Assessment of the DRAINMOD-N II model for simulating nitrogen losses in newly reclaimed lands of Egypt

Hawary, A. El; Atta, Y.; El-Saadi, Aiman

doi:10.1016/j.aej.2015.05.020

Cited by 4 publications

(1 citation statement)

References 10 publications

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“…(i) Transpiration fraction (T/AET, dimensionless): the ratio of transpiration (T, in m 3 /ha), which pertains to the productive portion of actual evapotranspiration (AET), to the total AET (in m 3 /ha) that includes both productive and nonproductive evaporation fluxes. (Sadras et al, 2016;Wang et al, 2012) 0.66 (C3) (b) (Sadras et al, 2016;Wang et al, 2012) 0.82 (C3) (Sadras et al, 2016;Wang et al, 2012) 1.4 (C4) (Sadras et al, 2016;Wang et al, 2012) Harvest index 0.5 (El Hawary et al, 2015;Kheir et al, 2021b) 0.95 (b) (FAO, 2023a;Sadras et al, 2016) 0.48 (Mousa & Abdelghany, 2022) 0.4 (Kandil, 2013;Salama et al, 2021) Aboveground over total biomass 0.9 (El Hawary et al, 2015) 0.9 (a) (Giambalvo et al, 2011) 0.8 (Mekawy et al, 2015;Nada & Abogadallah, 2018) 0.92 (a) (Ordóñez et al, 2020) Moisture content (%)…”

Section: Performance Indicatorsmentioning

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: Performance Indicatorsmentioning

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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Assessing water and nitrate‐N losses from subsurface‐drained paddy lands by DRAINMOD‐N II

Hashemi

Darzi‐Naftchali

2020

Irrigation and Drainage

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In this study, the effects of various drainage systems on water and nitrate-N losses were investigated using DRAINMOD-N II. Required field data were obtained during three growing seasons of canola in a subsurface drainage pilot in Mazandaran Province, northern Iran. The calibrated model was used to assess the effects of different drain depths (D = 0.10-0.90 m with 0.10 m intervals) and spacing (L = 10-90 m with 10 m intervals) on seasonal drainage water and NO 3 −-N concentration in drainage effluents. DRAINMOD-N II performance was assessed using different criteria including absolute deviation (AD), root mean square error (RMSE) and determination coefficient (R 2). The simulated and observed drainage discharges (0.97 vs 0.96 mm day −1) and NO 3-N concentrations (9.1 vs 14.1 mg l −1) were in good agreement in the calibration process. The model performance was also acceptable in the validation process (AD = 0.59-0.79 mm day −1 ; RMSE = 1.01-1.28 mm day −1 ; R 2 = 0.59-0.79 for drainage discharge and AD = 8.3-16.3 mg l −1 ; RMSE = 12.4-27.6 mg l −1 ; R 2 = 0.4 for NO 3-N). Based on the scenario analyses, the D0.40L50 drainage system was the best one, resulting in fewer environmental effects from the nitrate-N and water loss viewpoints.

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Improvement of the Water Erosion Prediction Project (WEPP) model for quantifying field scale subsurface drainage discharge

Revuelta-Acosta

Flanagan

Engel

et al. 2021

Agricultural Water Management

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Assessment of the DRAINMOD-N II model for simulating nitrogen losses in newly reclaimed lands of Egypt

Cited by 4 publications

References 10 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

Assessing water and nitrate‐N losses from subsurface‐drained paddy lands by DRAINMOD‐N II

Improvement of the Water Erosion Prediction Project (WEPP) model for quantifying field scale subsurface drainage discharge

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