1. Tape measure: A tape measure can be used to measure the height of the waterfall, especially if it is a small or medium-sized waterfall. The tape measure can be lowered down from the crest of the falls to the plunge pool, and the length of the tape measure that is submerged is the height of the waterfall.
2. Altimeter: An altimeter is a device that measures altitude, and it can be used to measure the height of the waterfall. The altimeter can be placed at the base of the waterfall and then hiked to the top, and the difference in the altimeter reading between the base and the top is the height of the waterfall.
3. Differential GPS: Differential GPS is a technique that uses two GPS receivers to obtain more accurate measurements of altitude. One GPS receiver is placed at the base of the waterfall and the other is placed at the top, and the difference in the GPS readings between the two receivers is the height of the waterfall.
4. Photogrammetry: Photogrammetry is a technique that uses photographs to measure the height of the waterfall. A series of photographs are taken of the waterfall from different angles, and then the photographs are used to create a three-dimensional model of the waterfall. The height of the waterfall can then be measured from the three-dimensional model.
5. Remote sensing: Remote sensing is a technique that uses satellite or aerial imagery to measure the height of the waterfall. The imagery is analyzed using computer software to create a three-dimensional model of the waterfall, and the height of the waterfall can then be measured from the three-dimensional model.
