Abdulrahim Al-Ismaili

Abdulrahim Al-Ismaili
Sultan Qaboos University | SQU · Department of Soils, Water and Agricultural Engineering

PhD

About

44
Publications
32,582
Reads
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409
Citations
Citations since 2016
31 Research Items
371 Citations
2016201720182019202020212022020406080100
2016201720182019202020212022020406080100
2016201720182019202020212022020406080100
2016201720182019202020212022020406080100
Additional affiliations
September 2009 - October 2016
Sultan Qaboos University
Position
  • Professor (Assistant)
August 1999 - present
Sultan Qaboos University
Position
  • Research Assistant

Publications

Publications (44)
Article
Full-text available
Proper water allocation plays a key role in sustainable water resources management due to limited water resources and increasing demand for agricultural water consumption. Although the soil water balance approach is widely used to determine agricultural water allocation, simultaneous application of this approach and optimization of agricultural wat...
Article
Background Greenhouse cooling is very essential during warm conditions to extend the cropping season and offer year-round production. Although fan-pad systems are widely utilized for greenhouse cooling in arid climates, they have many drawbacks mentioned by researchers. Thus, finding the best cooling system had attracted the attention of many resea...
Article
Seawater greenhouse (SWGH) is a technology established to overcome issues related to open field cultivation in arid areas, such as the high ambient temperature and the shortage of freshwater. It adopts the humidification-dehumidification concept where evaporated moisture from a saline water source is condensed to produce freshwater within the green...
Article
This study aimed to explore the potential of developing a novel cooling system combining a greenhouse and an earth-tube heat exchanger (ETHE). In this system, greenhouse air is circulated through the underneath soil mass to use the deep-soil cooling effect. This was achieved through the following steps. First, soil temperature profile inside and ou...
Article
Full-text available
Abstract. The presence of microorganisms is one of the major factors affecting the quality of dried fish. In this project, a number of analytical tests were used to verify the presence of biochemical contamination in dried fish, as well as to propose an engineering solution to reduce the incidence of these contaminations. Two types of fish samples...
Conference Paper
Full-text available
Greenhouse cropping is growing at a fast rate in arid areas. However, performance evaluation of valuable resources, such as land, water and energy, was not given a proper attention. This study aimed to evaluate the sustainability of greenhouse cropping systems from technical and financial standpoints. Three cucumber single-span greenhouse farms in...
Article
Full-text available
Sustainable agricultural production could be assessed through energy-use efficiency (EUE). Thus, this paper aims to evaluate the EUE for cucumber greenhouse production in Oman. Data were obtained by interviewing farmers (face-to-face). Result indicated that total energy inputs (e.g. electricity, water, fertilizers and agrochemicals) and total energ...
Article
7 In this paper, we investigate for the first time the performance of the greenhouse (GH) production in 8 the Sultanate of Oman. We employ a two-stage approach. In the first stage, data envelopment 9 analysis (DEA) is used to estimate the efficiency of the GH farmers and pinpoint the wasted 10 resources. The efficiency results show that 79% of GH f...
Article
Full-text available
Geographic Information System (GIS) tools have been utilized in greenhouse cropping systems for detection, identifying, and mapping. This study aimed to study the spatiotemporal distribution of greenhouses (GHs) and the driving factors affecting this distribution in Al-Batinah South, Oman using GIS Mapping. First, a field survey was conducted betwe...
Article
The prediction of freshwater production from the condenser of an agricultural seawater greenhouse is important for designing the greenhouse process. Two models, namely, Artificial Neural Network and multilinear regression (denoted as ANN and RA, respectively), were developed and tested to predict the freshwater production rate considering ambient s...
Article
The present work investigates the effect of solar drying methods on the color and textural attributes of Khalas dates at three ripening stages (khalal, rutab and tamr) and evaluates color change kinetics using three kinetic models. Three solar drying methods, namely, open sun drying (OSD), forced convective drying (FCD) and greenhouse tunnel drying...
Article
The effect of solar drying methods on shrinkage and the corresponding influence on microstructural changes of dates at three ripening stages (khalal, rutab and tamr) were investigated and evaluated shrinkage models that are best describing the shrinkage behavior. Drying was accomplished by forced convective solar dryer, greenhouse tunnel dryer and...
Article
Full-text available
