Effect of shallow groundwater table on crop water requirements and crop yields

Kahlown, Muhammad Akram; Ashraf, Muhammad; Zia-ul-Haq,

doi:10.1016/j.agwat.2005.01.005

Cited by 170 publications

(114 citation statements)

References 7 publications

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“…The actual distribution of groundwater depth was not used in this paper due to the lack of data. The optimum groundwater depth for one of the main crops in the area (1.5 m for winter wheat) (Kahlown et al 2005;Liu and Luo 2011) was set to be the depth at the initial simulation time, January 1, 1961.…”

Section: Parametersmentioning

confidence: 99%

Simulation of groundwater evaporation and groundwater depth using SWAT in the irrigation district with shallow water table

Liu

Luo

et al. 2015

Environ Earth Sci

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In irrigation districts with shallow water table, groundwater evaporation (ET gw ) and groundwater depth are important variables for the study of water balance. These variables are influenced by natural factors and human activity. In this study, a new method of simulating ET gw was used for SWAT, and the computing and output modules of groundwater depth were established. In addition, based on simulations, we analyzed the influences of irrigation schedules and soil types on ET gw and groundwater depth in the Irrigation Districts along the Lower Reach of Yellow River Basin. The applicabilities of the three methods (Hargreaves, Priestley-Taylor and PenmanMonteith) simulating potential evapotranspiration in SWAT 2000 were evaluated by the measured groundwater evaporation, and Hargreaves was applied in the simulation for irrigation district due to its smallest simulation error. The results presented that the mean groundwater depth decreased with the increase of irrigation amount. However, the changes of soil water storage in root zone and groundwater depth might have more complex effects on the variation of the mean groundwater evaporation. Loamy sand had the smallest annual mean groundwater depth and mean annual ET gw in the study area, while silt loam corresponded to the largest groundwater depth and groundwater evaporation. This study provides a new method for making simulations and analyses of the hydrological cycle in irrigation districts which has a shallow water table.

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Section: Parametersmentioning

confidence: 99%

Simulation of groundwater evaporation and groundwater depth using SWAT in the irrigation district with shallow water table

Liu

Luo

et al. 2015

Environ Earth Sci

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“…The quantification of upward fluxes from a shallow groundwater table is a significant topic that has been extensively researched (Ganiev, 1979;Zhang et al, 1999;Soppe and Ayars, 2003;Kahlown et al, 2005;Babajimopoulos et al, 2007;Yang et al, 2007;Huo et al, 2011). In the Fergana Valley, Ganiev (1979) studied over a period of four years the capillary rise from a shallow water table in lysimeter experiments under fallow and natural conditions, and cropped with cotton or alfalfa.…”

Section: Introductionmentioning

confidence: 99%

“…On a seasonal basis, 25% of the total crop water use originated from the groundwater. In the upper Indus basin near Lahore Pakistan, Kahlown et al (2005) investigated the effect of shallow groundwater tables on the crop water use via 18 large-size drainage-type concrete lysimeters. They found that when a groundwater table was kept at a depth of 0.5 m, the entire water use of wheat was supplied by groundwater.…”

Section: Introductionmentioning

confidence: 99%

Effects of the shallow water table on water use of winter wheat and ecosystem health: Implications for unlocking the potential of groundwater in the Fergana Valley (Central Asia)

Karimov

Šimůnek

Hanjra

et al. 2014

Agricultural Water Management

100

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a b s t r a c tThis paper analyzes the effect of the shallow water table on water use of the winter wheat (Triticum aestivum L.) that has replaced alfalfa (Medicago sativa) on the irrigated lands of the Fergana Valley, upstream of the Syrdarya River, in Central Asia. The effect of the shallow water table is investigated using HYDRUS-1D. Numerical simulations show that the contribution of the groundwater to evapotranspiration increases with a rising water table and decreases with increasing irrigation applications. Under irrigation conditions, an increase in the groundwater evapotranspiration is associated mainly with an increase in evaporation loss, causing a buildup of salinity in the crop root zone. Evaporation losses from fields planted with winter wheat after the harvest amount up to 45-47% of total evaporation thus affecting soil salinity and ecosystem health. Promoting the use of groundwater for irrigation in order to lower the groundwater table is suggested to achieve water savings from the change in the cropping pattern. Unlocking the potential of groundwater for irrigation in the Fergana Valley can also contribute toward managing soil salinity and improving the health and resilience of water, land and ecosystems of water, land and ecosystems (WLE).

