Hole irrigation process simulation using a soil water dynamical model with parameter inversion method

Pan, Zhanpeng; Yu, Ting; Hou, Jingming; Zheng, Jian; Kang, Yongde; Wang, Yan; Cao, Changchong

doi:10.1016/j.agwat.2020.106542

Cited by 10 publications

(3 citation statements)

References 18 publications

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“…The primary reason was that compared with water/biogas slurry surface irrigation, hole irrigation could better promote root development, improve root surface area, facilitate the absorption of water and fertilizer, increase tomato yield and quality, and raise water use efficiency [35] .…”

Section: Discussionmentioning

confidence: 99%

Effects and evaluation of biogas slurry/water integrated irrigation technology on the growth, yield and quality of tomatoes

Zheng¹,

Qi²,

Yang³

et al. 2022

International Journal of Agricultural and Biological Engineering

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Reasonable techniques and methods in biogas slurry application are significant for the promotion of biogas slurry and the improvement of crop quality in agricultural production. To investigate the impacts of different biogas slurry application techniques on the water use efficiency, growth, yield, and quality of tomatoes, three irrigation techniques, and two application methods were considered in this study. The three irrigation techniques are alternate partial root-zone irrigation (APRI), fixed partial root-zone irrigation (FPRI), and two sides root-zone irrigation (TSRI). Two application methods refer to applying the biogas slurry with hole irrigation and surface irrigation. In addition, principal component analysis (PCA) and technique for order preference by similarity to ideal solution (TOPSIS) methods were adopted to evaluate the comprehensive quality and comprehensive indicators of tomatoes among different treatments. There are three hole irrigation treatments, T1 (APRI), T2 (TSRI), T3 (FPRI), and three surface irrigation treatments, T4 (APRI), T5 (TSRI), and T6 (FPRI) were set in two-season pot experiments. The results show that the plant height, dry matter accumulation, fruit yield, and water use efficiency present a similar descending trend for APRI, TSRI, and FPRI under the same methane irrigation method, yet show that the hole irrigation treatment was higher than the surface irrigation treatment for the same irrigation technique. These indicate that the coupling of APRI technique and hole irrigation is more conducive to the increase of plant production and water use efficiency. Meanwhile, T1 treatment can significantly improve the soluble sugar, sugar-acid ratio, VC content, soluble protein, soluble solid content, and firmness of tomato fruits, which are better for the taste, storage, and transportation of tomato fruit. The titratable acid content in tomato fruit is the highest in T2 treatment, followed by T5 treatment, indicating that TSRI technique may result in an accumulation of titratable acid and is not conducive to the taste of the tomato. The comprehensive nutritional quality and index evaluation results show that T1 treatment ranks the highest among all treatments, and can be used as an optimal irrigation method for the implementation of integrated water/biogas slurry.

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Section: Discussionmentioning

confidence: 99%

Effects and evaluation of biogas slurry/water integrated irrigation technology on the growth, yield and quality of tomatoes

Zheng¹,

Qi²,

Yang³

et al. 2022

International Journal of Agricultural and Biological Engineering

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“…and n are parameters depending on the pore size distribution, and 1 1/ mn =− . The values of each parameter in the model are obtained using the parameter inversion method (Pan et al, 2021).…”

Section: Collapse Risk Assessment Methodsmentioning

confidence: 99%

“…The infiltration law of loess is affected by soil properties and numerous initial conditions, including water head, infiltration time, and site location (Hou et al, 2016;Tu et al, 2009;Li et al, 2016). Pan et al (2021) utilized the Richards equation and parameter inversion approach to properly simulate the dynamic process of soil moisture change, with the aim of quantitatively analyzing the permeability characteristics of soil (Pan et al, 2021). Wang et al formulated an analytical model that establishes a connection between the collapsibility coefficient and several physical indicators of loess (Wang et al, 2021a).…”

Section: Introductionmentioning

confidence: 99%

Simulation and Evaluation of Collapsible Risk of Low Impact Development Rainwater System in Collapsible Loess Area

Jing,

Hou,

Pan

et al. 2024

Preprint

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To assess the risk levels of collapse for various low-impact development (LID) measures used in constructing stormwater systems in collapsible loess areas, the high-efficiency and high-precision urban stormwater model (GAST) was used to analyze the risk of waterlogging. Combined with the time of waterlogging accumulation, a method is proposed to assess the collapse risk level of various LID measures by considering the correlation between the collapsibility coefficient and soil parameters. This method was then used to analyze the changing patterns of settlement risk levels in grassed swales and rain gardens under different rainfall return periods (P1=20a, P2=50a, P3=100a) and water accumulation durations (T1=0.5 day, T2=5 day). The findings indicate a direct correlation between the rainfall return periods and the level of risk for collapse. At P3=100a, 50% of the collapse risk level in the study region reaches level III. Nevertheless, when the water accumulation duration is 5 days, the percentage of places classified as category III increases to 75%. Although rain gardens are better than grass swales at storing water, they also increase the risk of collapse. Therefore, it is essential to carefully monitor the durability of rain gardens during long periods of frequent rainfall. The evaluation approach proposed in this research demonstrates a 75% accuracy rate, confirming it as an initial and reliable instrument for evaluating the risk associated with building low-impact development stormwater systems in collapsible loess areas. Moreover, it can be employed to conduct additional investigations of the collapsibility impacts of LID measures in places with collapsible loess.

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High-efficiency and high-resolution numerical modeling for two-dimensional infiltration processes, accelerated by a graphics processing unit

Hou

Pan

et al. 2022

Hydrogeol J

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Hole irrigation process simulation using a soil water dynamical model with parameter inversion method

Cited by 10 publications

References 18 publications

Effects and evaluation of biogas slurry/water integrated irrigation technology on the growth, yield and quality of tomatoes

Effects and evaluation of biogas slurry/water integrated irrigation technology on the growth, yield and quality of tomatoes

Simulation and Evaluation of Collapsible Risk of Low Impact Development Rainwater System in Collapsible Loess Area

High-efficiency and high-resolution numerical modeling for two-dimensional infiltration processes, accelerated by a graphics processing unit

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