A study was carried out to evaluate the nutritional value of waste from lettuce, green cabbage, red cabbage and cauliflower to determine their potential use for feeding to livestock. Vegetable wastes were dried in a solar tunnel drier. The crude protein (CP), ether extract (EE), total ash, acid detergent fiber (ADF) and neutral detergent fiber (NDF...
Article
Background Seawater greenhouse (SWGH) is a technology established to overcome issues related to open field cultivation in arid areas like high temperatures and freshwater shortage. So far, five pilot Seawater greenhouses were built around the world; in Spain, United Arab Emirates, Oman, Australia and Somaliland. All the patents related to the Seawa...
Article
Full-text available
Seawater greenhouses (SWGH) utilize seawater or saline/brackish groundwater for cooling the microclimate and providing freshwater for irrigation through a humidification–dehumidification desalination process. The overall effectiveness of the SWGH greatly depends on the effectiveness of its condenser. The present study provides a good review on the...
Article
This paper presents an integrated steady-state model simulating the condenser of a seawater greenhouse in Oman. The developed model is capable of predicting the outlet air temperature and humidity, the outlet seawater temperature and the condensation rate. Validation experiments showed a good conformity between the predicted and measured values wit...
Article
Full-text available
In arid climates, extremely high temperatures in the summer and the chronic water scarcity put a firm barrier against agricultural development and sustainability. The SWGH technology is an engineering phenomenon that came to overcome both the constraints particularly in areas where seawater is accessible and/or brackish groundwater is available. It...
Conference Paper
Full-text available
In arid climates, extremely high temperatures in the summer and the chronic water scarcity put a firm barrier against agricultural development and sustainability. The SWGH technology is an engineering phenomenon that came to overcome both the constraints particularly in areas where seawater is accessible and/or brackish groundwater is available. It...
Article
The present manual sorting technique is not effective to detect fungal infection in dates; especially at the early stage. The potential of near infrared (NIR) area scan imaging (900–1700 nm together as one image) to detect fungal contamination in three popular varieties of dates (Fard, Khalas and Naghal) was investigated. Date samples were treated...
Article
Date powder was produced by foam-mat freeze-dried method without and with carrier agents (maltodextrin and gum arabic) at two concentration levels (40 and 50%). The effect of carrier agents on the physicochemical properties of powder, i.e., hygroscopicity, degree of caking, wettability, dispersibility, solubility, water absorption index, color, and...
Article
Date powder was produced without (control) and with carrier agents at three ripening stages of dates (khalal, rutab and tamr) by foam-mat freeze drying method. Maltodextrin (MD) DE 10 and gum arabic (GA) were used as carrier agents at two concentration levels (40% and 50%). The effect of carrier agents on flowability and microstructural properties...
Article
Full-text available
The use of treated grey water (GW) for home gardens, peri-urban agriculture and landscaping is becoming popular in many water stressed countries such as Oman. This study aims to investigate the treatment efficacy, health and chemical concerns, cost-benefits and maintenance protocol of a GW treatment system as well as the effect of irrigation with G...
Article
Full-text available
Arid climate and water scarcity are main hindering factors of crop cultivation in Oman. Arable land area is limited to 5.2% of total lands of 1.6 million ha, and which is fragmented to 150,000 land holdings and nearly 80% of them are small holdings limiting the efficient mechanization options. The 20% of large farms covers 29.4% of the arable land...
Article
Full-text available
Harsh weather conditions in Oman curbs open-field cultivation of high-value vegetable crops. Greenhouse cultivation presents a promising solution to overcome these conditions. This paper presents the status of controlled-environment agriculture in Oman and highlights the associated mechanization potentials. It was reported that greenhouse populatio...
Article
Full-text available
In this study, the potential of RGB color imaging to detect fungal contamination in three varieties (Khalas, Fard and Naghal) of dates was investigated. The samples were treated as three groups: UC (untreated control), SC (surface sterilized, rinsed and air-dried) and IS (surface sterilized, rinsed, air-dried and fungal inoculated). Color images of...
Conference Paper
Full-text available
This study presents a preliminary trial to evaluate the performance of greenhouse cropping systems in Oman using five performance indicators; land-use efficiency (LUE), water-use efficiency (WUE), irrigated-water-use efficiency (IWUE), gross-water-use efficiency (GWUE) and energy-use efficiency (EUE). Three cucumber greenhouses were chosen as case...
Article
Full-text available
This study presents a preliminary trial to evaluate the performance of greenhouse cropping systems in Oman using five performance indicators; land-use efficiency (LUE), water-use efficiency (WUE), irrigated-water-use efficiency (IWUE), gross-water-use efficiency (GWUE) and energy-use efficiency (EUE). Three cucumber greenhouses were chosen as case...
