Scholarly record
MATHEMATICAL MODELLING OF SALT SOLUTIONS FILTRATION AND OF MOISTURE TRANSFER IN SATURATED-NON-SATURATED SOIL MASS UNDER THE ACTION OF VERTICAL DRAINAGE
Abstract
The development of dangerous hydrogeological processes takes place as a result of the action of climatic factors and of unfavourable technogenic conditions. One of the reasons of the worsening quality of land resources is the salination of soils by chemical compounds (chlorides, sulphides, carbonates) from ground and surface waters and the non-rational irrigation which results in worsening useful properties of soil. With the aim of decreasing or avoiding soils salination hydro-ameliorative measures are used which include the creation of drainage systems through which the removal takes place of salt solutions from salinated soils. The construction of relevant mathematical models permits to adequately describe the hydrodynamics of the filtration of underground waters and moisture transfer for solving important problems of underground hydrodynamics. With this aim the mathematical modelling was carried out of the process of salt solutions filtration and of moisture transfer in saturated-non-saturated soil mass under the action of vertical drainage system in a two-dimensional case. The computing algorithm is built for solving the set boundary problem and its programmic implementation was realized. As a result of carrying out numeric experiments the dynamics was determined of the salt transfer process taking into account processes of salt solutions filtration and of moisture transfer in saturated-non-saturated soil under the action of the vertical drainage which is urgent in using drainage in the capacity of a drainage or irrigation element in hydroameliorative systems and with the aim of improving resources of fertile soils by way of discharging salt solutions and pollutions from soil medium.
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References7
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