Prof. Xiaoli DING, Director of the Research Institute for Land and Space and Chair Professor of Geomatics, has been awarded under the National Natural Science Foundation of China (NSFC) Key Programme 2023.
Project title:
Detection of underground water pipe leakage based on multi-temporal PolInSAR technology
Abstract:
Leakage from underground water pipes is a very common phenomenon internationally. According to statistics, water pipe leaks cause most cities to lose about 30% or more of freshwater resources, leading to huge resource and economic losses. The lack of effective water pipe leakage detection technology is one of the main reasons. Water supply pipelines are mainly buried below the ground surface. It is therefore difficult to detect pipeline leakage in time. Long-wave polarimetric SAR signals (such as L or P-band) are able to penetrate the ground surface and objects and can record subsurface water content information, which provides an important opportunity to solve the problem of water pipe leakage detection. However, research in this area is still very limited. For example, the relationship between polarimetric SAR signals and subsurface water content is still unclear. The influence of ground surface, buildings and vegetation on polarimetric SAR signals still needs further research. This project will conduct in-depth research on the use of polarimetric SAR for underground water pipe leakage detection, including 1) separating the scattering signals related to subsurface water from the polarimetric SAR signal; 2) establishing the relationship between the polarimetric SAR dielectric parameters and the leakage process 3) modeling the dielectric parameters of urban hardened surface and subsurface separately. The research will help to break through the technical bottleneck of underground water pipe leak detection and make an important contribution to saving precious freshwater resources.
Big congratulations to Prof. Ding!
Online coverage (Chinese only):
Ta Kung Pao - https://polyu.me/45WNVBt
Wen Wei Po - https://polyu.me/3PDxDHQ
| 研究部門 | 土地及空間研究院 |
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