EVALUASI DAN PERENCANAAN ULANG JARINGAN DRAINASE UNTUK PENANGGULANGAN BANJIR DI DESA KADEMANGAN KECAMATAN MOJOAGUNG KABUPATEN JOMBANG

Along with the development of community dynamics in the District of Mojoagung, especially in the area of Kademangan Village, it can cause flooding due to changes in land cover from paddy fields to residential areas, facilities and other infrastructure such as roads. This thesis aims to evaluate and plan drainage networks, existing planning drawings, Budget Plans, and project implementation schedules using the S curve method. In the implementation, the analysis of hydrology and hydraulics is carried out. Hydrological analysis is carried out with the aim of calculating the plan debit using a rational method and hydraulic analysis is carried out to calculate the capacity of the existing drainage channels. So that it can be known the location of the point of flooding that occurred and the new channel dimension planning. The results of the study with a 10-year return based on dispersion measurements obtained a suitable distribution is the Pearson Log Log Distribution III with planned debit values in each channel and most of the existing channels are not able to accommodate flood debit. Then re-planning is needed for a channel that cannot accommodate flood debit and the results of planning are drawing plans, the value of the Cost Budget Plan isRp.2,794,165,433.04, -, and planned project implementation schedule which is 12 weeks long.