Reciprocal influence of crops and shallow ground water in sandy landscapes of the Inland Pampas

Nosetto, Marcelo D.; Jobbágy, Estéban G.; Jackson, Robert B.; Sznaider, Gustavo Arial

doi:10.1016/j.fcr.2009.04.016

Cited by 138 publications

(121 citation statements)

References 29 publications

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“…When surface water resource is insufficient, groundwater table can be maintained within a proper depth range; and will therefore contribute to the crop evapotranspiration, which reduces the irrigation amount (Ghamarnia and Golamian 2011). However, groundwater table will decline as a result of water consumption by the crops (Nosetto et al 2009). Frequent and heavy irrigation may, however, result in the lifting of groundwater table gradually and deteriorate waterlogging (Bandyopadhyay and Mallick 2003).…”

Section: Introductionmentioning

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: Introductionmentioning

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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“…al. [6] found that when the WTD ranged from 1.4-2.45, 1.2-2.2 and 0.7-1.65 m; the maize, soybean, and wheat crops resulted in maximum yield, respectively; they also concluded that crop yield decreases if the WTD is shallower than these limits. Zhu et.…”

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

confidence: 99%

“…al. [6]. There were significant differences (P < 0.05) in plant height and weight, and non-significant difference 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 under silty loam soils.…”

Section: Agronomical Parametersmentioning

confidence: 99%

“…al. [6] reported that, normally, the rise of the WT and its getting into the root-zone profile has adverse impacts on crop health and thereby on yield as well.…”

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

confidence: 99%

“…It's estimated area under cultivation is about 2.21x10 5 ha, yielding about 2.86x10 6 Tons of green pods annually [23];…”

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

confidence: 99%

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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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What does it take to flood the Pampas?: Lessons from a decade of strong hydrological fluctuations

Kuppel

Houspanossian

Nosetto

et al. 2015

Water Resources Research

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While most landscapes respond to extreme rainfalls with increased surface water outflows, very flat and poorly drained ones have little capacity to do this and their most common responses include (i) increased water storage leading to rising water tables and floods, (ii) increased evaporative water losses, and, after reaching high levels of storage, (iii) increased liquid water outflows. The relative importance of these pathways was explored in the extensive plains of the Argentine Pampas, where two significant flood episodes (denoted FE1 and FE2) occurred in 2000-2003 and 2012-2013. In two of the most flood-prone areas (Western and Lower Pampa, 60,000 km 2 each), surface water cover reached 31 and 19% during FE1 in each subregion, while FE2 covered up to 22 and 10%, respectively. From the spatiotemporal heterogeneity of the flood events, we distinguished slow floods lasting several years when the water table is brought to the surface following sustained precipitation excesses in groundwater-connected systems (Western Pampa), and ''fast'' floods triggered by surface water accumulation over the course of weeks to months, typical of poor surface-groundwater connectivity (Lower Pampa) or when exceptionally strong rainfalls overwhelm infiltration capacity. Because of these different hydrological responses, precipitation and evapotranspiration were strongly linked in the Lower Pampa only, while the connection between water fluxes and storage was limited to the Western Pampa. In both regions, evapotranspirative losses were strongly linked to flooded conditions as a regulatory feedback, while liquid water outflows remained negligible.

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Reciprocal influence of crops and shallow ground water in sandy landscapes of the Inland Pampas

Cited by 138 publications

References 29 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

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

What does it take to flood the Pampas?: Lessons from a decade of strong hydrological fluctuations

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