Presentation
Full-text available
This presentation was delivered in an American-Omani bilateral symposium to exchange ideas and explore potential research collaboration between experts from both countries.
Conference Paper
Full-text available
Seawater greenhouse is relatively a new agricultural engineering phenomenon that exhibits a promising solution for arid regions suffering from freshwater scarcity and harsh weather conditions. The concept of solar still distillation is integrated in a greenhouse structure in order to grow high value crops and simultaneously produce freshwater neces...
Article
This study aims at investigating the productivity and efficiency of a new system combining solar stills (SS) and a greenhouse evaporative-cooler to provide irrigation water demand for greenhouses in seawater-intruded areas. Galvanized-steel sheets were used to fabricate four solar stills with 1 m2 floor area and 23o inclined glass cover. Brackish w...
Conference Paper
Full-text available
Evaporative cooling techniques are widely used in arid regions for the sake of cooling the inner environment of tunnel-type greenhouses. The cooling effectiveness of evaporative coolers depends on several factors including cooler design parameters (e.g. material, surface area, height, width and thickness), weather conditions (e.g. air temperature a...
Conference Paper
Full-text available
Seawater greenhouse is a promising technology to desalinate seawater/brackish groundwater in an agricultural structure for the benefit of providing the greenhouse with its irrigation water demand. Currently, freshwater production is far below expectation and there is still an opportunity for improvement. Further research studies in the seawater gre...
Conference Paper
Full-text available
This article addresses a steady-state mathematical model developed to simulate the dehumidifier unit of the seawater greenhouse (SWGH) located in Oman. The simulation was based on the energy balance of the system. Experiments were conducted to generate two datasets; first dataset was used to develop an empirical relationship necessary to estimate f...
Article
Evaporative cooling devices are used extensively in greenhouses in arid countries to reduce excessive ambient temperatures for cultivating high value crops. Accordingly, predicting outlet air temperature and humidity from the greenhouse evaporative cooler is an essential step in determining greenhouse design and operating parameters, such as the pe...
Thesis
Full-text available
The humidification-dehumidification (HD) greenhouse is a relatively new technology. In addition to the humidification process and cultivation normally present in greenhouses in arid countries, the HD greenhouse also integrates a dehumidification process. In these greenhouses, saline or brackish water is evaporated in the ordinary evaporative coolin...
Article
This paper presents a pilot design for a humidification–dehumidification system in a Quonset greenhouse. The objective of this study was to investigate the potential of saline/brackish water evaporation and freshwater condensation to provide an alternative source of freshwater for irrigation in a greenhouse. Two humidifiers, each comprising a wall...
Conference Paper
Full-text available
Prolonged aridity in the Sultanate of Oman has resulted in freshwater deficit in some parts of the country. In coastal areas, the aridity coupled with over-pumping of groundwater have often resulted in seawater intrusion. Looking for alternatives to provide freshwater for domestic, industrial and agricultural purposes is an ultimate goal for the go...
Thesis
Full-text available
Prolonged aridity in the Sultanate has resulted in freshwater deficit in some parts of the country. In coastal areas, the aridity coupled with over-pumping of groundwater have often resulted in seawater intrusion. Looking for alternatives to provide freshwater for domestic, industrial and agricultural purposes is an ultimate goal for the government...

Questions

Questions (3)
Question
We are currently conducting pipe flow simulations in FLUENT but we know for sure that there will be condensation of water vapor taking place inside the pipe. How can we estimate the condensation rate? Is there a built-in tool in FLUENT enabling us to include condensation? Do we need to write our own User-defined-function?
Question
We are currently conducting pipe flow simulations in SolidWorks but we know for sure that there will be condensation of water vapor taking place inside the pipe. How can we estimate the condensation rate? Is there a built-in tool in SolidWorks enabling us to include condensation? Do we need to write our own User-defined-function?
Question
I am currently working in a project in which we are growing Mulberry. However, I couldn't find its crop coefficient (Kc) so that I can determine its water requirement. I looked at Kc tables in FAO-56 but with no help. Also, I searched a number of textbooks and electronic databases but with no help.
If there is no specific Kc value for Mulberry, what is the nearsest crop to Mulberry in terms of evapotranspiration?

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Projects (5)