scholarly journals The study of the modern ecological state of shelterbelts using GIS and remote sensing data

2020 ◽  
Vol 26 (2) ◽  
pp. 54-65
Author(s):  
Anastasiya Narozhnyaya ◽  
Yurii Chendev
Keyword(s):  
Arable Land ◽  
Remote Sensing Data ◽  
Climatic Conditions ◽  
Belgorod Oblast ◽  
Visual Interpretation ◽  
Space Images ◽  
Hydrothermal Coefficient ◽  
Gis And Remote Sensing ◽  
The 1950S ◽  
Interpretation Of Satellite Images

Digitization of maps of land-use (scale 1 : 10 000) 1955–1956, 1980–1981s years of surveying, visual interpretation of satellite images of the modern period of high resolution (2017), as well as extrapolation of these data, allowed us to establish that on the territory of the Belgorod oblast the length of shelterbelts from the 1950s to 2017 increased 2 times — from 14 600 km to 29 600 km. At the same time, in comparison with the 1950s, in the 1980s, the length of anti-erosion shelterbelts increased more than 3 times and the length of protective shelterbelts decreased by 9 %. On average, on the territory of the Belgorod region, about 0.96 km per 1000 km of shelterbelts before 1955, annually retires from circulation. The rate of loss of shelterbelts in the period 1950–1980s — 0.23 km/year×1000 km. About 0.13 km/year×1000 km of shelterbelts loses the integrity of the stand and shelterbelts become fragmented. The reasons for the reduction of shelterbelts is their aging, lack of systematic care, destruction with an increase in the area of settlements. Visual interpretation of space images allowed identifying the disturbed sites of shelterbelts in which the rarefaction (fragmentation) of forest stand is marked. 693 800 ha of arable land of the region belongs to slopes over 2°. On them in the 1950–1980s the 10 300 km of protective shelterbelts were created, out of which about 50 % deviate from the horizontal direction by more than 30°, which leads to soil erosion and the formation of scours, and then — gullies. Only 8.7 % of the contour shelterbelts on arable land from the total length of protective shelterbelts were determined. According to additional calculations, for 35 % of protective shelterbelts located relative to the horizontal lines correctly, the potential amount of soil flushing exceeds the permissible values by an average of 41 %, i.e. it is necessary to create additional shelterbelts higher up the slope on arable land. The inverse relationship between the length of disturbed and abandoned shelterbelts and the values of the hydrothermal coefficient (НTC) (r = -0.44) is revealed: in more arid climatic conditions of the Belgorod oblast the viability of shelterbelts decreases. On southern slopes above 4° reduction of length of shelterbelts at change of НTC occurs faster, than on slopes of other aspect.

scholarly journals Remote monitoring of land in western Kazakhstan

2015 ◽  
Vol 5 (1) ◽  
pp. 25-34
Author(s):  
Есмагулова ◽  
Bayan Esmagulova ◽  
Кошелева ◽  
Olga Kosheleva ◽  
Мушаева ◽  
...  
Keyword(s):  
Large Scale ◽  
Agricultural Land ◽  
Arable Land ◽  
Ecological Status ◽  
Remote Sensing Data ◽  
Ecological Crisis ◽  
Current Crisis ◽  
Space Images ◽  
High Resolution Satellite Images ◽  
Sand Control

