METHOD OF DETECTING UNACCOUNTED INFLOWS IN WATER DISPOSAL SYSTEMS Russian patent published in 2021 - IPC E03B7/00 

FIELD: water disposal.

SUBSTANCE: invention relates to water disposal. Method consists in preliminary performance of a breakdown of the basin or the entire sewerage network, to which the subscribers' water outlets are connected, to m non-crossing areas. Breakdown is performed so that water outlets of any of the subscribers are connected to the water supply network of only one non-crossing area, and the number of water outlets from the non-crossing areas is minimum, mainly one. Presence of deviation features is recorded if observing exceeding the permissible values of the monitored parameter at the water outlet/outlets of the non-crossing areas. In addition, performing examination of non-crossing areas, in which there are signs of deviations, including determination and analysis of activities of subscribers, location, structural features of their buildings and structures, which indicate possible presence of deviation features and identify prospective subscribers. Check of controlled parameter for exceeding of maximum allowable values is performed only for prospective subscribers, waste water of which arrives to selected point located on outlet/outlets areas, in which presence of deviation features is registered. Hydraulic model of water disposal network is created, in which actual water consumption of subscribers is taken as initial data, hydraulic simulation is performed and determining the design flow rate variations in dry weather depending on the t time of the day. Actual wastewater flow rate is measured during k days at outlet/outlets of water of non-crossing areas and drainage basin, k ≥ 2. Minimum values of actual wastewater consumption are determined at outlet/outlets of water discharge basin in time intervals days, = 24 hours, n is number of intervals per day, i = 1, 2, … , n, , j = 1, 2, … , k, is actual consumption of waste water at outlet/outlets of water disposal basin in time interval on j^th day . Deviation factors of the water disposal basin are determined by dividing the values of minimum actual wastewater consumption by the calculated flow rate of waste water at each interval . Minimum values of actual consumption of waste water are determined at outlet / outlets of non-crossing areas in time interval Δt_i days, = 24 hours, n is number of intervals per day, i = 1, 2, … , n, h = 1, 2, … , m, , j = 1, 2, … , k, is actual consumption of waste water at outlet h in time interval on j^th day. Deviation coefficients of non-crossing areas are determined by dividing values of minimum actual wastewater consumption by values of estimated wastewater consumption at each interval . Average value of deviation coefficients of drainage basin and average value of deviation coefficients for each non-crossing area are determined. Controlled parameter is average value deviation of waste water consumption of non-crossing areas , as deviation indications, exceeding of average value of deviation coefficients of sewage water consumption of non-crossing area above average value of deviation coefficients of sewage waters of water disposal basin is accepted.

EFFECT: higher efficiency of detecting the presence of signs of deviations in the water disposal system.

1 cl, 11 dwg