Measure H20 is the app that was created from the United States Bureau of Reclamations water measurement manual. The features included in this app cover proper flow measurement of water control structures such as Cipolleti Wiers, Rectangular Weirs, V-Notch 90 Weirs, Parshall Flumes and Submerged Orifices. There is also a Bucket and Stopwatch feature that will calculate flow for this simple method of water measurement. This mobile app has been developed by the Bureau of Reclamation.