One more approach, you can use some other method like ground penetrating radar and other remote sensing technique to look for medium to large leaks.
Published by Muhammad Alfalah Fauzi, CFD Engineer Intern at Institut für Wasserbau und Technische Hydromechanik (IWD) - TU Dresden
One more approach, you can use some other method like ground penetrating radar and other remote sensing technique to look for medium to large leaks.