Mapping soil salinity in the East Nile Delta using several methodological approaches of salinity assessment

Hammam, Amr A.; Mohamed, Elsayed Said

doi:10.1016/j.ejrs.2018.11.002

Cited by 68 publications

(65 citation statements)

References 12 publications

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“…Moreover, decreasing NDVI values from 0.5-0.69 in 1995 to 0.4-0.62 in 2018 occurred in areas that were affected by salinization processes. These observations are consistent with the findings of [49], who also pointed out the negative impact of soil degradation due to the deterioration of the land cover on the NDVI values.…”

Section: Ndvi Changes and Human Activitysupporting

confidence: 93%

Evaluating the Effects of Human Activity over the Last Decades on the Soil Organic Carbon Pool Using Satellite Imagery and GIS Techniques in the Nile Delta Area, Egypt

et al. 2019

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The study aims to clarify the relationship between soil organic carbon (SOC) and human activity under arid conditions, in the east area of the Nile Delta, Egypt. SOC is one of the critical factors in food production and plays an important role in the climate change because it affects the physio-chemical soil characteristics, plant growth, and contributes to sustainable development on global levels. For the purpose of our investigations, 120 soil samples (0–30 cm) were collected throughout different land uses and soil types of the study area. Multiple linear regressions (MLR) were used to investigate the spatiotemporal relationship of SOC, soil characteristics, and environmental factors. Remote sensing data acquired from Landsat 5 TM in July 1995 and operational land imager (OLI) in July 2018 were used to model SOC pool. The results revealed significant variations of soil organic carbon pool (SOCP) among different soil textures and land-uses. Soil with high clay content revealed an increase in the percentage of soil organic carbon, and had mean SOCP of 6.08 ± 1.91 Mg C ha−1, followed by clay loams and loamy soils. The higher values of SOCP were observed in the northern regions of the study area. The phenomenon is associated with the expansion of the human activity of initiating fish ponds that reflected higher values of SOC that were related to the organic additions used as nutrients for fish. Nevertheless, the SOC values decreased in southeast of the study area with the decrease of soil moisture contents and the increase in the heavy texture profiles. As a whole, our findings pointed out that the human factor has had a significant impact on the variation of soil organic carbon values in the Eastern Nile Delta from 1995 to 2018. As land use changes from agricultural activity to fish ponds, the SOCP significantly increased. The agriculture land-use revealed higher SOCP with 60.77 Mg C ha−1 in clay soils followed by fish ponds with 53.43 Mg C ha−1. The results also showed a decrease in SOCP values due to an increasing in land surface temperature (LST) thus highlighting that influence of temperature and ambient soil conditions linked to land-use changes have a marked impact on surface SOCP and C sequestration.

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Section: Ndvi Changes and Human Activitysupporting

confidence: 93%

Evaluating the Effects of Human Activity over the Last Decades on the Soil Organic Carbon Pool Using Satellite Imagery and GIS Techniques in the Nile Delta Area, Egypt

et al. 2019

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“…In Egypt, there are different environmental applications of remotely sensed data and GIS which are extensively utilized for assessing, modeling and monitoring different environmental variables and problems [e.g. [47][48][49][50][51][52][53][54][55][56][57][58][59]. Adding the application of mosquito studies will reinforce sustainability and vulnerability studies which will be adopted in the upcoming studies for supporting the Egyptian developmental plans.…”

Section: Discussionmentioning

confidence: 99%

Environmental sensitivity to mosquito transmitted diseases in El-Fayoum using spatial analyses

2020

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El-Fayoum governorate has unique characteristics which induces mosquito proliferation and thus increased the risk arisen from diseases transmission. Present study explores the role of remote sensing and GIS modeling integrated with field survey for mapping mosquito breeding sites and the areas under risk of diseases transmission in El-Fayoum governorate. Entomological surveys were conducted for a total number of 40 accessible breeding sites during the period 12-16 November 2017. A calibrated Landsat OLI image, synchronized with the field trip, was processed to produce Normalized Difference Vegetation Index (NDVI), Normalized Difference Moisture Index (NDMI), and Land Surface Temperature (LST). A cartographic GIS model was generated to predict breeding sites in the whole governorate and to assess the potential risk. The main filarial disease vector (Culex pipiens) was abundant at Atsa district, while Malaria vectors (Anopheles sergentii and Anopheles multicolor) were mainly distributed in El-Fayoum and Youssef El-Seddiq districts. Means levels of NDVI, NDMI and LST at breeding habitats were recorded; 0.18, 0.08 and 21.75° C, respectively. Results of the model showed that the highest predicted risk area was reported at Atsa district (94.4 km2) and Yousef El-Sediq (81.8 km2) while the lowest prediction was observed at Abshawai district (35.9 km2). It can be concluded that Atsa, Yousef El-Sedik and El-Fayoum districts are more vulnerable to Malaria and Filaria diseases outbreaks, thus precaution and pest control methods must be applied to mitigate the possible risks.

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“…Therefore, by 2020 is expected about 20 percent will be consuming more than it has in Egypt. Water scarcity in Egypt could endanger the country and create instability [1][2][3] Estimating the volume of runoff in the northern regions of Egypt is considered one of the important things to explain how to take advantage of the lost water that causes many environmental hazards such as soil degradation, desertification and many environmental hazards [4][5][6][7][8][9].Surrounding factors such as terrain and climate are influence the rate of soil erosion, as the precipitation rate is the main factor determining the volume of runoff and the excess water moves from the surface towards the natural slope. Moreover, the runoff flow rate depends on several factors such as rainfall intensity, soil texture, infiltration rate, organic matter contents, vegetation cover, slope and aspect [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Estimation of surface runoff using NRCS curve number in some areas in northwest coast, Egypt

et al. 2020

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The sustainable agricultural development in the northwest coast of Egypt suffers constantly from the effects of surface runoff. Moreover, there is an urgent need by decision makers to know the effects of runoff. So the aim of this work is to integrate remote sensing and field data and the natural resource conservation service curve number model (NRCS-CN).using geographic information systems (GIS) for spatial evaluation of surface runoff .CN approach to assessment the effect of patio-temporal variations of different soil types as well as potential climate change impact on surface runoff. DEM was used to describe the effects of slope variables on water retention and surface runoff volumes. In addition the results reflects that the magnitude of surface runoff is associated with CN values using NRCS-CN model . The average of water retention ranging between 2.5 to 3.9m the results illustrated that the highest value of runoff is distinguished around the urban area and its surrounding where it ranged between 138 - 199 mm. The results show an increase in the amount of surface runoff to 199 mm when rainfall increases 200 mm / year. The north of the area may be exposed to erosion hazards more than the south and a change in the soil quality may occur in addition to the environmental imbalance in the region.

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Mapping soil salinity in the East Nile Delta using several methodological approaches of salinity assessment

Cited by 68 publications

References 12 publications

Evaluating the Effects of Human Activity over the Last Decades on the Soil Organic Carbon Pool Using Satellite Imagery and GIS Techniques in the Nile Delta Area, Egypt

Evaluating the Effects of Human Activity over the Last Decades on the Soil Organic Carbon Pool Using Satellite Imagery and GIS Techniques in the Nile Delta Area, Egypt

Environmental sensitivity to mosquito transmitted diseases in El-Fayoum using spatial analyses

Estimation of surface runoff using NRCS curve number in some areas in northwest coast, Egypt

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