CHAPTER 13 - SPECIAL MEASUREMENT METHODS IN OPEN CHANNELS
Open channel flow measuring devices and methods described in chapters 6 through 10 are ones most commonly used for measuring irrigation water in the United States. Their relative simplicity makes them well suited for general use, and long experience has established their reliability. Tube-type flowmeters are installed in or at the end of pipes passing through embankments to laterals or ditches. Sometimes, these tubes are considered open channel measuring devices. Tube-type flowmeters are discussed in chapters 2, 11, and 14. Other specialized methods and devices for measuring water in open channels follow.