ◽  
Vol 10 (1) ◽  
pp. 157-162
Author(s):  
Vera Valentinovna Solovieva
Keyword(s):  
Plant Species ◽  
Vegetation Cover ◽  
Higher Plants ◽  
Small River ◽  
Wild Plants ◽  
Small Rivers ◽  
North East ◽  
The North ◽  
The Right ◽  
River Valleys

The study covered 10 small rivers in the North-Eastern part of the Samara Volga region. The author studied the vegetation cover, which is understood as a set of phytocoenoses and their constituent plant species. On the territory of Pokhvistnevsky District, there are two groups of river valleys that are heterogeneous in geobotanical terms. The first group includes the rivers with forested valleys (Kutlugush, Murakla, Karmalka). Their slopes are more or less symmetrical and steep. The vegetation cover of an undeveloped floodplain is usually uniform, and there is usually no belt. The valleys of the second group are treeless; their slopes are sharply asymmetrical (Amanak, Tergala, Talkish). The right-bank tributary of the Maly Kinel River the Lozovka River with its length of 20 km and the left tributary Kuvayka River with its length of 16 km were studied on the territory of Kinel-Cherkassky District. The Padovka and Zaprudka rivers and the right tributaries of the Bolshoi Kinel River (Kinelsky District) were also studied. The most common associations are (Salix fragilis heteroherbosa, Scirpus sylvaticus purum, Agrostis stolonifera Amoria repens, Elytrigia repens + Poa angustifolia heteroherbosa). In total, 19 types of phytocoenoses were noted, 4 of them are found in half of the studied rivers. In the plant communities of small river valleys there are 232 species of higher wild plants, which belong to 139 genera from 48 families. This is 60% of the total number of higher plants registered in the flora of small river valleys of the Samara Region. Rare protected plant species are registered here: Adonis volgensis Steven ex DC., Cacalia hastata L., Delphinium cuneatum Stev. ex DC., Globularia punctata Lapeyr.

scholarly journals Farming expansion and land degradation in Western Bahia, Brazil

2009 ◽  
Vol 9 (3) ◽  
pp. 61-76 ◽  
Author(s):  
Mateus Batistella ◽  
Gustavo Souza Valladares
Keyword(s):  
Land Use ◽  
Soil Erosion ◽  
Land Degradation ◽  
Land Use Planning ◽  
Water Conservation ◽  
Vegetation Cover ◽  
Temporal Dynamics ◽  
Natural Vegetation ◽  
Northeastern Brazil ◽  
Temporal And Spatial Distribution

Land degradation by soil erosion has called attention in tropical developing countries, particularly when natural vegetation is converted to farmland. Thus, the occupation of Brazilian savannas in Western Bahia is a matter of growing environmental concern. There are approximately 10 million hectares affected by this relatively recent land-use dynamics, but little is known about the temporal and spatial distribution of the process. To better understand such transformations, this paper addresses three related topics: land use/land cover (LULC) in 1985 and 2000; LULC dynamics between 1985 and 2000; and risk of land degradation by soil erosion as a function of farming expansion. The study area is located in Northeastern Brazil, between the coordinates 11º S and 46º 30' W and 14º S and 43º 30' W. All classes of natural vegetation cover decreased their areas during the period of study. Savanna (cerrado) lost 21.0% of its original area. Modern farming and irrigated areas increased 154.4 and 526.0%, respectively. Farming expansion reached 1,675,233 ha. Moderate risk of land degradation by soil erosion increased from 28.0 to 36.8% of the landscape mosaic between 1985 and 2000. The spatial and temporal dynamics observed reproduces development and land degradation examples of other savanna lands in Brazil. The integrity of native vegetation cover and the dissemination of soil and water conservation practices should be considered. This research contributes with an understanding of landscape transformations as a baseline for strategic environmental and land-use planning within the region.

scholarly journals The problem of the non-marine cretaceous strata correlation in the north-east of Russia: the conditions of florogenesis in the volcanic region

2019 ◽  
Vol 27 (6) ◽  
pp. 41-54
Author(s):  
S. V. Shczepetov ◽  
V. Yu. Neshataeva
Keyword(s):  
Vegetation Cover ◽  
Volcanic Material ◽  
North East ◽  
The North ◽  
Local Species ◽  
Fossil Floras ◽  
Systematic Composition ◽  
Long Term Preservation ◽  
Dynamics Of Vegetation

The most part of the fossil floras from the Cretaceous volcanogenic formations of the North-East of Russia differs significantly in systematic composition from the same-age paleofloras of coastal lowlands. In order to explain the features of their formation, the modern data on the dynamics of vegetation cover on the volcanic plateaus of Central Kamchatka were used. It was shown that in the sites where the paleofloras in geological disposals of the Okhotsk-Chukchi volcanogenic belt were found, there was practically no erosion, but there was the abundance of volcanic material suitable for the formation of disposals. After the massive powerful eruptions, the inland districts of the vast volcanic areas were isolated from the sources of diasporas. Vegetation cover in these areas recovered mainly due to the pool of local species, i.e., maintained as a diasporic sub-climax. The lack of competition from angiosperms contributed to the long-term preservation in such paleofloras the ancient groups of plants and the formation of new taxa on their basis.

scholarly journals Assessing soil loss using GIS based RUSLE methodology. Case of the Bou Namoussa watershed – North-East of Algeria

2018 ◽  
Vol 36 (1) ◽  
pp. 27-35 ◽  
Author(s):  
Chemss Eddine Bouhadeb ◽  
Mohamed Redha Menani ◽  
Hamza Bouguerra ◽  
Oussama Derdous
Keyword(s):  
Vegetation Cover ◽  
Soil Loss ◽  
Erosion Rate ◽  
Geographical Information ◽  
Rainfall Erosivity ◽  
Natural Environments ◽  
North East ◽  
The North ◽  
Soil Erosion Rate ◽  
Very High

