[Hydro-geological estimations of allowable modes and volumes of water-selection at sharing superficial and underground waters]
Kovalevskij, V.S.(Institute for Problems of Natural Resources Use and Ecology, Minsk (Belarus)) | Cherepanskij, M.M. | Tomina, N.M.
Sharing of superficial and underground waters under condition of periodic work of the basic and additional water-fences allows to rise resource potential of territory and security of natural complexes from negative influence of the concentrated water-selection. The main principle of work of such system consists in use of underground waters for repayment of deficiencies of a superficial drain in the separate shallow periods. Thus completion of the stocks of underground waters reduced in the shallow period should occur in the subsequent abounding in water period. The satisfaction of these conditions is provided with calculation and the account of time of delay of display of damage to a river drain at water-selection of underground waters which depends first of all on a choice of a site of an additional water-fence, settlement hydro-geological parameters and boundary conditions of interrelation of superficial and underground waters. In this connection there is necessary a comparison of designed dynamics of damage to an actual hydrographer of a drain with the purpose of a choice of such site of an additional water-fence at which the period of display of damage to a drain would coincide with the abounding in water period of a drain or that possible damages to a drain in the critical periods when it is inevitable would not exceed 5...7% from the charge of the river. The example of concrete calculation of a hydrographer of a drain is carried out for the typical small river the Llama located in Moscow suburbs. The minimal monthly average charge of 95% of security makes 1.0m3/s. At the water-selection equal 0.6m3/s and accomodation of a water-fence on distance of 400m from the river the damage to a drain will begin to be shown only in 47.5day, i.e. all 13 day prior to the end of selection of water and will make at this time only 5% from water-selection
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