jwr-01-2020-01-05

Journal: Journal of Water Resources (JWR)
Author: Ritika Chopra

This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited

Doi:10.7508/jwr.01.2020.01.05

As a new remote sensing application direction of long-band radar satellites, satellite leakage detection technology is in the exploratory stage of application in the field of leakage control of urban pipeline networks. This paper summarizes and analyzes the application practice of satellite leakage detection in Shanghai Pudong area, and discusses the characteristics, advantages and limitations of satellite leakage detection. In terms of leak detection efficiency, through two applications of satellite leak detection technology, the number of leaks found per person per kilometer in ground manual leak detection has been greatly increased, which is more than 10 times more efficient than traditional manual inspection. Among the leaks detected by the two satellite leak detections, the proportion of road pipeline leaks and residential pipeline leaks was 30.8% and 69.2% respectively; in terms of diameter distribution, the proportion of small diameter (≤ DN50) pipelines detected leaks The proportion of leaks detected by large-diameter (>DN50) pipelines is 59.0%, and the proportion of leaks detected by large-diameter (>DN50) pipelines is 41.0%; the pipeline material has no significant effect on satellite leak detection, but the depth of burial has a greater impact on the detection of leaks. Compared with the manual inspection of leaks in the same period, the results show that satellite leak detection can significantly improve the efficiency of traditional leak detection, but the algorithm needs to be further optimized for the leak detection rate of large-diameter pipelines buried deep on the road.