Operational dependability of water intake facilities

Operational dependability of water intake facilities means that all the elements provides execution of the specified functions for this intakes and water pre-treatment at operational level and in essential limits for any locality, town or industry. Questions about the reliability of water supply systems were taken and examined not only by Russian scientists (such as N. Abramov, L. Derushev, O.Primin, Y.Il'in, V. Makagonov, V. Malov) but foreign researches too (Howe Charles W., Smith Mark Griffin, Qi Yang, Sanchez-Torres G., Paul Jeffrey). The water intake facility is the first element in a water supply system, as a result it has to be very reliable. It influences on the common quality of the system.

Some essential factors have been analyzed. Each of them could have affect on the water intake facility. So we should divide them into two main categories: natural and technical. The first one depends on the type of the water structure with using water intake facility, for example, rivers, water chanels or reservoirs. Natural factors include presence or absence of biological deposits, sludges or something else. But technical factors have such properties as durability, storage characteristics and probability of survival.

It's very important to say that dependability of water intake facilities could directly subject to probabilistic laws of happening any events, that could lead to element failure or breaking down of the whole system.

Based on the ranging natural and technical factors the special tables were compiled. Now we can determine the most and the least service or repair availability of the water intake facility failure at some specified parameters. By the way, if we sum up all the values of influence natural and technical factors, we will find out which one of the water intake facility has depleted operational conditions. Besides, it is important to say that such technical factors as durability, storage characteristics and probability of survival have been described by the specific mathematical dependencies and in sum with natural factors they let us understand the whole picture of considered problem. (paper)