Investigating the Water Quality of the Water Resources Bank of Egypt: Lake Nasser

El-Mahdy, Mohamed El-Sayed; Abbas, Mohamed S.; Sobhy, Hassan M.

doi:10.1007/698_2018_331

Cited by 6 publications

(3 citation statements)

References 25 publications

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“…Irrigation water properties for all collected samples were similar among different sectors (Table 3). This result was expected as irrigation water came from the same source (Lake Nasser), which has high-quality irrigation water for the proposed crops according to FAO [68] and El-Mahdy, et al [69], who indicated the suitability of Lake Naser water for drinking and irrigation. These findings also are found to be in agreement with previous work of Fayed, et al [70].…”

Section: Soil and Irrigation Water Propertiesmentioning

confidence: 89%

Crop Water Requirements and Suitability Assessment in Arid Environments: A New Approach

et al. 2021

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Efficient land and water management require the accurate selection of suitable crops that are compatible with soil and crop water requirements (CWR) in a given area. In this study, twenty soil profiles are collected to represent the soils of the study area. Physical and chemical properties of soil, in addition to irrigation water quality, provided data are utilized by the Agriculture Land Evaluation System for Arid and semi-arid regions (ALES-Arid) to determine crop suitability. University of Idaho Ref-ET software is used to calculate CWR from weather data while the Surface Energy Balance Algorithms for Land Model (SEBAL) is utilized to estimate CWR from remote sensing data. The obtained results show that seasonal weather-based CWR of the most suitable field crops (S1 and S2 classes) ranges from 804 to 1625 mm for wheat and berssem, respectively, and ranges from 778 to 993 mm in the vegetable crops potato and watermelon, respectively, under surface irrigation. Mean daily satellite-based CWR are predicted based on SEBAL ranges between 4.79 and 3.62 mm in Toshka and Abu Simbel areas respectively. This study provides a new approach for coupling ALES-Arid, Ref-ET and SEBAL models to facilitate the selection of suitable crops and offers an excellent source for predicting CWR in arid environments. The findings of this research will help in managing the future marginal land reclamation projects in arid and semi-arid areas of the world.

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Section: Soil and Irrigation Water Propertiesmentioning

confidence: 89%

Crop Water Requirements and Suitability Assessment in Arid Environments: A New Approach

et al. 2021

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“…A constant boundary concentration of TDS was assigned along the model border (Figure 4b). The assigned concentration for the lake was 200 mg/L [67], while the assigned concentration along other borders varied from 200 to 3000 mg/L based on the literature. The calibration of TDS distribution was achieved when the calculated concentration value was consistent with those observed.…”

Section: Model Calibrationmentioning

confidence: 99%

Integrated Management and Environmental Impact Assessment of Sustainable Groundwater-Dependent Development in Toshka District, Egypt

Aly

Elhamid

Abu-Bakr

et al. 2023

Water

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Egypt has recently inaugurated a mega development project aiming to alleviate the overpopulation along the Nile River and to meet the looming food gap. Toshka is a promising area where groundwater-dependent activities are being expanded adjacent to Lake Nasser. Thus, it is of utmost importance to provide a sustainable development approach and to assess the resulting environmental implications. Accordingly, a coupled groundwater flow and transport model was invoked. The generated model was successfully calibrated for the observed water levels and salinity. The proposed exploitation regime of 102 wells each pumping 1000 m3/day was simulated for a 100-year test period. The maximum resulting drawdown was about 25 m, compatible with the advocated sustainable restriction limit. Climate change (CC) impacts of reducing the lake’s storage and increasing the crops’ water requirements were investigated. The lake’s water level fluctuations were a key factor in the aquifer hydraulics and flow direction. The drawdown breakthrough considering the CC catastrophic scenario (RCP8.5) has increased by about 20%. The developed solute transport model was utilized to simulate the salinity spatial distribution and the lateral movement of leaking pollutants from the underway activities. Cultivation activities were found feasible up to 80 km away from the lake border where salinity does not exceed 2000 ppm. Yet, a protection strip of not less than 4.8, 6.0, and 7.2 km according to the lake operating condition is inevitable to ensure that pollutants do not intrude into the lake. These findings will assist the decision-makers in scheming environmental impact assessment criteria for sustainable development.

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“…wide range of climate change consequences. Even a slight change in climate can result in huge changes in lake salinity and levels (El-Mahdy et al, 2018, Mengistu et al, 2014, Tamiru, 2011.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Climate Change Impact on Extreme Temperature Variability in the Blue Nile Basin, Ethiopia

Mohamed¹,

El-Mahdy²

2020

Preprint

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Abstract. In this paper, spatial and temporal patterns of changes in extreme temperatures are investigated using 10 meteorological stations data for the period 1950–2018 in the Blue Nile basin. Monthly temperature data for the basin were used in the study. Long-term trends in the Blue Nile Basin annual and monthly temperatures were investigated. The statistical significance of the trend is calculated by applying the Mann-Kendall (MK) test. The analysis of data was performed using the coefficient of variance, anomaly index. The results showed that the annual maximum and minimum temperature is increasing significantly with a magnitude of 0.037° and 0.025 °C per decade respectively in the period from 1950–2018. The result of the Mann-Kendall analysis test revealed a marked increase in mean maximum and minimum temperatures trend over time significantly during the study period (the minimum temperature rate is more evident than the maximum). The long-term anomalies of mean annual minimum temperature revealed the inter-annual variability while the trend after 1977 was higher than the long-term average that is proof of the warming trend existence since the last two decades of the 20th century.

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Investigating the Water Quality of the Water Resources Bank of Egypt: Lake Nasser

Cited by 6 publications

References 25 publications

Crop Water Requirements and Suitability Assessment in Arid Environments: A New Approach

Crop Water Requirements and Suitability Assessment in Arid Environments: A New Approach

Integrated Management and Environmental Impact Assessment of Sustainable Groundwater-Dependent Development in Toshka District, Egypt

Evaluation of Climate Change Impact on Extreme Temperature Variability in the Blue Nile Basin, Ethiopia

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