The article presents the results of the environmental assessment of land in Western Ka-zakhstan, held by decoding high resolution satellite images. The object of investigation is Bokey Orda District of West Kazakhstan region. Decryption is performed by space images QuickBird 2013 1:50 000. Application of space images helped to define the boundaries of the main categories of agricultural land (arable land, grassland, sandy tracts, etc.), set the location of settlements, trans-port infrastructure, as well as to identify the main elements of the hydrographic network (rivers, lakes, estuaries, sors) and mesorelief (sandy hillocks, hill reduction, etc.). It was found that 48.4 % of the Bokey Orda District territory is occupied by agricultural land, 40.7 % - sandy massifs, 10.8 % of the land area are various negative mesorelief – saline depression, estuaries, bitter-salty lakes. The data on land grounds allowed assessing the ecological status of the territory at a rate of anthropo-genic stress that for lands of Bokey Orda District is 3.3 points, which corresponds to the ecological crisis. The current crisis situation is caused by overgrazing and plowing of virgin lands and is cha-racterized by strong decrease in productivity and loss of stability. Selective economic use and plan-ning of deep land improvement is suggeted. An acute need to implement large-scale sand-control works, restoration of degraded pastures and unproductive lands transfer in adaptive forest agricul-tural landscapes is established. The data on volumes of forest reclamation works to secure the shift-ing sands, held in Bokey Orda District in the period from 2011 to 2013, are presented. It is recom-mended to organize of environmental monitoring using remote sensing data, which will allow timely identification of areas, subjected to degradation processes, and to take appropriate measures to eliminate pockets of desertification in the initial stage.

scholarly journals Exploring the Relationship between LST, LULC and NDVI in Saïss Plain using Geospatial Techniques

2021 ◽  
Vol 314 ◽  
pp. 04001
Author(s):  
Manal El Garouani ◽  
Mhamed Amyay ◽  
Abderrahim Lahrach ◽  
Hassane Jarar Oulidi
Keyword(s):  
Remote Sensing ◽  
Surface Temperature ◽  
Land Surface Temperature ◽  
Land Surface ◽  
Vegetation Index ◽  
Arable Land ◽  
Remote Sensing Data ◽  
Landsat Images ◽  
Gis And Remote Sensing ◽  
Sensing Data

Land use/land cover (LULC) change has been confirmed that have a significant impact on climate through various pathways that modulate land surface temperature (LST) and precipitation. However, there are no studies illustrated this link in the Saïss plain using remote sensing data. Thus, the aim of this study is to monitor the LST relationship between LULC and vegetation index change in the Saïss plain using GIS and Remote Sensing Data. We used 18 Landsat images to study the annual and interannual variation of LST with LULC (1988, 1999, 2009 and 2019). To highlight the effect of biomass on LST distribution, the Normalized Difference Vegetation Index (NDVI) was calculated, which is a very good indicator of biomass. The mapping results showed an increase in the arboriculture and urbanized areas to detriment of arable lands and rangelands. Based on statistical analyzes, the LST varies during the phases of plant growth in all seasons and that it is diversified due to the positional influence of LULC type. The variation of land surface temperature with NDVI shows a negative correlation. This explains the increase in the surface temperature in rangelands and arable land while it decreases in irrigated crops and arboriculture.

scholarly journals Drought and vegetation analysis in Tarsus River Basin (Southern Turkey) using GIS and Remote Sensing data

2015 ◽  
Vol 12 (2) ◽  
pp. 1853 ◽  
Author(s):  
Celalettin Duran
Keyword(s):  
River Basin ◽  
Land Surface ◽  
Sand Dunes ◽  
Extreme Temperature ◽  
Morphological Structure ◽  
Remote Sensing Data ◽  
Climatic Conditions ◽  
Distribution Area ◽  
Plantation Forest ◽  
Gis And Remote Sensing

<p>In this study, the effects of topographic variables on drought and vegetation in dry season have been examined. Distributions of dry conditions in Tarsus River Basin were derived using the NDVI, NDMI indexes and LST (Land Surface Temperature) from landsat8 image bands.</p><p>There is large difference in elevation in the study area. Local climatic conditions are formed under the influence of altitude and morphological structure. Narrow and deep valleys in the topography create more moderate temperature/moisture conditions and are the main distribution area of tall forest vegetation. High radiation in the highest plateau system and, extreme temperature/moisture values led short-lived herbaceous vegetation to spread. Due to high insolation/temperature and restricted marine affect, establishment of scrub vegetation can be observed both in mid-elevation and south-sloping plateau of the study area. Anthropogenic agricultural fields form the land surface with the potential of high temperature/evapotranspiration rate in harvesting periods. Broadleaf plant species spread in areas close to the base of the valley stream. Plantation forest has been created in areas of near-shore sand dunes and very small delta (marsh).</p><p>Variability in topography also increases the width of the combination of factors that shape the vegetation. This also enables the number of taxa to increase and unusual taxa to co-exist.</p>

scholarly journals Assessment of the Ecological Condition of Soil Cover Based on Remote Sensing Data: Erosional Aspect

