Investigating the effect of spatiotemporal, wind speed and wind direction on precipitation magnitudes within urban area

Abstract

Abstract A number of documented precipitation changes are associated with the hydrological cycle, including changes in the magnitude of precipitation. Studying the effect of spatial, temporal, wind speed and wind direction on precipitation magnitude at specified points within Melbourne city - Australia could reveal how they affect precipitation magnitudes. To achieve this aim, a long rainy day was adopted to record the measurements at different places and times throughout the day and night. Study method involved measuring wind speed and direction at every measuring point by using a hand-held device, while precipitation values were recorded using the nearest ground weather station. The study revealed precipitation magnitudes at night were higher than during the daylight hours. On the other hand, fast winds increase precipitation magnitude, and wind direction has effect on precipitation either increase or decrease depending on upwind and leeward sides respectively. Respective to temporal parameter, precipitation magnitudes at night showed the highest. Wind speed directly effects precipitation values but the direction has a moderate effect on precipitation. Generally, spatiotemporal, wind speed and direction have distinct effect on precipitation with small time scale.