Method for analyzing groundwater infiltration amount of sewage pipe network
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A sewage pipe network and analysis method technology, applied in the direction of testing water, measuring devices, measuring flow/mass flow, etc., can solve the problems of large error, difficult construction, high detection cost, etc., achieve small error, low detection cost, and improve operation The effect of potency
Inactive Publication Date: 2018-11-23
天津格瑞安环保科技有限公司
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[0004] The purpose of the present invention is to overcome the deficiencies in the prior art, and to provide a method for analyzing groundwater infiltration in sewage pipe networks based on the chemical mass balance method, using a stable metal ion as the water quality characteristic factor of groundwater, and combining the Network geographic information system and the minimum flow at night to analyze the groundwater infiltration of the sewage pipe section, in order to solve the problem of high cost, difficult construction and large error of section-by-section geophysical prospecting or water quality characteristic factor detection
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Embodiment 1
[0034] In this embodiment, by detecting the water quality and flow rate of two transfer wells, the analysis results of the actual measurement and calculation of the groundwater in the sewage pipe section to be monitored are obtained. After comparison, the error of the groundwater infiltration volume analyzed by the invention is small, and the application It is reliable in practical engineering.
[0035] Nodes J1 and J2 are two transfer wells on the sewage pipe section to be monitored (that is, no domestic sewage flows into the pipe section), and the flow and water quality of J1 and J2 are monitored synchronously:
[0036] Actual seepage amount Q: The actual seepage amount of groundwater in this pipe section is taken as the difference between the monitored flow rates of the two transfer wells:
[0037] Q real=Q2—Q1 (2)
[0038] Where: Q1 is the monitoring flow of J1, and Q2 is the monitoring flow of J2.
[0039] Calculate the amount of leakage Q meter: take amg / L as the avera...
Embodiment 2
[0044] The positions of nodes N1, N2, N3, N4, N5 and pipe sections C1, C2, C3, C4, C5 in the sewage pipe network are as attached figure 2 As shown, the flow water quality monitoring results of each node are shown in Table 1 below.
[0045] Table 1
[0046]
[0047] From the nighttime flow monitoring results, it can be seen that there is groundwater infiltration in pipe sections 1, 2, and 3, and there is no groundwater infiltration in pipe sections 4 and 5. From the characteristic ion concentration detected at each node, it can be seen that the groundwater infiltration of pipe sections 1, 2, and 3 are 150.36m 3 / d, 55.34m 3 / d, 5491.02m 3 / d.
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Abstract
The invention discloses a method for analyzing the groundwater infiltration amount of a sewage pipe network. The method includes the steps that groundwater in a service area of the sewage pipe networksystem in a monitoring area is taken and subjected to water quality characteristic factor concentration detection, and the water quality characteristic factor concentration of the groundwater in themonitoring area is amg/L; an upstream node and downstream node of any one sewage pipe segment to be monitored in the monitoring area are labeled as a JA and a JB respectively; flowmeters and automaticsamplers are installed at the JA and the JB respectively; sampling and water quality detection are separately carried out on the JA and the JB through the automatic samplers every half an hour, and water quality characteristic factors are detected as XA and XB respectively; corresponding instantaneous flow rates of the JA and JB which are obtained during sampling time according to monitoring dataof the flowmeters are QA and QB respectively; the groundwater infiltration amount Q of the sewage pipe segment to be monitored is calculated. The method adopts stable metal ions as the water qualitycharacteristic factors of the groundwater and solves the problems that the cost for segmental geophysical prospecting or detection of the water quality characteristic factors is high, the constructionis difficult, and there are large errors.
Description
technical field [0001] The invention relates to the field of sewage treatment, in particular to a method for analyzing groundwater infiltration in a sewage pipe network. Background technique [0002] In areas with high groundwater levels, the groundwater infiltration caused by the damage of the sewage pipe network will not only increase the operating cost of the sewage treatment plant, reduce the treatment efficiency, and even occupy the system capacity of the sewage pipe network, affecting the transmission efficiency of the pipe network system. Therefore, it is very important to improve the operational efficiency of the sewage pipe network system by analyzing the groundwater infiltration of the urban sewage pipe network to determine the damaged location of the sewage pipe network, and then to take pipeline repair measures. [0003] At present, in the process of analyzing and evaluating the groundwater infiltration of sewage pipe network, the night minimum flow method is the...
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