CCTV and Sonar Surveys are carried out to assess the condition and identify potential problems in underground drainage systems. It involves the use of cameras mounted on robotic devices that are sent through the pipes to capture real-time video footage, allowing inspectors to visually inspect and identify blockages, leaks, or other issues.

 

The survey aid in maintenance planning, identifying necessary repairs, and improving the overall performance of the drainage system.

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閉路電視和聲納調查是為了評估地下排水系統的狀況並確定潛在的問題。這涉及使用安裝在機器設備上的攝像機，通過管道拍攝實時影片，使檢查人員能夠目視檢查並識別堵塞、滲漏或其他問題。

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這種調查有助於維護計劃、識別必要的維修，以及提高排水系統的整體性能。