Monitoring of forest cover dynamics in eastern area of Béni-Mellal Province using ASTER and Sentinel-2A multispectral data

Barakat, Ahmed; Khellouk, Rida; Jazouli, Aafaf El; Touhami, Fatima; Nadem, Samir

doi:10.1080/24749508.2018.1452478

Cited by 45 publications

(41 citation statements)

References 44 publications

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“…• Under the condition of sub-soiling, the wetting body formed by point source infiltration under drip irrigation is a semi ellipsoid. The larger the dripper discharge, the flatter the ellipsoid; with the increase of irrigation time, the wetting body is close to the hemisphere, and the distribution of salt and alkali is consistent with the distribution of wetting body [33]. irrigation duration, both horizontal and vertical salinity increased, while both horizontal and vertical salinity decreased with the increase of distance from emitter [34].…”

Section: Discussionsupporting

confidence: 53%

Saline-alkali migration in soda saline soil based on sub-soiling technology

Yuan¹,

Feng²,

Jang³

et al. 2019

Desalination and Water Treatment

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To study the saline-alkali migration law of soda saline-alkali soils based on sub-soiling technology, improve the soil quality of soda saline-alkali agricultural area, and provide scientific basis for the construction of high and stable yield fields of crops in soda saline-alkali soils. Based on the unsaturated soil water movement theory and the convection-dispersion theory of solute transport in porous media, a single-parameter and two-parameter model of saline-alkali transport was constructed to analyze the distribution of saline-alkali concentration in soil solution with the depth of soil layer. Soil samples were taken from four soda saline-alkali soils in different periods under sub-soiling tillage. The experimental data of soil saline-alkali content were obtained, and the law of saline-alkali migration was analyzed. When the depth was 60 cm, the content of saline-alkali in the soil before breaking the plough bottom was 0.4%, and the content of saline-alkali was 0.35% after breaking the plough bottom with sub-soiling technique. It can be seen that sub-soiling technique can promote saline-alkali infiltration and reduce the content of saline-alkali in the planting soil layer. The average water content of the sub-soiled soil was 23.4%, which was significantly higher than that of the subsoiled soil. The soil salinity and alkali content in 100 cm depth layer decreased by 30.8%, and that in 40 cm depth layer decreased by 57%. The salinity and alkali data in different regions showed that the soil salinity and alkali content in the soil decreased by 30.8%. Saline-alkali data from different regions show that due to sub-soiling, salt-alkali in the soil moves upward, salt-alkali in the lower part of crop roots moves outward, and salt-alkali in the soil moves away from the crop root zone; between 0 and 50 cm under the soil, the content of soil salt and alkali is from small to large, forming a desalination area of saline and alkali content; sub-soiling tillage makes 0-30 cm layer soil desalinization rate reach 83.5%, the soil salt removal rate of 0-60 cm layer reached 79.9%; The effect of sub-soiling on soil salinity is less than 1.634% of the initial value. Conclusion: sub-soiling technology can effectively reduce saline alkali content and increase crop yield in soda saline alkali soil.

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Section: Discussionsupporting

confidence: 53%

Saline-alkali migration in soda saline soil based on sub-soiling technology

Yuan¹,

Feng²,

Jang³

et al. 2019

Desalination and Water Treatment

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“…Previous studies have successfully been carried out using remote sensing geospatial tools in a related study at the same profile area. For example, Barakat et al [20] have used ASTER (Advanced Spaceborne Thermal Emission and Reflection Radiometer) and Sentinel-2A MSI images, acquired in 2001 and 2015 respectively, for quantifying the changes in the Eastern area of Béni-Mellal province based on the supervised classification algorithm and the normalized difference vegetation index (NDVI). The study showed that changes in land use have resulted in the increase of forest area.…”

