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Barrier Longevity of NaCl-Laden Soil against Subterranean Termites in an Earth Embankment

Author

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  • Ying Li

    (College of Geomatics and Municipal Engineering, Zhejiang University of Water Resources and Electric Power, Hangzhou 310018, China)

  • Dong-Zi Pan

    (Zhejiang Institute of Hydraulics and Estuary, Hangzhou 310012, China)

Abstract

Subterranean termite-induced damage to earth embankments in agricultural systems occurs globally. NaCl-laden soil barriers (NLSBs) are an environmentally sustainable termite control method, and have exhibited good potential in preventing termite-related tunneling damage in Zhejiang Province, China. The persistence of the NaCl concentration in NLSBs is a key characteristic for the long-term prevention of subterranean termite infestations. This study is a scientific attempt to estimate the field efficacy and barrier longevity of NLSBs in reservoir embankments based on the Richards equation and the convection–dispersion equation using HYDRUS (2D/3D). The observed and simulated NaCl concentrations at the end of a 1915-day simulation were compared. The results indicated that the proposed model performed well and can effectively characterize the water flow and salt transport in NLSBs. The salt desalination rate of the NLSB in the upstream slope was higher than that in the downstream slope, both of which were significantly higher than that at the embankment axis. Regardless of the type of embankment (homogeneous or core-wall), the barrier longevity of NaCl-laden soil against subterranean termites can reach 50 years with an optimized NaCl/soil ratio in different parts of the embankment.

Suggested Citation

  • Ying Li & Dong-Zi Pan, 2021. "Barrier Longevity of NaCl-Laden Soil against Subterranean Termites in an Earth Embankment," Sustainability, MDPI, vol. 13(23), pages 1-16, December.
    • Handle: RePEc:gam:jsusta:v:13:y:2021:i:23:p:13360-:d:693706
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    References listed on IDEAS

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    1. Jasmina Defterdarović & Lana Filipović & Filip Kranjčec & Gabrijel Ondrašek & Diana Kikić & Alen Novosel & Ivan Mustać & Vedran Krevh & Ivan Magdić & Vedran Rubinić & Igor Bogunović & Ivan Dugan & Kre, 2021. "Determination of Soil Hydraulic Parameters and Evaluation of Water Dynamics and Nitrate Leaching in the Unsaturated Layered Zone: A Modeling Case Study in Central Croatia," Sustainability, MDPI, vol. 13(12), pages 1-20, June.
    2. Genxiang Feng & Zhanyu Zhang & Zemin Zhang, 2019. "Evaluating the Sustainable Use of Saline Water Irrigation on Soil Water-Salt Content and Grain Yield under Subsurface Drainage Condition," Sustainability, MDPI, vol. 11(22), pages 1-18, November.
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