Modeling for conjunctive use irrigation planning in sodic groundwater areas

Kaledhonkar, M. J.; Sharma, D.R.; Tyagi, Nidhi; Kumar, Ashwani; Zee, S.E.A.T.M. van der

doi:10.1016/j.agwat.2011.12.023

Cited by 20 publications

(11 citation statements)

References 15 publications

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“…The UnsatChem modules (especially its 1D version) has been used in many applications as exemplified by Kaledhonkar and Keshari (2006), Kaledhonkar et al (2006, 2012), Schoups et al (2006), Skaggs et al (2004), Corwin et al (2007), and Rasouli et al (2013), among others. Gonçalves et al (2006) and Ramos et al (2011, 2012) demonstrated the applicability of these modules to simulating multicomponent major ion transport in soil lysimeters irrigated with waters of different quality.…”

Section: Selected Hydrus Applicationsmentioning

confidence: 99%

Recent Developments and Applications of the HYDRUS Computer Software Packages

Šimůnek

Genuchten

Šejna³

2016

Vadose Zone Journal

748

336

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The HYDRUS-1D and HYDRUS (2D/3D) computer software packages are widely used finite-element models for simulating the one-and two-or three-dimensional movement of water, heat, and multiple solutes in variably saturated media, respectively. In 2008, Šimůnek et al. (2008b) described the entire history of the development of the various HYDRUS programs and related models and tools such as STANMOD, RETC, ROSETTA, UNSODA, UNSATCHEM, HP1, and others. The objective of this manuscript is to review selected capabilities of HYDRUS that have been implemented since 2008. Our review is not limited to listing additional processes that were implemented in the standard computational modules, but also describes many new standard and nonstandard specialized add-on modules that significantly expanded the capabilities of the two software packages. We also review additional capabilities that have been incorporated into the graphical user interface (GUI) that supports the use of HYDRUS (2D/3D). Another objective of this manuscript is to review selected applications of the HYDRUS models such as evaluation of various irrigation schemes, evaluation of the effects of plant water uptake on groundwater recharge, assessing the transport of particle-like substances in the subsurface, and using the models in conjunction with various geophysical methods.Abbreviations: CRS, cosmic-ray sensing; EC, electrical conductivity; ERT, electrical resistivity tomography; FEM, finite element mesh; GPR, ground-penetrating radar; GUI, graphical user interface; TDT, time-domain transmissometry.The HYDRUS-1D and HYDRUS (2D/3D) software packages (Šimůnek et al., 2008b) are finite-element models for simulating the one-and two-or three-dimensional movement of water, heat, and multiple solutes in variably saturated media, respectively. The standard versions, as well as various specialized add-on modules, of the HYDRUS programs numerically solve the Richards equation for saturated-unsaturated water flow and convection-dispersion type equations for heat and solute transport. The flow equation incorporates a sink term to account for water uptake by plant roots as a function of water and salinity stress. Both compensated and uncompensated water uptake by roots can be considered. The heat transport equation considers movement by both conduction and convection with flowing water. The governing convection-dispersion solute transport equations are written in a relatively general form by including provisions for nonlinear, nonequilibrium reactions between the solid and liquid phases and linear equilibrium reactions between the liquid and gaseous phases. The transport models also account for convection and dispersion in the liquid phase as well as diffusion in the gas phase, thus permitting the models to simulate solute transport simultaneously in both the liquid and gaseous phases. Hence, both adsorbed and volatile solutes, such as pesticides and fumigants, can be considered.The solute transport equations further incorporate the effects of zero-order production, first-o...

