FUNDAMENTAL STUDY OF THE IMPACT OF BAROMETRIC PRESSURE VARIATION ON FORMATION OF FLOOD FLOW

Abstract

To evaluate the impact of barometric pressure variation caused by the upcoming super typhoon on the formation of flood flow is important to flood control planning. Thus, the physical phenomena based hydrologic model that combines barometric pressure variation, surface-water flow, ground-water flow is developed. Using this model, numerical experiment is conducted in which barometric pressure variation. The result shows that barometric pressure variation of 100hPa make the runoff height increase 1.3 times. The spatial distribution of barometric pressure variation led to two modes of river basin rain-runoff situation.