Mapping Soil Salinity and Evaluation of Water Quality in Siwa Oasis Using GIS

Elnaggar, A.; El-Hamidi, K.; Mousa, Mohamed; Albakry, M.

doi:10.21608/jssae.2017.37078

Cited by 8 publications

(7 citation statements)

References 12 publications

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“…The fungal strains used in the present study were isolated from Siwa Oasis (soil and water), and from a salt lakes (water and sludge), Egypt. According to Elnaggar et al [11], the salinity of Siwa soil was EC=77 dS m -1 (and ESP=14.62 in average). Samples were collected in sterile containers, transferred to the lab within 24 h and stored at 4º C. They were identified at Assiut University Mycological Center, Accession No AUMC 3200-3221.Mineral salt yeast extract medium (MSY) [12], and Malt extract agar [13] were used for isolation and degradation experiments.…”

Section: Microorganismsmentioning

confidence: 97%

Biodegradation of Two Synthetic Polyesters (PCL, BTA) under Salt Stress

Barkat¹,

Abou‐Zeid²,

Sabry³

2020

EESRJ

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The target of this study was to isolate fungal strains from saline environments able to degrade two synthetic polyesters (PCL, poly (-ɛ-caprolactone) and adipic acid (1, 4butanediol, terephthalic-adipic, BTA).The clear zone method on mineral salt yeast extract medium (MSY) containing polymers was adopted to compare the degradative efficacy of isolated fungi. Scanning electron microscope as well was used to examine polymer degradation by Aspergillus flavus. Through this study a total of 22 fungal strains were isolated and identified as members of the genera Aspergillus, Acremonium, Cladosporium and Penicillium. The results indicate that isolated fungi can be divided into several groups according to their response to additional carbon and/or nitrogen sources such as glucose, peptone, casein, and others which led to an increase in the radial growth and hence an increased clear zone diameter. Scanning Electron micrographs of Aspergillus flavus confirmed the results of weight loss and exposed the presence of fungal growth on PCL-S MATER Bi ZF03U films. The film surfaces exposed to the fungal strains had a rough appearance visibly different from that of the control. The surface of the films possessed numerous pits depths of varying sizes. The fungal mycelium growing on and invading the polyester material thereby cracking the film surface was also obvious. The findings of this research may contribute to realize the role of fungi in biodegradation of nondegradable synthetic polymers.

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Section: Microorganismsmentioning

confidence: 97%

Biodegradation of Two Synthetic Polyesters (PCL, BTA) under Salt Stress

Barkat¹,

Abou‐Zeid²,

Sabry³

2020

EESRJ

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“…Water logging and consequentially salinization are the major land degradation problems especially under the arid and semi-arid climates (Dwivedi et al, 1999;Elnaggar et al, 2017). El- Baroudy and Moghanm (2014) found that the productivity of more than 70% of soils in the middle part of the Nile-Delta was declined due to the improper land management practices.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Land Degradation in Agricultural Areas within Damietta Governorate, Egypt Caused by Urban Encroachment, Salinity, Sodicity and Loss of Fertility

Elnaggar

2020

Journal of Soil Sciences and Agricultural Engineering

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Land degradation is one of the most serious problems over time, where it is the main cause of declining agricultural productivity worldwide. The main objectives of this work were to monitor and evaluate land degradation of agricultural area in Damietta Governorate caused by urban encroachment, salinity, sodicity and loss of fertility. Accordingly, Landsat images were collected at four periods of time (1989, 2000, 2014 and 2019) to study the spatio-temporal changes in agricultural land over time. The soil adjusted vegetation index (SAVI) was used for studying the vegetation cover. Soil samples were also collected from 30 soil-profiles at three soil depth intervals (0-30, 30-60, and 60-90 cm). They were analyzed for pH, EC, ESP and available NPK values. Ordinary Kriging (OK) was used for the surface interpolation of these soil properties. The obtained results indicated a significant reduction in agricultural land within Damietta Governorate from 502.45 km 2 (78.94%) in 2000 to 463.66 km 2 (72.85%) in 2019. Salt affected soils (SASs) were dramatically increased (particularly in subsurface layers) due to the poor drainage in the area and sea-water intrusion either from the Mediterranean Sea and/ or Manzala Lake. The status of available nitrogen and phosphorous ranged between low and moderate, whereas available potassium was very high in most of the studied locations. In conclusion, agricultural lands in Damietta Governorate are seriously affected by land degradation resulted from urban sprawl, salinity, sodicity and loss of fertility. Therefore, they need to enact laws and develop a special program for their management and remediation.

