[Main problems of drainage systems exploitation in Lithuania]
2002
Bastiene, N. (Lithuanian Inst. of Water Management, Vilainiai, Kedainiai reg. (Lithuania))
The efficient functioning of drainage objects depends on a number of accidental factors: natural and climatic conditions, the quality of drainage technologies and their exploitation, as well as the peculiarities of drained land use. Drainage reliability may be evaluated in view of the following indices: mean quantitative values, fluctuation peculiarities, interrelations and dependence of the indices. One of the indices, determining the reliability of drainage objects, is the drainage operation time to failure - the longer this time, the more reliable the drainage is from the point of view of exploitation. The paper deals with one of the most important reliability indices of drainage systems - it's operating time to failure. The indices of drainage functioning until its failure have been defined on the basis of probability theory and mathematical statistics. The distribution regularities have been established for the drainage object under different land-reclamation conditions. This might help to determine the failure probability, a certain age as well as to foresee the time and extent of repair works.
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