AbstractThis study aims to estimating annual soil erosion rate and its spatial distribution in the Bou Namoussa water-shed located in the North-East of Algeria by applying the revised universal soil loss equation (RUSLE) within a Geographical Information System environment (GIS). The application of the RUSLE model in different natural environments and on every scale takes into account five key factors namely: the rainfall erosivity, the soil erodibility, the steepness and length of slopes, the vegetation cover and the conservation support practices. Each of these factors was generated in GIS as a raster layer, their combination, resulted in the development of a soil loss map indicating an average erosion rate of 7.8 t·ha−1·y−1. The obtained soil loss map was classified into four erosion severity classes; low, moderate, high and very high severity representing respectively 40, 30.48, 22.59 and 6.89% of the total surface. The areas, showing moderate, high and very high erosion rates which represent more than half of the basin area were found generally located in regions having high erodibility soils, steep slopes and low vegetation cover. These areas should be considered as priorities in future erosion control programs in order to decrease the siltation rate in the Cheffia reservoir.

scholarly journals Mapeamento da Cobertura Vegetal e dos Níveis de Degradação das Terras do Município de Parari-PB (Mapping of Vegetation Cover and Levels of Land Degradation in the City of Parari-PB)

2013 ◽  
Vol 5 (5) ◽  
pp. 1203
Author(s):  
Ruy Souza de Santana ◽  
Marx Prestes Barbosa ◽  
Paulo Roberto Megma Francisco ◽  
Francisco de Assis Da Siveira Gonzaga
Keyword(s):  
Remote Sensing ◽  
Information System ◽  
Geographic Information System ◽  
Land Degradation ◽  
Vegetation Cover ◽  
Climate Indices ◽  
Digital Maps ◽  
Low Level ◽  
Remote Sensing Techniques ◽  
The City

Este trabalho teve como objetivo realizar uma avaliação do processo da desertificação no município de Parari, através do estudo dos níveis de degradação das terras utilizando técnicas do sensoriamento remoto e sistema de informação geográfica. Na metodologia de trabalho de campo registrou-se o panorama atual dos níveis de degradação das terras pelo método de etapas lógicas e sistemáticas. Utilizou-se do programa SPRING e como resultados foram gerados os mapas digitais dos níveis de degradação das terras e da distribuição da cobertura vegetal. Foi constatado que o nível de degradação muito baixo identificado ocupa 9,28 km2, o nível de degradação baixo ocupa uma área de 7,73 km2, degradação moderado com 43,26 km2, o nível de degradação grave ocupa uma área de 63,98 km2 e o nível de degradação muito grave ocupa o menor percentual, 3,84% para 4,91 km2 do território.Palavras-chave: Sensoriamento Remoto, Desertificação, Semiárido. Mapping of Vegetation Cover and Levels of Land Degradation in the City of Parari-PB ABSTRACTThis study aims at evaluating the process of desertification in the city of Parari, by studying the levels of land degradation using remote sensing techniques and geographic information system. In the methodology of fieldwork there was the picture of current levels of land degradation by the method of logical and systematic steps. We used the SPRING program and how results were generated digital maps of the levels of land degradation and distribution of vegetation cover. It was found that the very low level of degradation identified occupies 9.28 km2, the low level of degradation occupies an area of 7.73 km2, 43.26 km2 with moderate degradation, the level of serious deterioration occupies an area of 63, 98 km2 and the level of degradation very serious occupies the lowest percentage, 3.84% to 4.91 km2 of the territory.Keywords: Climate Indices, dry and wet periods, Climate Variability.

Ras al Khaimah: further archaeological discoveries

Antiquity ◽  
1976 ◽  
Vol 50 (200) ◽  
pp. 216-222
Author(s):  
Beatrice De Cardi
Keyword(s):  
United Arab Emirates ◽  
The State ◽  
Focused Attention ◽  
North East ◽  
The North ◽  
History Of ◽  
The City

Ras a1 Khaimah is the most northerly of the seven states comprising the United Arab Emirates and its Ruler, H. H. Sheikh Saqr bin Mohammad al-Qasimi, is keenly interested in the history of the state and its people. Survey carried out there jointly with Dr D. B. Doe in 1968 had focused attention on the site of JuIfar which lies just north of the present town of Ras a1 Khaimah (de Cardi, 1971, 230-2). Julfar was in existence in Abbasid times and its importance as an entrep6t during the sixteenth and seventeenth centuries-the Portuguese Period-is reflected by the quantity and variety of imported wares to be found among the ruins of the city. Most of the sites discovered during the survey dated from that period but a group of cairns near Ghalilah and some long gabled graves in the Shimal area to the north-east of the date-groves behind Ras a1 Khaimah (map, FIG. I) clearly represented a more distant past.

Lichens in the North-East regions of Cyprus

1999 ◽  
Vol 110 (5-6) ◽  
pp. 455-463 ◽  
Author(s):  
S. Güvenç ◽  
Ş Öztürk
Keyword(s):  
North East ◽  
The North

TBE in Italy

2019 ◽  
Author(s):  
Valentina Tagliapietra ◽  
Flavia Riccardo ◽  
Giovanni Rezza
Keyword(s):  
Case Series ◽  
East Part ◽  
Mountainous Regions ◽  
North East ◽  
The North ◽  
Tick Borne Encephalitis ◽  
Low Incidence

Italy is considered a low incidence country for tick-borne encephalitis (TBE) in Europe. Areas at higher risk for TBE in Italy are geographically clustered in the forested and mountainous regions and provinces in the north east part of the country, as suggested by TBE case series published over the last decade.

Sign in / Sign up

Export Citation Format

Share Document