Evaluasi dan Rencana Pengembangan Sistem Drainase di Kecamatan Tegal Barat, Kota Tegal

Abstract

Flood is a condition of natural disaster phenomena that have a relationship with the amount of damage in terms of life and material. Floods start from population increases, climate change and land-use changes. Small drainage capacity and large amount of sediment in the drainage cause inundation/flooding. Other problems also arise from household wastewater. Dense urban areas cannot treat wastewater individually, so wastewater will be drained into urban drainage systems. In this study, rain played an important role in urban drainage evaluation and planning. The data needed is in the form of rainfall data, land use data and topographic data. The rainfall data used is the maximum daily rainfall data of the pahoman station with the comparison of other stations. Rainfall data were analyzed with Log Person III and Gumbel methods and then tested with Chi Square to select the statistical distribution received. Rainfall data is then applied in the intensity of rain hours with the mononobe method. The intensity of rain is useful for calculating peak discharge by rational methods. Based on data, flooding in several channels in West Tegal such as on Pineapple road, Rambutan road, Dolphin Dolphin road, Cinde road and Bawal. The evaluation carried out was in the form of analysis of the discharge of each drainage channel throughout the West Tegal region. After the evaluation, there are several drainage channels that need re-planning such as channels on Pineapple and Rambutan roads, cinde and Dolphin channels, and some drainage channels that need normalization such as the Bawal channel.