GEOL 1 Lecture Notes - Lecture 22: Stream Gauge, Hydrograph, Computer Monitor
Document Summary
Throughout history, the deadliest and most common natural disaster. Example: floods in china in 1931 killed an estimated 2. 5 to 3. 7 million. This is the natural disaster you are most likely to encounter. If you come to a flooded road when you are driving, simply remember to turn around and don"t drown. I think i know but i"ll still fail the test. Water where there is usually none, zero, 0, zip, nada. When discharge (q) is too much to be contained in the channel. Elevation of the stream surface above the bed (stage) exceeds the banks or size of the channel. In the united states, this is performed by the u. s. geological survey"s stream gage stations. Flood hydrograph nearest the rainfall area is highest and narrowest. At b, the flood hydrograph crests at a lower level but lasts longer. At c, the flood crests at an even lower level and lasts longer. Flash flood [in the middle of a valley]
