A statistical approach for estimating irrigation water usage in western Saudi Arabia

Rizaiza, Omar S. Abu; Al-Osaimy, Mahmoud H.

doi:10.1016/0378-3774(95)01194-3

Cited by 9 publications

(5 citation statements)

References 1 publication

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“…Chiew et al (1995) indicated that the BC equation gave similar ET 0 estimates as the FAO-56 PM method at 16 Australian locations with a wide range of climate conditions. Abu Rizaiza and Al-Osaimy (1996) indicated that irrigation water requirements for vegetables and perennial crops are close to the values estimated by the BC equation in the western region of Saudi Arabia. The results of another study showed that the Hargreaves and BC equations were the best ones for Davis in California and Jagdalpur in India with arid and humid climates, respectively (George et al 2002a, b).…”

Section: Introductionmentioning

confidence: 88%

Evaluation and calibration of Blaney–Criddle equation for estimating reference evapotranspiration in semiarid and arid regions

et al. 2014

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Penman-Monteith (FAO-56 PM) equation is suggested as the standard method for estimating evapotranspiration by the International Irrigation and Drainage Committee and FAO. On the other hand, the BlaneyCriddle (BC) temperature-based equation is an alternative and simple method compared with the FAO-56 PM equation. In the present study, the original coefficients BC equation (a and b) were calculated and calibrated spatial and temporal calibration at each station for each month based on the FAO-56 PM method for estimating reference evapotranspiration (ET 0 ) from 15 meteorological stations in central Iran (about 170,000 km 2 ) under semi-arid and arid conditions. The values of a and b in BC equation were negative and positive for all months of any station, respectively. Highest and lowest a values were obtained in December and August, respectively. December showed the lowest b values while August showed the highest. Therefore, the values of a and b were greater in cold and warm months of the year, respectively. After calibration, the root mean square error, mean bias error and percentage error values were obtained lower than 0.50, 0.015 mm day -1 and 10 % for the whole stations and months, respectively. The calibrated b values (b cal ) were proportional and inversely to the calibrated a values (a cal ). The ET 0 values based on the calibrated Blaney-Criddle equation were better than the results of the BC equation when compared to the FAO-56 PM equation as the reference model.

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Section: Introductionmentioning

confidence: 88%

Evaluation and calibration of Blaney–Criddle equation for estimating reference evapotranspiration in semiarid and arid regions

et al. 2014

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“…As an example, a reduction in the irrigation water of 30-40 % could be attained when sprinkler irrigation is used instead of traditional methods. An additional saving of 10-25 % can be reached with drip irrigation systems (Rizaiza and Al-Osaimy, 1996). Furthermore, implementation of recent innovative precision irrigation technologies, in conjunction with the accurate estimation of crop water requirements through remotely sensed data, could significantly enhance the efficient use of irrigation water in the agricultural sector.…”

Section: Introductionmentioning

confidence: 99%

Performance of the METRIC model in estimating evapotranspiration fluxes over an irrigated field in Saudi Arabia using Landsat-8 images

Madugundu

Al‐Gaadi

Tola

et al. 2017

Hydrol. Earth Syst. Sci.

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Abstract. Accurate estimation of evapotranspiration (ET) is essential for hydrological modeling and efficient crop water management in hyper-arid climates. In this study, we applied the METRIC algorithm on Landsat-8 images, acquired from June to October 2013, for the mapping of ET of a 50 ha center-pivot irrigated alfalfa field in the eastern region of Saudi Arabia. The METRIC-estimated energy balance components and ET were evaluated against the data provided by an eddy covariance (EC) flux tower installed in the field. Results indicated that the METRIC algorithm provided accurate ET estimates over the study area, with RMSE values of 0.13 and 4.15 mm d −1 . The METRIC algorithm was observed to perform better in full canopy conditions compared to partial canopy conditions. On average, the METRIC algorithm overestimated the hourly ET by 6.6 % in comparison to the EC measurements; however, the daily ET was underestimated by 4.2 %.

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“…Groundwater recharge and evapotranspiration from the meteorological data were calculated using a simple water balance method (Bonell et al , 1993) and a modified Penman method (Ayob et al , 2007) was assigned to the top layer. The modified Penman method has been successfully applied in evapotranspiration estimation in worldwide application (Lee et al , 2004; Abu Rizaiza and Al‐Osaimy, 1996). Recharge and evapotranspiration were found to vary with time and these were generally the larger factors influencing the transient behavior of the groundwater system.…”

Section: Methodsmentioning

confidence: 99%

Numerical simulation of seawater intrusion in Manukan Island, East Malaysia

Praveena

Abdullah

Aris

et al. 2011

Journal of Modelling in Management

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PurposeThis paper aims to define the current and potential extent of seawater intrusion in Manukan Island under different scenarios of varying recharge and pumping rates. The calibrated model was also used to predict the extent of seawater intrusion in low lying area of Manukan Island for two years with all conditions assumed to remain the same as those in December 2009.Design/methodology/approachDifferent scenarios of varying recharge and pumping rates based on threats received by Manukan Island were investigated. El‐Nino events and overpumping are represented by varying recharge and pumping rates. Simulation was done using SEAWAT‐2000, the latest modeling software available in groundwater modeling that couples flow and transport together.FindingsThe seawater‐freshwater mixing ratio moves landwards after two years of simulation in Scenario 1. In order to control overpumping in this study area, Scenario 2 has resulted in backward movement of the 1.4 percent seawater‐freshwater mixing ratio toward the coast after two years of prediction. The current contamination of the coastal aquifers by seawater intrusion will be more severe with an impact of El‐Nino events on groundwater resources depletion in Scenario 3. Reductions of pumping and recharge rates in Scenario 4 have worsened the seawater intrusion problem. With the aid of artificial recharge in Scenario 5, highest hydraulic heads and lowest chloride concentration were observed.Practical implicationsThe sustainable groundwater management selected for Manukan Island's current situation will be Scenario 2. In view of the effects of El‐Nino events in the future, Scenario 5 can be implemented to restore groundwater resources. The numerical model has showed the groundwater condition during El‐Nino events and overpumping illustrated that simulation modeling is an excellent tool to understand the behavior and management of an aquifer system. The output of simulation modeling via numerical model provides a framework toward groundwater management. Thus, current study output with similar approach which will restore groundwater (artificial recharge and reduction of pumping rate) can be applied in other small islands of similar hydrogeological condition and stresses for the purpose of groundwater resource protection.Originality/valueBriefly, these findings will effectively contribute to water policy analysis, planning and management in the study area to combat current as well as future seawater intrusion problem.

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A statistical approach for estimating irrigation water usage in western Saudi Arabia

Cited by 9 publications

References 1 publication

Evaluation and calibration of Blaney–Criddle equation for estimating reference evapotranspiration in semiarid and arid regions

Evaluation and calibration of Blaney–Criddle equation for estimating reference evapotranspiration in semiarid and arid regions

Performance of the METRIC model in estimating evapotranspiration fluxes over an irrigated field in Saudi Arabia using Landsat-8 images

Numerical simulation of seawater intrusion in Manukan Island, East Malaysia

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