Analysis the Influence of Hydrometeorological Disaster in Kera River Wajo Regency

Abstract

Abstract Recently, Indonesia has been dominated by hydrometeorological disasters which include landslides, tornadoes, droughts and floods. Hydrometeorological disasters cannot be separated from the consequences of climate change that occur. The purpose of this study is to examine the influence of climate change on hydrometeorological disasters in the Kera River of Wajo Regency. This research uses quantitative methods. The data used are primary data in the form of field surveys and secondary data in the form of river topographic data and TRMM rainfall. The climate change greatly affects the increase in rainfall in the watershed, and flooding in the Watershed. Changes in rain characteristics in the watershed, in the form of annual rain height and maximum daily rain tend to increase, resulting in flooding around the Kera River area. The highest discharge that occurs at 2 year return period is 147.1 m 3 /s, 5 year return period is 212.5 m 3 /s, 10 year return period is 251.3 m 3 /s, 25 year return period is 296.1 m 3 /s. Therefore, it is necessary to carry out flood disaster mitigation with structural methods shown, by normalizing rivers, building flood embankments respectively. The results of this study found that climate change that occurred in the Kera River had an effect on the number of hydrometeorological disaster events, especially floods.

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