2021 ◽  
Vol 100 ◽  
pp. 05014
Author(s):  
Andrii Achasov ◽  
Alla Achasova ◽  
Ganna Titenko ◽  
Oleg Seliverstov ◽  
Vladimir Krivtsov
Keyword(s):  
Remote Sensing ◽  
Soil Cover ◽  
Arable Land ◽  
Satellite Image ◽  
Remote Sensing Data ◽  
Water Erosion ◽  
Visible Range ◽  
Visual Interpretation ◽  
Sensing Data ◽  
Automated Method

Soil erosion by water is the most important global environmental problem. A modern system for assessing and monitoring soil erosional degradation should be based on the use of remote sensing data. This raises the issue of correct data decoding. The article proposes a method for visual interpretation of eroded soils according to the Sentinel image obtained in the visible range. The authors give some combinations of decoding signs to determine the manifestations of linear and surface water erosion from images. The article shows possible errors in decoding the manifestations of water erosion and gives an example of assessing the erosion of the soil cover based on the results of decoding the Sentinel-2 satellite image. Moderately and heavily eroded soils are reliably distinguished, the area of which, according to the interpretation data, was 2.4% of the area of arable land in the studied territory. In the future, the obtained sample of spectral images of eroded soils can be used to develop an automated method of interpretation based on the principle of "computer vision".

Geosystems of Middle Siberia southern part: mapping methodology and results

2021 ◽  
Vol 970 (4) ◽  
pp. 35-44
Author(s):  
G.I. Lysanova ◽  
Ju.M. Semenov ◽  
A.A. Sorokovoi ◽  
I.V. Balyazin
Keyword(s):  
Landscape Structure ◽  
Remote Sensing Data ◽  
Landscape Patterns ◽  
Mountain Areas ◽  
Space Images ◽  
Earth Remote Sensing ◽  
Horizontal Structure ◽  
Composition And Structure ◽  
Geographical Regionalization ◽  
Middle Siberia

The сlassification of geosystem used in mapping is based on a system-hierarchic approach to detecting the co-involvement of landscape taxons. At the same time, we took into account the positioning of individual territories in the system of physical- geographical regionalization. The complexity of the landscape structure of the studied territory is due to its location at the junction of high- and lowland regions belonging to four physical-geographical areas. In the area under study, we identified and described more than 200 groups of fairies, which were then typed into classes of facies, geomes, and groups of geomes. Geoinformation mapping is performed using vector topographic basis and Earth remote sensing data. The decryption of synthesized space images was carried out manually and was based on field landscape surveys data. Digitization and indexing of landscape contours, creation, design and layout of the map were carried out in GIS MapInfo Professional. The cartographical analysis revealed regional differences in the complexity of landscape horizontal structures of high- and lowland regions, as well as the composition and structure of typological spectra of regional geosystems. Lowland geosystems mostly have a fairly uniform horizontal structure and large areas of landscape patterns. At the same time, mountain areas are characterized by considerable complexity and contrast of landscape structure.

Analiza modului de utilizare a terenurilor în Regiunea de Dezvoltare Nord a Republicii Moldova

2020 ◽  
Author(s):  
Iurie Bejan ◽  
Keyword(s):  
Land Use ◽  
Agricultural Land ◽  
Arable Land ◽  
Current Mode ◽  
Climatic Conditions ◽  
Development Region ◽  
Agro Forestry

The land use has undergone some changes in the last 30 years, by reducing the areas with arable land, converting multi-annual plantations into other categories of land, etc. According to the current mode of land use, the Northern Development Region has a pronounced agricultural profile - 80.3% of the total area represents agricultural land. The spatial differentiations regarding the morphological and agro-climatic conditions allowed the identification within the region of areas with agro-forestry and agro-pastoral specializations.

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