A review of models for predicting soil water dynamics during trickle irrigation

Subbaiah, R.

doi:10.1007/s00271-011-0309-x

Cited by 87 publications

(52 citation statements)

References 304 publications

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“…2). The irrigation schedule was based on the average reference evapotranspiration (ET 0 ) during the last 10 years at the site, multiplied by the crop coefficient (0.7) taken from Sluggett (2010). The cumulative crop evapotranspiration (ET C ) during the 29 day experimental period was equal to 65.3 mm, and daily ET C varied from 1.68 to 3.39 mm.…”

Section: Irrigationmentioning

confidence: 99%

“…An increasing use of nitrogenous fertilizers and their subsequent leaching as nitrate from the rootzone of cropping systems is recognised as a potential source of groundwater contamination, because the harvested crop seldom takes up more than 25-70% of the total applied fertilizer (Allison, 1996). Several researchers have reported substantial leaching (6-45%) of applied N under citrus cultivation in field conditions (Wang and Alva, 1996;Paramasivam et al, 2002;Sluggett, 2010). Similarly, in lysimeter experiments, Boaretto et al (2010) showed 36% recovery of applied nitrogen by orange trees, while Jiang and Xia (2008) reported N leaching of 70% of the initial N value, and found denitrification and leaching to be the main processes for the loss of N. These studies suggest that knowledge of the nitrogen balance in cropping systems is essential for designing and managing drip irrigation systems and achieving high efficiency of N fertilizer use, thereby limiting the export of this nutrient as a pollutant to downstream water systems.…”

Section: Introductionmentioning

confidence: 99%

“…Several models have been developed to simulate flow and transport processes, nutrient uptake and biological transformations of nutrients in the soil (Subbaiah, 2011). HYDRUS 2D/3D (Šimůnek et al, 2008, 2011) has been used extensively for evaluating the effects of soil hydraulic properties, soil layering, dripper discharge rates, irrigation frequency and quality, timing of nutrient applications on wetting patterns and solute distribution (e.g., Cote et al, 2003;Gärdenäs et al, 2005;Assouline et al, 2006;Hanson et al, 2006;Ajdary et al, 2007;Patel and Rajput, 2008;Šimůnek and Hopmans, 2009;Phogat et al, 2009Phogat et al, , 2010Phogat et al, , 2012Phogat et al, , 2013Li and Liu, 2011;Ramos et al, 2012) because it has the capability to analyse water flow and nutrient transport in multiple spatial dimensions (Cote et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of water movement and nitrate dynamics in a lysimeter planted with an orange tree

Phogat

Skewes

Cox

et al. 2013

Agricultural Water Management

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a b s t r a c tAdoption of high input irrigation management systems for South Australian horticultural crops seeks to provide greater control over timing of irrigation and fertilizer applications. The HYDRUS 2D/3D model was used to simulate water movement in the soil under an orange tree planted in a field lysimeter supplied with 68.6 mm of irrigation water over 29 days. Simulated volumetric water contents statistically matched those measured using a capacitance soil water probe. Statistical measures (MAE, RMSE, t cal ) indicating the correspondence between measured and simulated moisture content were within the acceptable range. The modelling efficiency (E) and the relative efficiency (RE) were in the satisfactory range, except RE at day 19. Simulated daily and cumulative drainage fluxes also matched measured values well. Cumulative drainage flux was 48.9% of applied water, indicating large water losses even under controlled water applications. High drainage losses were due to light texture of the soil and high rainfall (70 mm) during the experimental period. Simulated root water uptake was 40% of applied water.The calibrated HYDRUS model was also used to evaluate several scenarios involving nitrate fertigation. The numerical analysis of NO 3 -N dynamics showed that 25.5% of applied fertilizer was taken up by the orange tree within 15 days of fertigation commencement. The rest of the applied NO 3 -N (74.5%) remained in the soil, available for uptake, but was also vulnerable to leaching later in the growing season. The seasonal simulation revealed that NO 3 -N leaching accounted for 50.2% of nitrogen applied as fertilizer, and plant N recovery amounted to 42.1%. The scenario analysis further revealed that timing of a nitrogen application in an irrigation event had little impact on its uptake by citrus in the lysimeter. However, slightly higher NO 3 -N uptake efficiency occurred when fertigation was applied late in the daily irrigation schedule, or was spread out across all irrigation pulses, rather than being applied early or in the middle. Modelling also revealed that pulsing of irrigation had little impact on nitrate leaching and plant uptake. Applying less irrigation (50% or 75% of ET C ) resulted in higher nitrate uptake efficiency. This study showed that timing of water and fertilizer applications to an orange crop can be better regulated to enhance the efficiency of applied inputs under lysimeter conditions.

