Measurement of drop size distribution rain in mataram utilize disdrometer acoustic for floods prediction

摘要

This paper present from result of research on prediction and made early warning system for occurrence of floods and landslides are frequently associated with high intensity rainfall and precipitation with a long duration in tropical climate. Raindrops the size of the large fall in the earth's surface even though in short duration or small fall long duration can be a big contributor for floods. Drop size distribution rain measured by acoustic disdrometer. The water level rises to the occurrence of rain varies greatly, according to the conditions of rain that fell in the direct measurement of water level in the river rises 0.01 per hours of the incident if stratiform. In convective the water level rise of 0.4 meters per hour in river downstream. Lognormal distribution model has an error rate condition or standard error fit small, amounting to 0,072 m-3mm-1. The path length of the Jangkok River is 47.1 km potential floods. Prediction floods can occur if the convective rains occur within the confines of more than 9 hours continuously.