ORDINARY OPERATING CONDITIONS OF LARGE CHANNELS OF MOSCOW'S SEWERAGE NETWORK

The authors investigate large channels in Moscow's sewerage network. The analysis of dynamic properties of a sewer, as a component of the controlled system, is performed in terms of automatic control theory. The analytic relationship of channel "3 dB frequency" as a function of its morphometric and operating mode parameters is obtained. An analysis of frequency characteristics is conducted, assuming that the water flow in large sewers is quasistatic. The theoretical results are confirmed via flow depth variation curves surveyed in real situations of Moscow's sewerage network. Estimation of the maximal value of the rate of sewage depth change in sewers is performed by using graph-analytic techniques of applied spectral analysis. Results reveal that the amplitudes of the harmonic components of the sewage flow depth variations, greater than third, are no more than 10 percent of the value of the constant component. The authors conclude that the hypothesis regarding the quasistatic operating conditions in large channels is reasonable for any practical length of time. This greatly simplifies the mathematical model of a channel and leads to sewerage network controlling algorithms that are more convenient for realization.

Language

  • English

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  • Accession Number: 00724384
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Aug 5 1996 12:00AM