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“…It is the largest oasis among the Egyptian oases, which is located about 530 kilometers west of the Nile valley and 250 kilometers south of the Mediterranean Sea. It represents a promising area for land reclamation and agriculture expansion in the western desert of Egypt due to the availability of water resources (Elnaggar et al 2017). At the same time, environmental problems, such as waterlogging and soil salinization, are major challenges that undermine sustainable land management and consequently agriculture sustainability in Siwa oasis, where agriculture represents the basis of Siwa economy (IUCN 2000;Al-Kadi 2003).…”

Section: Introductionmentioning

confidence: 99%

“…Several authors have documented these environmental problems and their negative impact on the agricultural land of the oasis (AbdelRahman et al 2019; Aly 2019;Elnaggar et al 2017;Rashed 2016;Abdul Ghafar 2014;Masoud and Koike 2006). Generally, waterlogging problems can be classified as natural, quasinatural and anthropogenic based on their origin and they may be permanent or seasonal based on time scale (Sahu 2018).…”

Section: Introductionmentioning

confidence: 99%

Challenges of Sustainable Land Management in Siwa Oasis: The Waterlogging Problem in the Newly Reclaimed Desert Land

EL-Kawy

2019

Journal of Soil Sciences and Agricultural Engineering

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Accurate and frequent information about waterlogging problems is very necessary for the sustainable land management. The objectives of this research are to detect and mapping the vegetated and waterlogged areas in a newly reclaimed desert land in Siwa oasis, using remote sensing data and techniques; and suggest a future plan to solve the waterlogging problem. The Normalized Difference Vegetation Index (NDVI) and the Modified Normalized Difference Water Index (MNDWI) algorithms were applied on four Landsat images (2009, 2012, 2015 and 2018) to detect and map the vegetation and waterlogging states, respectively. The results of NDVI revealed that the cultivated land was increased by 2.3 times in nine years (2009)(2010)(2011)(2012)(2013)(2014)(2015)(2016)(2017)(2018) due to private land reclamation process. The results of MNDWI indicated that the waterlogged area was increased remarkably by 21 times during nine years, where it increased remarkably from 19 ha in 2009 to 393 ha in 2018. The development of the waterlogged areas was most likely due to the increase in the surface water level of Lake Aghormy North of the study area, as well as the trapping of the agricultural drainage water and well-water overflow between the sand dune formations. This study recommended a strategy to solve the waterlogging problem, which include the establishment of a surface drainage network covering the study area. This network should be connected with a main drain at the Northern border of the study area. This strategy will enhance the drainage conditions and solve the waterlogging problem in the area.

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Mapping Soil Salinity and Evaluation of Water Quality in Siwa Oasis Using GIS

Cited by 8 publications

References 12 publications

Biodegradation of Two Synthetic Polyesters (PCL, BTA) under Salt Stress

Biodegradation of Two Synthetic Polyesters (PCL, BTA) under Salt Stress

Evaluation of Land Degradation in Agricultural Areas within Damietta Governorate, Egypt Caused by Urban Encroachment, Salinity, Sodicity and Loss of Fertility

Challenges of Sustainable Land Management in Siwa Oasis: The Waterlogging Problem in the Newly Reclaimed Desert Land

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