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Section: Irrigationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Evaluation of water movement and nitrate dynamics in a lysimeter planted with an orange tree

Phogat

Skewes

Cox

et al. 2013

Agricultural Water Management

View full text Add to dashboard Cite

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“…The soil properties include the texture, structure, and hydraulic conductivity, the existence of hardpan, the water table, and other variables (Pelletier & Tan, 1993); the irrigation application scheme includes the position of the equipment (on soil/in soil), the application rate and frequency, and the application method (drip/flood/ sprinkler). In addition to the studies that have monitored the wetting pattern (e.g., Souza & Matsura, 2003;Mirzaei et al, 2009;Samadianfard et al, 2012;Subbaiah, 2013), other studies have attempted to control or modify it. Phene et al (1987) indicated that the wetted pattern around a buried emitter could be managed by regulating the irrigation frequency; these authors demonstrated that increasing the irrigation frequency with reduced volume per application draws the water toward the soil surface.…”

Section: Introductionmentioning

confidence: 99%

The effects of three techniques that change the wetting patterns over subsurface drip-irrigated potatoes

Elnesr¹,

Alazba²

2015

Span. j. agric. res.

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Wetting pattern enhancement is one of the goals of irrigation designers and researchers. In this study, we addressed three techniques (dual-lateral drip, intermittent flow and physical barrier methods) that change the wetting pattern of subsurface drip irrigation. To study their effect on the yield and water-use efficiency (WUE) of potatoes, field experiments were conducted for four seasons, during which the soil-water balance was continuously monitored using a set of capacitance probes. The results of the soil water patterns showed that both the dual-lateral and intermittent techniques increased lateral water movement and eliminated deep percolation, whereas the physical barrier had a limited effect on the top soil layer. The crop results indicated that the yield and WUE increased significantly in response to the application of the dual-lateral drip (up to 30%); the intermittent application also positively affected the yield (~10%) and the WUE (~14%), but these effects were not statistically significant according to the statistical model. The physical barrier showed a non-significant negative effect on the yield and WUE. These findings suggest the following recommended practices: the use of dual-lateral drip technique due to its beneficial results and its potential for increasing yields and reducing water consumption; the application of intermittent flow with more than three surges; and restricting the use of physical barriers to soils with high permeability.Additional key words: intermittent application; subsurface drip irrigation; dual-lateral drip; physical barrier; water movement in the soil; Solanum tuberosum L.Abbreviations used: CWT (consumed water per tuber); DM (dry matter); H (dual later technique); LSD (least significant difference); P (physical barrier technique); S (intermittent application technique); SC (starch content); SG (specific gravity); WC (water content); WUE (water-use efficiency).Citation: Elnesr, M. N.; Alazba, A. A. (2015). The effects of three techniques that change the wetting patterns over subsurface drip-irrigated potatoes.

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“…Many scholars have conducted research on analytical solutions of the Richards equation. Some people gained steady analytical solutions in terms of one-dimensional steady vertical flux through soils [30][31][32]. Some people obtained quasi-linear approximation by transforming the Richards equation into a linear partial differential equation based on a linear hydraulic conductivity function or some special soil-water characteristic curves [33,34].…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation on Infiltration and Runoff in Unsaturated Soils with Unsteady Rainfall Intensity

Tan

Song

Zhang

et al. 2018

Water

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Abstract:Modeling infiltration into soil and runoff quantitative evaluations is very significant for hydrological applications. In this paper, a flow model of unsaturated soils was established. A computational process of soil water content and runoff prediction was presented that combines an analytical solution with numerical approaches. The solutions have good agreements with the experimental results and other infiltration solutions (Richards numerical solution and classical Green-Ampt solution). We analyzed the effects on cumulative infiltration and runoff under three conditions of rainfall intensity with same average magnitude. These rainfall conditions were (Case 1) decreasing rainfall, (Case 2) steady rainfall, and (Case 3) increasing rainfall, respectively. The results show that the cumulative infiltration in Case 1 is the highest among the three cases. The cumulative runoff under condition of Case 3 is smaller than that of decreasing rainfall at the initial stage, which then becomes larger at the later stage. The time of runoff under the conditions of Case 1 is earliest among the three rainfall conditions, which is about 50% earlier than Case 3. Therefore, project construction for urban flood control should pay more attention to urban flood defense in increasing rainfall weather than other rainfall intensities under the same average magnitude. The approaches presented can be utilized to easily and effectively evaluate infiltration and runoff as a theoretical foundation.

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A review of models for predicting soil water dynamics during trickle irrigation

Cited by 87 publications

References 304 publications

Evaluation of water movement and nitrate dynamics in a lysimeter planted with an orange tree

Evaluation of water movement and nitrate dynamics in a lysimeter planted with an orange tree

The effects of three techniques that change the wetting patterns over subsurface drip-irrigated potatoes

Numerical Investigation on Infiltration and Runoff in Unsaturated Soils with Unsteady Rainfall Intensity

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