Assessment of the water and mass balance in the landfill body by modelling using the example of the Dubna city landfill

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To predict the migration of pollutants in groundwater from the landfill site, it is necessary to know the infiltration rate and the concentration of pollutants in the moisture entering the groundwater level below the landfill. It is shown that the HELP program for calculating moisture transport in the unsaturated zone can be used to estimate the infiltration rate by the example of the municipal solid waste in Dubna, To estimate chloride ion concentration in the leachate entering the groundwater level, the VS2DT program for calculating the transport of pollutants with moisture in the unsaturated zone can be used. It is shown how uncertainty and insufficiency of information about the landfill site affects the estimation of these parameters, in what cases it is possible to use information about a similar dump, how test calculations help to verify hypotheses of formation of groundwater pollution under the landfill. The ranges of infiltration rate and chloride ion concentrations in moisture entering the groundwater level under the landfill body obtained as a result of calculations of the water and mass balance of the landfill in Dubna were further used to calculate the chloride ion transport in groundwater.

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作者简介

I. Pozdnyakova

Sergeev Institute of Environmental Geoscience, Russian Academy of Sciences

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Email: irina_pozd58@mail.ru
俄罗斯联邦, Ulanskii per., 13, bld. 2, Moscow, 101000

参考

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2. Fig. 1. Annual precipitation in Moscow over a 100-year period, mm.

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3. Fig. 2. Structure of the landfill body (option 2): 1 – sandy-clayey fill soil; 2 – waste; 3 – fill loam; 4 – moraine loam; 5 – groundwater level.

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4. Fig. 3. Calculated profile of the landfill body and results of water balance calculation (version 2).

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5. Fig. 4. Results of calculating daily precipitation (1) and infiltration (2) over 100 years (option 2).

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6. Fig. 5. Calculated profile and curves of chloride ion concentration in moisture in the central part of the landfill body at different points in time after landfill reclamation.

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