Remote sensing-based techniques for water management in small-scale farms in arid climate

Elsayed, Hamdy; Ibrahim, Huda; Farag, Hanan; Sobeih, M. F.

doi:10.2166/ws.2022.288

Cited by 5 publications

(2 citation statements)

References 40 publications

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“…In Egypt, field irrigation efficiency ranges from 60 to 70% (Abdelkader et al, 2018;Ayyad et al, 2019;Elsayed et al, 2022;Nikiel & Eltahir, 2021). Since the analysis focuses on future scenarios, we chose an irrigation efficiency of 70%.…”

Section: Scenario Assumptionsmentioning

confidence: 99%

Potential Improvements in Crop Production in Egypt and Implications for Future Water and Land Demand

Ayyad,

Karimi,

Ribbe

et al. 2024

Int. J. Plant Prod.

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Similar to numerous water- and data-scarce regions, Egypt confronts a critical challenge in sustaining food production for its rapidly growing population. Consequently, the country’s water and land resources are under considerable stress and require careful management. About half of Egypt’s both annually harvested areas and renewable freshwater are allocated for cultivating rice, maize, wheat, and berseem clover. However, the extent to which crop production might be improved and how this would impact future water and land requirements remains poorly understood. We analyzed potential improvements in the production of these crops and quantified their future water and land requirements under different scenarios. Potential improvements were detected through percentile analysis in three remote sensing-derived performance indicators for each crop in the Nile Delta’s Zankalon region: (i) crop yield, (ii) crop water productivity, and (iii) transpiration fraction (transpiration to actual evapotranspiration, T/AET). We applied detected improvementsto construct plausible scenarios for Egypt’s water and land requirements to sustain domestic crop production until 2050. Our findings indicate limited potential to improve T/AET (< 4%). However, improvements of up to 27% for crop yields and up to 14% for water productivity are possible. To meet the production targets by 2050, national production must increase by 128, 78, 69, and 71% above the 2016–2020’s average for rice, maize, wheat, and berseem, respectively. Depending on the improvement levels in the developed scenarios, a total harvested land area between 5.3 and 6.4 million ha will be required by 2050, with 18% allocated to rice, 28% to maize, 36% to wheat, and 18% to berseem. Associated freshwater requirements will amount to 59–68 billion cubic meters, divided into 23% for rice, 34% for maize, 28% for wheat, and 15% for berseem. Interventions increasing yields and water productivity will benefit more the summer (rice and maize) than the winter crops (wheat and berseem). We discuss likely interventions for meeting these requirements and for sustaining the supply of these crops in Egypt.

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Section: Scenario Assumptionsmentioning

confidence: 99%

Potential Improvements in Crop Production in Egypt and Implications for Future Water and Land Demand

Ayyad,

Karimi,

Ribbe

et al. 2024

Int. J. Plant Prod.

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“…It has been used for global sensitivity analyses for various models [43]. It can be used to measure the statistical significance of the difference between two different methods or more [44]. In this case, the ANOVA is being used to compare the groundwater levels of different locations.…”

Section: Anova Testmentioning

confidence: 99%

Impact of Soil Surface Temperature on Changes in the Groundwater Level

Khamidov,

Ishchanov,

Hamidov

et al. 2023

Water

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The relationship between the soil surface temperature and groundwater level is complex and influenced by various factors. As the soil surface temperature increases, water evaporates quickly from the soil, which can lead to a decrease in the groundwater level. In this study, we analyzed the impact of soil surface temperature on changes in the groundwater level in the Bukhara region of Uzbekistan using data from 1991 to 2020. The Bukhara region experiences regular water shortages, increased soil salinization, and inefficient energy in lift-irrigated areas, which is a typical constellation of challenges to the water–energy–food–environment (WEFE) nexus. The soil surface temperature data were collected from the Hydrometeorological Service Agency, whereas groundwater level data were obtained from the database of the Amelioration Expedition under the Amu-Bukhara Basin Irrigation Systems Authority. We used linear regression analysis and Analysis of Variance (ANOVA) tests to establish the significance of the relationship between the soil surface temperature and groundwater level, as well as the impact of the location of the groundwater level measurements. The results indicate that the model was a good fit to the data, and both the intercept and the soil surface temperature were significant factors that affected groundwater level. The results further suggest that the strength of the relationship between solar radiation and soil surface temperature is very high, with a correlation coefficient of 0.840. This means that when solar radiation increases, soil surface temperature also tends to increase. The analysis also showed that 53.5% of the changes in groundwater level were observed by the regression model, indicating a moderately correlated relationship between the groundwater level and soil surface temperature. Finally, higher solar radiation leads to higher soil surface temperature and higher evapotranspiration rates, which can lead to a decrease in groundwater level. As a result, we observe that the soil surface temperature determines changes in the groundwater level in the study region.

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Tailoring the surface energy balance algorithm for land-improved (SEBALI) model using high-resolution land/use land cover for monitoring actual evapotranspiration

Mekonnen,

Alamirew,

Malede

et al. 2024

Agricultural Water Management

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Remote sensing-based techniques for water management in small-scale farms in arid climate

Cited by 5 publications

References 40 publications

Potential Improvements in Crop Production in Egypt and Implications for Future Water and Land Demand

Potential Improvements in Crop Production in Egypt and Implications for Future Water and Land Demand

Impact of Soil Surface Temperature on Changes in the Groundwater Level

Tailoring the surface energy balance algorithm for land-improved (SEBALI) model using high-resolution land/use land cover for monitoring actual evapotranspiration

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