The Effect of Urban Drainage on The Determination The Time of Storage In The City Development Area

Abstract

Increasing development activities in various fields in Surabaya will impact the occurrence of flooding, where the growth of residential buildings changes the function of the drainage area into runoff land. Therefore, there is a need for regional drainage recommendations. This study aims to provide a reference for a safe number that follows the storage needs and the duration of the peak partial drainage required by the region, following the study of water resources science. The data needed are rainfall data, average area, land function, and land slope maps. This study uses a 5-year return period probability. Moreover, the Nakayasu Hydrograph method is also used. It has a grace period starting from the rain surface to the top of the hydrograph, the area of the watershed, and the length of the main river channel. The comparison of the length of time of concentration (Tc) of the area with the length of waiting for time (Tp) of the urban drainage hydrograph shows that the area’s Tc value is greater than the Tp value of the urban drainage.

Pemanfaatan Kolam Tampung Sebagai Upaya Mitigasi Banjir Kawasan Pada Sub Sistem Medokan Ayu Kota Surabaya

“…Dimensi penampang serta kemiringan dasar saluran merupakan faktor fisiografi, pengaruh sebagian dari beberapa penyebab terjadinya banjir pada kawasan tersebut. Penyebab lain seperti perubahan tata guna lahan dari lahan kosong menjadi pemukiman padat yang mengakibatkan debit puncak naik karena sedikitnya air yang meresap kedalam tanah dan mengakibatkan aliran permukaan (run off) menjadi lebih besar [3]. Aliran permukaan yang besar ini menyebabkan kecepatan air menjadi destruktif sehingga terjadi longsoran dan sedimentasi [4].…”

Analysis of drainage network capacity in Rawa Jaya Area, Ilir Timur I, Palembang

“…This research was conducted to determine the volume of drainage discharge [5,6] and the planned flood discharge of the drainage channel at the Rawa Jaya location.. This research is expected to assist the authorities in dealing with flood inundation in this area.…”

Determination of Urban Drainage Distribution Based on Analysis of Catchment Area Characteristics

“…These Districts are District Gubeng, District Genteng, District Tandes, District Jambangan and District Wiyung (Setiawan & Lasminto, 2020). Each District has a different topographical slope with varying watershed characteristics (Imaadiiddiin et al, 2021). With the difference between watersheds, slopes and extent of development, effective regulatory policy is needed that is in accordance with the conditions in each District by reviewing the state of its topography.…”