OceanAlpha Group Ltd. employed advanced geospatial technologies, including unmanned surface vehicles (USVs) equipped with side scan sonar, to detect illegal sewage pipes in a river section in Guangxi, China. The USVs successfully identified and mapped concealed sewage pipes, contributing to enhanced environmental management efforts. Real-time monitoring and data analysis facilitated proactive intervention, showcasing the effectiveness of geospatial solutions in safeguarding water quality and ecosystems.