Semidiscrete pesticide transport modeling and application

Chu, Xuefeng; Mariňo, Miguel A.

doi:10.1016/j.jhydrol.2003.07.004

Cited by 26 publications

(21 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Derived from the physically-based analytical model of Hantush and Mariño [38], the adopted mathematical model, with a new Windows-based interface (IPTM-CS), is a hybrid time-continuous and space-discrete semidiscrete model, which takes advantage of both analytical and numerical methods [27,37]. The model is able to deal with physical and biochemical processes related to one-dimensional vertical water flow and three-phase pesticide transport (dissolved, volatilized, adsorbed) in the vadose zone (separated in a root zone and in a deep vadose zone), where complete mixing is assumed.…”

Section: Methodsmentioning

confidence: 99%

“…The adoption of a semidiscrete solution allows the simulation for variably-saturated porous media with time-and space-variant parameters under conditions of heterogeneous media, unsteady flow fields, and space-time-dependent physical and biochemical processes concerning pesticide environmental fate. A complete description of the structure of the model and various solution methods are contained in [27,37]. The model has been used in previous studies with consistent results [27,39].…”

Section: Methodsmentioning

confidence: 99%

“…A complete description of the structure of the model and various solution methods are contained in [27,37]. The model has been used in previous studies with consistent results [27,39].…”

Section: Methodsmentioning

confidence: 99%

“…An easier way is represented by laboratory experiments [8][9][10][11][12], while a credible and diffused tool is the use of mathematical models to simulate the transport and fate process. Among the large number of transport models available [13][14][15][16][17][18][19][20][21][22][23][24][25][26], the integrated pesticide transport model (IPTM) developed by [27] is chosen for this study. Thus, this paper is an application of a well-tested and known pesticide transport model [27,28].…”

Section: Introductionmentioning

confidence: 99%

“…Among the large number of transport models available [13][14][15][16][17][18][19][20][21][22][23][24][25][26], the integrated pesticide transport model (IPTM) developed by [27] is chosen for this study. Thus, this paper is an application of a well-tested and known pesticide transport model [27,28].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Numerical Simulation of Pesticide Transport and Fate for Water Management in the Fucino Plain, Italy

Petitta¹,

Mariňo²

2010

JWARP

View full text Add to dashboard Cite

A three-phase pesticide transport model is used to verify by numerical simulation, the influence of different parameters on infiltration through soil and/or surface runoff processes. Simulations are performed for a typical sandy loam potato field of Italy's Fucino Plain, to explain the occurrence of measured concentrations of pesticides (mainly Linuron) in both surface waters and groundwater. Simulations take into account agricultural practices, climatic conditions, and soil characteristics. Results focus on the role of rainfall events and irrigation, of related infiltration amount and distribution, and of root zone thickness in influencing pesticide fate and its possible concentration increase through the years. Modeling results positively fit with the background knowledge of the Plain hydrology, showing the prevalence of surface transport and a scarce possibility for pesticides to reach groundwater in an average rainfall/irrigation scenario. Meanwhile, specific water management strategies are suggested to limit the occurrence of local groundwater pollution, related to high aquifer vulnerability zones, controlling inappropriate irrigation and pesticide application.

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

“…A complete description of the structure of the model and various solution methods are contained in [27,37]. The model has been used in previous studies with consistent results [27,39].…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Numerical Simulation of Pesticide Transport and Fate for Water Management in the Fucino Plain, Italy

Petitta¹,

Mariňo²

2010

JWARP

View full text Add to dashboard Cite

show abstract

Pesticide Occurrence and Distribution in Relation to Use

Chu

2004

Water Encyclopedia

View full text Add to dashboard Cite

Widespread use of a variety of pesticides has led to their occurrence in both surface and groundwaters. The occurrence and distribution of pesticides in the environment are closely related to their use and are determined by a series of pesticide transport and transformation processes. The occurrence and use of pesticides follow extremely complex and dynamic patterns that are affected by numerous factors related to pesticide properties, pesticide use, hydrology, and agricultural activities. The physical, chemical, and biological properties of pesticides affect their occurrence and distribution directly by altering their environmental persistence, mobility, and other fundamental transport processes. The way pesticides are used includes application amount, frequency, timing, and method has significant effects on pesticide occurrence and distribution. The quantity and frequency of application determine the overall exposure level of pesticides released into the environment, and the timing and method of application primarily change their environmental pathways and thus their occurrence as well as spatial and temporal distributions. Clearly, surface and groundwater systems have dissimilar patterns of pesticide use and occurrence due to their distinct hydrologic characteristics. The relationship of pesticide use and occurrence also varies with pesticide‐treated crops and agricultural management practices.

show abstract

Current awareness

2005

Hydrological Processes

View full text Add to dashboard Cite

Semidiscrete pesticide transport modeling and application

Cited by 26 publications

References 35 publications

Numerical Simulation of Pesticide Transport and Fate for Water Management in the Fucino Plain, Italy

Numerical Simulation of Pesticide Transport and Fate for Water Management in the Fucino Plain, Italy

Pesticide Occurrence and Distribution in Relation to Use

Current awareness

Contact Info

Product

Resources

About