The invention relates to the technical field of
water quality monitoring, and discloses a
sewage quality on-line monitoring method and
system.The
sewage quality on-line monitoring method comprises the steps that
time alignment processing and
data quality evaluation are conducted on original
water quality sequences collected at all monitoring point positions, and aligned data and
data quality weights are obtained; constructing a time
delay space diagram; performing joint
estimation on the global
water quality state to obtain global state
estimation and uncertainty; performing
anomaly detection and identifying an abnormal propagation path and a suspected source to obtain an anomaly
score and a source confidence sorting
list; formulating a self-adaptive sampling strategy, and determining the sampling frequency of each monitoring point position; on the basis of the time-
delay observation equation and weighted optimization, online joint
estimation of the global water quality hidden state is achieved, reverse
traceability is carried out by combining the residual
standardization anomaly
score and the time-
delay space diagram, the anomaly can be found, the possible source and propagation direction of the anomaly can be located, and the pertinence and
interpretability of disposal are improved.