Specifying the Vegetation Cover Changes in Komel River River Using Remote Sensing Techniques

2021 ◽  
Vol 21 (2) ◽  
pp. 17-26
Author(s):  
Mahmoud Hamrawi ◽  
Ibrahim Ibrahim
Keyword(s):  
Remote Sensing ◽  
Vegetation Cover ◽  
Remote Sensing Techniques

scholarly journals MONITORING DESERTIFICATION IN SOME REGIONS OF IRAQ USING GIS TECHNIQUES

2021 ◽  
Vol 52 (3) ◽  
pp. 620-625
Author(s):  
Y. K. Al-Timimi
Keyword(s):  
Remote Sensing ◽  
Environmental Economic ◽  
Vegetation Cover ◽  
Vegetation Index ◽  
Normalized Difference Vegetation Index ◽  
Marked Decrease ◽  
Social Systems ◽  
Sand Dunes ◽  
Rate Of Increase ◽  
Remote Sensing Techniques

Desertification is one of the phenomena that threatening the environmental, economic, and social systems. This study aims to evaluate and monitor desertification in the central parts of Iraq between the Tigris and Euphrates rivers through the use of remote sensing techniques and geographic information systems. The Normalized difference vegetation index NDVI and the crust index CI were used, which were applied to two of the Landsat ETM + and OLI satellite imagery during the years 1990 and 2019. The research results showed that the total area of ​​the vegetation cover was 2620 km2 in 1990, while there was a marked decrease in the area Vegetation cover 764 km2 in 2019, accounting for 34.8% (medium desertification) and 10.2% (high desertification), respectively. Also, the results showed that sand dunes occupied an area of ​​767 km2 in 1990, while the area of ​​sand dunes increased to 1723 km2 in 2019, with a rate of 10.2%) medium desertification (and 22.9% (severe desertification), respectively. It was noted that the overall rate of decrease in vegetation cover was 21.33 km2year-1 while the overall rate of increase in ground erosion in the area is 10.99 km2year-1.

scholarly journals RELATIONSHIP OF SPECTRAL REFLECTANCE AND NDVI TO SOME SOIL PROPERTIES OF BRICKS FACTORIES SOILS IN NAHRAWAN AREA,BAGHDAD IRAQ

2019 ◽  
Vol 50 (3) ◽  
Author(s):  
R. K. Abdullatiff
Keyword(s):  
Remote Sensing ◽  
Vegetation Cover ◽  
Vegetation Index ◽  
Remote Sensing Data ◽  
Spectral Reflectivity ◽  
Tigris River ◽  
The Difference ◽  
Remote Sensing Techniques ◽  
The One ◽  
Relationship Of

A study was conducted to investigate the effect of the brick industry on the environmental system of these project soils of the brick factories in Alnahrawan district. Remote sensing techniques was used to study the relationship between the spectral reflectivity and the vegetative index on the one hand and some surface soil characters of the project and to determine the variation in vegetation cover for the same area and for two different periods.Ten sites were selected to study spectral reflectivity under similar geomorphological conditions near the brickworks project in the Anahrawan district with an area of 10,000 hectares. Soil samples were taken from the surface and at a depth of 0-30 cm. Some chemical and physical characters of research soil were analyzed in the soil department laboratories, college of Agriculture, Baghdad University.Several satellite images taken from the satellite Land sat (ETM) 2013 and another from same satellite in 1990 T.M to determining the change between the two periods. After obtaining remote sensing data (reflectivity and vegetation index).the correlation analysis was carried out between these data. It was observed that the soil salinity values were decreased due to the drainage that the area was confined between the Tigris River and the Diyala tributary which leads to good natural drainage.The attached tables indicate that thedigital numbers of the soil sampling sites in 2013 are highly significant correlated, While some of the characters did not show the use of this region industrially. After calculating the difference between the two images to determine the change. A 100% change was observed and the vegetation cover was sharply reduced between the two images. as well as the extension of the land of empty land, although these lands are still suitable for agriculture.

scholarly journals Degradação Ambiental na Microrregião do Carirí Paraibano (Environmental Degradation in the Micro Region of Cariri Paraibano)

2013 ◽  
Vol 6 (4) ◽  
pp. 823
Author(s):  
Glauciene Justino Ferreira da Silva ◽  
Nadjacleia Vilar Almeida ◽  
Lidiane Cristina Félix Gomes ◽  
Otávia Karla Apolinário dos Santos
Keyword(s):  
Remote Sensing ◽  
Environmental Degradation ◽  
Vegetation Cover ◽  
Vegetation Index ◽  
Normalized Difference Vegetation Index ◽  
Spectral Response ◽  
Semiarid Region ◽  
Savanna Vegetation ◽  
Remote Sensing Techniques ◽  
Cover Class

O desmatamento de grandes áreas de vegetação de caatinga para dar lugar às lavouras e servir de pasto aos rebanhos tem contribuído para a degradação ambiental na região Semiárida. Os poucos remanescentes do Bioma Caatinga no Semiárido nordestino sofrem com a pressão exercida pelo avanço agropecuário e pelo descaso de órgãos ambientais de fiscalização. Na microrregião do Cariri paraibano muitos municípios tem perdido a cobertura vegetal em virtude da necessidade de terras para cultivo. Diante do exposto, fica clara a necessidade de estudos sobre a degradação ambiental, para isso o uso das geotecnologias tem proporcionado o monitoramento das alterações provocadas sem manejo adequado dos recursos naturais. O Sensoriamento Remoto e as imagens de sensores orbitais têm sido amplamente empregados em estudos ambientais, possibilitando a extração de informações. Desta forma, este trabalho objetivou avaliar a dinâmica da ocupação do solo e a cobertura vegetal no município de Pararí-PB entre os anos de 1988 e 2005, por meio de técnicas de Sensoriamento Remoto e análise espacial, além de contribuir com o estudo da degradação ambiental no Semiárido. Os resultados obtidos com os mapas de cobertura do solo evidenciaram que a classe solo exposto ocupou as áreas anteriormente pertencentes à classe vegetação densa e rala, expondo o solo do município aos efeitos das chuvas intensas e irregulares. O Índice de Vegetação da Diferença Normalizada (NDVI) melhor representou o estado da cobertura vegetal existente nos anos estudados, e a resposta espectral do solo e vegetação foram influenciados pela precipitação na época em que as imagens foram obtidas. A B S T R A C T The deforestation of large areas of savanna vegetation to make way for crops and serve as pasture to flocks has contributed to environmental degradation in the semiarid region. The few remaining Caatinga Biome in the northeastern Caatinga semiarid suffer from the pressure exerted by agricultural advances and the neglect of environmental enforcement agencies. In micro Cariri many municipalities have lost vegetation cover due to the need for land for cultivation. Given the above, it is clear the need for studies on environmental degradation. In that purpose, the use of geotechnology has provided monitoring changes caused without proper management of natural resources. The Remote Sensing and images from satellite sensors have been widely used in environmental studies, enabling the extraction of information. Thus, this study aimed to evaluate the dynamics of land use and vegetation cover in the municipality of Pararí-PB between the years 1988 and 2005, using remote sensing techniques and spatial analysis, and contributing to the study of environmental degradation in the semiarid. The results obtained with the maps of land cover class showed exposed soil areas previously occupied belonging to the class sparse and dense vegetation, exposing the municipality to the effects of heavy rains. The normalized difference vegetation index (NDVI) best represented the state of vegetation existing in the years studied, and the spectral response of soil and vegetation were influenced by precipitation at the time the pictures were taken. Key-words: Semiarid, vegetation cover, Remote Sensing.

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.

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