The resource potential of in-situ shallow ground water use in irrigated agriculture: a review

Ayars, James E.; Christen, Evan; Soppe, Richard; Meyer, Wayne S.

doi:10.1007/s00271-005-0003-y

Cited by 144 publications

(69 citation statements)

References 42 publications

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“…Contribution of groundwater to crop evapotranspiration is negligible for a deep water table (e.g., 3 m) and irrigated conditions. This finding concurs with the conclusions of Ayars et al (2006). Using the Meyer equation (Wu et al, 1999), Ayars et al (2006) found that the maximum upward fluxes occur when the root zone is dry and groundwater table is shallow and the minimum upward fluxes occur when the root zone is wet, with either deep or shallow groundwater.…”

Section: Effects On the Water Usesupporting

confidence: 81%

“…This finding concurs with the conclusions of Ayars et al (2006). Using the Meyer equation (Wu et al, 1999), Ayars et al (2006) found that the maximum upward fluxes occur when the root zone is dry and groundwater table is shallow and the minimum upward fluxes occur when the root zone is wet, with either deep or shallow groundwater. Huo et al (2011) came to similar conclusions based on their lysimeter studies of the water use of wheat.…”

Section: Effects On the Water Usesupporting

confidence: 81%

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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

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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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Section: Effects On the Water Usesupporting

confidence: 81%

Section: Effects On the Water Usesupporting

confidence: 81%

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

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“…al. [1] while reviewing the feasibility of groundwater use in irrigated agriculture argued that SGW of good quality can be exploited and managed for crop water needs with the predominant factor of proper crop selection. Xu et.…”

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

confidence: 99%

“…The gap between water for environmental needs from the existing water resources. Worldwide, more than 40% of food production depends on supplements by irrigation waters [1]. In Pakistan, agriculture consumes more than 93% of good quality water [2,3].…”

Section: Introductionmentioning

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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“…Shallow groundwater has both positive and negative effects on agricultural land management. Specifically, capillary rise from groundwater can play an important role in contributing to the crop water use, which is very important in arid and semi-arid regions (Ayars et al, 2006;Jorenush and Sepaskhah, 2003). Shallow groundwater could be viewed as a potential water resource for crop use.…”

Section: Introductionmentioning

confidence: 99%

Evaluating the impact of groundwater on cotton growth and root zone water balance using Hydrus-1D coupled with a crop growth model

Han

Zhao

Šimůnek

et al. 2015

Agricultural Water Management

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a b s t r a c tGroundwater is an important factor that needs to be considered when evaluating the water balance of the soil-plant-atmosphere system and the sustainable development of arid oases. However, the impact of shallow groundwater on the root zone water balance and cotton growth is not fully understood. In this study, we have first analyzed the influence of the groundwater table depth on the seasonal maximum leaf area index of cotton, the average seasonal water stress, cotton yield, actual transpiration, actual evaporation, and capillary rise using experimental data collected at the Aksu water balance station, in Xinjiang, northwest of China and the Hydrus-1D variably-saturated soil water flow model coupled with a simplified crop growth model from SWAT. The coupled model has been first calibrated and validated using field observations of soil water content, leaf area index, cotton height, the above ground biomass, and cotton yield comparisons between measured and modeled variables have shown a reasonable agreement for all variables. Additionally, with a validated model, we have carried out numerical experiments from which we have concluded that groundwater is a major water resource for cotton growth in this region. The capillary rise from groundwater contributes almost 23% of crop transpiration when the average groundwater depth is 1.84 m, which is the most suitable groundwater depth for this experimental site. We have concluded that cotton growth and various components of the soil water balance are highly sensitive to the groundwater table level. Different positions of the groundwater table showed both positive and negative effects on cotton growth. Likewise, cotton growth has a significant impact on the capillary rise from groundwater. As a result, groundwater is a crucial factor that needs to be considered when evaluating agricultural land management in this arid region. The updated Hydrus-1D model developed in this study provides a powerful modeling tool for evaluating the effects of the groundwater table on local land management.

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The resource potential of in-situ shallow ground water use in irrigated agriculture: a review

Cited by 144 publications

References 42 publications

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)

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

Evaluating the impact of groundwater on cotton growth and root zone water balance using Hydrus-1D coupled with a crop growth model

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