Section: Discussionmentioning

confidence: 99%

Land Use/Land Cover (LULC) Using Landsat Data Series (MSS, TM, ETM+ and OLI) in Azrou Forest, in the Central Middle Atlas of Morocco

et al. 2018

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The study of land use/land cover (LULC) has become an increasingly important stage in the development of forest ecosystems strategies. Hence, the main goal of this study was to describe the vegetation change of Azrou Forest in the Middle Atlas, Morocco, between 1987 and 2017. To achieve this, a set of Landsat images, including one Multispectral Scanner (MSS) scene from 1987; one Enhanced Thematic Mapper Plus (ETM+) scene from 2000; two Thematic Mapper (TM) scenes from 1995 and 2011; and one Landsat 8 Operational Land Imager (OLI) scene from 2017; were acquired and processed. Ground-based survey data and the normalized difference vegetation index (NDVI) were used to identify and to improve the discrimination between LULC categories. Then, the maximum likelihood (ML) classification method was applied was applied, in order to produce land cover maps for each year. Three classes were considered by the classification of NDVI value: low-density vegetation; moderate-density vegetation, and high-density vegetation. Our study achieved classification accuracies of 66.8% (1987), 99.9% (1995), 99.8% (2000), 99.9% (2011), and 99.9% (2017). The results from the Landsat-based image analysis show that the area of low-density vegetation was decreased from 27.4% to 2.1% over the past 30 years. While, in 2017, the class of high-density vegetation was increased to 64.6% of the total area of study area. The results of this study show that the total forest cover remained stable. The present study highlights the importance of the image classification algorithms combined with NDVI index for better understanding the changes that have occurred in this forest. Therefore, the findings of this study could assist planners and decision-makers to guide, in a good manner, the sustainable land development of areas with similar backgrounds.

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“…Mapping areas of forest cover change is essential for developing locally adapted strategies to better control these dynamics (de Wasseige et al 2014). Remote sensing has proven to be an essential low-expensive and effective technology for determining land cover and land use dynamics over several decades and at different scales (Loveland and Dwyer 2012;Hansen et al 2013;Wani et al 2016;Mukete et al 2017;Barakat et al 2018). One of the first steps in implementing REDD þ is the estimation and monitoring of carbon stocks in different land-use.…”

Section: Introductionmentioning

confidence: 99%

Spatial and temporal dynamic of land-cover/land-use and carbon stocks in Eastern Cameroon: a case study of the teaching and research forest of the University of Dschang

Temgoua

Solefack

Voufo

et al. 2018

Forest Science and Technology

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This study was carried out in the teaching and research forest of the University of Dschang in Belabo, with the aim of analysing land-cover and land-use changes as well as carbon stocks dynamic. The databases used are composed of three Landsat satellite images (5TM of 1984, 7ETM þ of 2000 and 8OLI of 2016), enhanced by field missions. Satellite images were processed using ENVI and ArcGIS software. Interview, focus group discussion methods and participatory mapping were used to identify the activities carried out by the local population. An inventory design consisting of four transects was used to measure dendrometric parameters and to identify land-use types. An estimation of carbon stocks in aboveground and underground woody biomass was made using allometric models based on non-destructive method. Dynamic of land-cover showed that the average annual rate of deforestation is 0.48%. The main activities at the base of this change are agriculture, house built-up and logging. Seven types of land-use were identified; adult secondary forests (64.10%), young secondary forests (7.54%), wetlands (7.39%), fallows (3.63%), savannahs (9.59%), cocoa farms (4.28%) and mixed crop farms (3.47%). Adult secondary forests had the highest amount of carbon (250.75 t C ha À1 ). This value has decreased by more than 60% for mixed crop farms (94.67 t C ha À1 ), showing the impact of agricultural activities on both forest cover and carbon stocks. Agroforestry systems that allow conservation and introduction of woody species should be encouraged as part of a participatory management strategy of this forest. ARTICLE HISTORY

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Monitoring of forest cover dynamics in eastern area of Béni-Mellal Province using ASTER and Sentinel-2A multispectral data

Cited by 45 publications

References 44 publications

Saline-alkali migration in soda saline soil based on sub-soiling technology

Saline-alkali migration in soda saline soil based on sub-soiling technology

Land Use/Land Cover (LULC) Using Landsat Data Series (MSS, TM, ETM+ and OLI) in Azrou Forest, in the Central Middle Atlas of Morocco

Spatial and temporal dynamic of land-cover/land-use and carbon stocks in Eastern Cameroon: a case study of the teaching and research forest of the University of Dschang

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