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Section: Selected Hydrus Applicationsmentioning

confidence: 99%

Recent Developments and Applications of the HYDRUS Computer Software Packages

Šimůnek

Genuchten

Šejna³

2016

Vadose Zone Journal

748

336

View full text Add to dashboard Cite

show abstract

“…UNSATCHEM is a transient flow and transport model that considers the effects of many variables and factors, such as the initial soil salinity, time and amount of rainfall, water quality, and blending of saline and fresh waters (Bradford and Letey 1992;Kaledhonkar and Keshari 2006;Gonçalves et al 2006;Ramos et al 2011Ramos et al , 2012Kaledhonkar et al 2012). The UNSATCHEM model can additionally account for chemical reactions, such as aqueous complexation, cation exchange, and salts precipitation and/or dissolution, which are important for assessing the effects of the quality of irrigation water in arid and semiarid regions.…”

Section: Introductionmentioning

confidence: 99%

Modeling the effects of saline water use in wheat-cultivated lands using the UNSATCHEM model

2012

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Waters of poor quality are often used to irrigate crops in arid and semiarid regions, including the Fars Province of southwest Iran. The UNSATCHEM model was first calibrated and validated using field data that were collected to evaluate the use of saline water for the wheat crop. The calibrated and validated model was then employed to study different aspects of the salinization process and the impact of rainfall. The effects of irrigation water quality on the salinization process were evaluated using model simulations, in which irrigation waters of different salinity were used. The salinization process under different practices of conjunctive water use was also studied using simulations. Different practices were evaluated and ranked on the basis of temporal changes in rootzone salinity, which were compared with respect to the sensitivity of wheat to salinity. This ranking was then verified using published field studies evaluating wheat yield data for different practices of conjunctive water use. Next, the effects of the water application rate on the soil salt balance were studied using the UNSATCHEM simulations. The salt balance was affected by the quantity of applied irrigation water and precipitation/dissolution reactions. The results suggested that the less irrigation water is used, the more salts (calcite and gypsum) precipitate from the soil solution. Finally, the model was used to evaluate how the electrical conductivity of irrigation water affects the wheat production while taking into account annual rainfall and its distribution throughout the year. The maximum salinity of the irrigation water supply, which can be safely used in the long term (33 years) without impairing the wheat production, was determined to be 6 dS m -1 . Rainfall distribution also plays a major role in determining seasonal soil salinity of the root zone. Winter-concentrated rainfall is more effective in reducing salinity than a similar amount of rainfall distributed throughout autumn, winter, and spring seasons.

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“…precipitation-dissolution, cation exchange, complexation) (UNSATCHEM, HYDRUS), their application typically is limited to small field-scale or soil-profile domains (e.g. Kaledhonkar and Keshari, 2006;Schoups et al, 2006;Kaledhonkar et al, 2012;Rasouli et al, 2013). Conversely, models such as SAHYSMOD and MT3DMS have been applied to regional-scale problems, but lack the reaction chemistry and treat salinity as a conservative solute.…”

Section: Introductionmentioning

confidence: 99%

A Salinity Module for SWAT to Simulate Salt Ion Fate and Transport at the Watershed Scale

Bailey¹,

Tavakoli-Kivi²,

Wei³

2019

Preprint

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Abstract. Salinity is one of the most common water quality threats in river basins and irrigated regions worldwide. However, no available numerical models simulate all major processes affecting salt ion fate and transport at the watershed scale. This study presents a new salinity module for the SWAT model that simulates the fate and transport of 8 major salt ions (SO4, Ca, Mg, Na, K, Cl, CO3, HCO3) in a watershed system. The module accounts for salt transport in surface runoff, soil percolation, lateral flow, groundwater, and streams, and equilibrium chemistry reactions in soil layers and the aquifer. The module consists of several new subroutines that are imbedded within the SWAT modelling code and one input file containing soil salinity and aquifer salinity data for the watershed. The model is applied to a 732 km2 salinity-impaired irrigated region within the Arkansas River Valley in southeastern Colorado, and tested against root zone soil salinity, groundwater salt ion concentration, groundwater salt loadings to the river network, and in-stream salt ion concentration. The model can be a useful tool in simulating baseline salinity transport and investigating salinity best management practices in watersheds of varying spatial scales worldwide.

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Modeling for conjunctive use irrigation planning in sodic groundwater areas

Cited by 20 publications

References 15 publications

Recent Developments and Applications of the HYDRUS Computer Software Packages

Recent Developments and Applications of the HYDRUS Computer Software Packages

Modeling the effects of saline water use in wheat-cultivated lands using the UNSATCHEM model

A Salinity Module for SWAT to Simulate Salt Ion Fate and Transport at the Watershed Scale

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