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“…al. [13] found that the wheat and sunflower used 100 and 80% of their water consumption, respectively, through subsurface irrigation when WTD was maintained at 0.5 m. Liu and Luo [7] observed that the wheat used 65% of its WR from the groundwater if the WTD is maintained between 0.4-1.5 m; moreover, they also observed that the surface and subsurface water productivities are enhanced and these are proportional to decrease in WTD. Huo et.…”

Section: Sgw (Shallow Groundwater) Is An Important Resource Thatmentioning

confidence: 99%

Assessing the Effect of Different Water Table Depths on Water Use, Yield and Water Productivity of the Okra Crop

Gul¹,

Babar

Sarki

et al. 2018

Mehran Univ. res. j. eng. technol.

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An experimental study was carried out on a Lysimeter with the aim of partially meeting WRs (Water Requirements) of the Okra crop through SWT (Shallow Water Table) while maintaining the SWT at various levels below the ground surface. Under the study, CWR (Crop Water Requirement), yield, water productivity, salt accrual and contribution of SWTs towards meeting the CWR are assessed. The study was designed in accordance with the principles of CRD (Complete Randomized Design) with three treatments and four replications. The treatments; viz. T 1 , T 2 , and T 3 consisted of maintaining the WTDs (Water Table Depths) at 45, 60 and 75 cm, respectively, below the ground surface. The crop was irrigated with a good quality water having EC w = 0.50 dS m -1 and pH = 7.3. The results of the study showed that the crop consumed the maximum amount of water under T 1 treatment, followed by T 2 and then by T 3 treatment. Accordingly, the contribution of SWTs towards the CWR is 94.8, 93.2 and 42.9% of the total CWR under the T 1 , T 2 , and T 3 treatments, respectively. Maximum yield is attained under T 3 treatment, followed by T 2 treatment and then by T 1 treatment. Likewise, maximum water productivity is achieved under T 3 treatment, followed by T 2 treatment and then by T 1 treatment. The dry bulk density (ρ ρ ρ ρ ρ d ) of the soil, under T 1 and T 2 treatments, increased slightly; however, it remained unchanged under the T 3 treatment. The EC se (Electrical Conductivity) of the soil increased, whereas, the pH value of the soil decreased under all the treatments. Statistically, significant difference (p < 0.05) is observed in CWR, yield, water productivity, contribution of SWT towards crop water use, plant height and weight of the Okra pod; whereas, the difference in ρ ρ ρ ρ ρ d , EC se , pH and length of the pod is observed as not significant (p > 0.05) under the three treatments. Accordingly, to make profitable use of SWTs, improve WUE and productivity, and maintain soil fertility, the depth of SWT be controlled at 75 cm for growing of the Okra crop. Adapting to this guideline will help in availing the maximum contribution of SWTs towards meeting the CWR and achieve the larger aim of water conservation.

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Effect of shallow groundwater table on crop water requirements and crop yields

Cited by 170 publications

References 7 publications

Simulation of groundwater evaporation and groundwater depth using SWAT in the irrigation district with shallow water table

Simulation of groundwater evaporation and groundwater depth using SWAT in the irrigation district with shallow water table

Effects of the shallow water table on water use of winter wheat and ecosystem health: Implications for unlocking the potential of groundwater in the Fergana Valley (Central Asia)

Assessing the Effect of Different Water Table Depths on Water Use, Yield and Water Productivity of the Okra Crop

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