CAPACITY ANALYSIS OF DRAINAGE CHANNELS ON PUBLIC ROADS IN FRONT OF THE SIDOARJO CLASS 1A RELIGIOUS COURT OFFICE: A REVIEW OF MAINTENANCE COSTS

INTERNATIONAL JOURNAL ON ADVANCED TECHNOLOGY, ENGINEERING, AND INFORMATION SYSTEM (IJATEIS) CAPACITY ANALYSIS OF DRAINAGE CHANNELS ON PUBLIC ROADS IN FRONT OF THE SIDOARJO CLASS 1A RELIGIOUS COURT OFFICE: A REVIEW OF MAINTENANCE COSTS Windya Yunesti Ernitasari1*, Budi Witjaksana2, Andi Patriadi3 1-3 Faculty of Engineering, Universitas 17 Agustus 1945, Surabaya E-mail: 1) , 2) , 3) Abstract Flooding in front of the Sidoarjo Class 1A Religious Court Office road happens frequently during the rainy season. It disrupts traffic and damages the roads. Flooding is caused by the condition of the drainage channels, which are not performing efficiently due to sediment barriers such as garbage, and some channels appear to be damaged. The existing channels can no longer accommodate the water discharge caused by the rain, thus water overflows from the drainage channels, flooding the main road. These conditions show the importance of handling drainage problems. One of the ways that can be taken is to evaluate the capacity of existing drainage channels. In this study, the evaluation of drainage channel capacity was carried out using the Hydrological and Hydraulics Analysis method. The purpose of this study to assess the suitability of the magnitude of the 5-year return period flood discharge with the capacity of the existing drainage channel, and to find a solution if the drainage system can no longer accommodate the magnitude of the proposed flood discharge. The chosen alternative was alternative 2 drainage channel rehabilitation with increased channel dimensions. Based on the calculated results, a channel dimension plan with a width of 0.6 m and a height of 0.80 m was necessary. The cost required for drainage channel rehabilitation was 750,605,179.00 rupiahs. Keywords: Drainage, Flood, Hydrological, Hydraulic 1. INTRODUCTION The Sidoarjo Class 1A Religious Court Office is a legal institution that plays a central role in the resolution of civil and family cases in the region. Located in a strategic location, the office is an important law enforcement center for the community. Wijaya Kusuma Sidoarjo Road in front of the office is not only a public traffic route, but also the main access for local residents to carry out various daily activities, including access to legal services, government and other social activities. Good connectivity through public roads supports the smooth and effective movement of visitors, judges, employees and other stakeholders who need smooth and safe access to the Sidoarjo Class 1A Religious Court Office. As such, the smooth running of public roads around the office has a direct impact on the efficiency of overall community activities. Floods in front of the Sidoarjo Religious Court Class 1A often occur when the rainy season comes. This condition causes traffic disruptions and damages to the road surface. The impact of floods on road performance includes significant traffic disruptions due to water puddles, resulting in traffic congestion and travel delays for road users. In addition, floods can also cause damage to road infrastructure, such as damaged roads and clogged drainage channels, all of which have an impact on the deterioration of road quality and IJATEIS | VOLUME 3 NO. 4 (2024) https://ojs.transpublika.com/index.php/IJATEIS/ E-ISSN: 2828-5425 487 CAPACITY ANALYSIS OF DRAINAGE CHANNELS ON PUBLIC ROADS IN FRONT OF THE SIDOARJO… Windya Yunesti Ernitasari, Budi Witjaksana, Andi Patriadi the comfort of road users. This infrastructure damage can also affect accessibility, limiting the movement of the community and increasing the risk of accidents on the highway due to dangerous road conditions (Yulius, 2018). The flood that occurred in the public road area in front of the Sidoarjo Class 1A Religious Court Office was caused by the ineffective condition of the drainage system, due to the presence of sediment blockages in the channels including trash, and some channels appeared to be damaged. The existing channels were no longer able to accommodate the water flow due to the rain, causing the water to overflow from the drainage channels, resulting in the main road being flooded. The condition highlights the importance of addressing drainage issues in the public road area in front of the Sidoarjo Class 1A Religious Court Office. One approach that can be taken is to conduct a capacity evaluation for each existing drainage channel. The flooding and puddling problems that occur in the public road area in front of the Sidoarjo Class 1A Religious Court Office can be overcome by redesigning the drainage channels according to the flood capacity in each segment of the channels (Guntoro et al., 2017). In this study, the evaluation of drainage capacity was carried out using the Hydrological and Hydraulics Analysis method. The purpose of this study is to determine the amount of storage capacity of the drainage channel, so that flooding can be resolved, analyze the suitability of the magnitude of the 5-year return period flood discharge with the capacity of the existing drainage channel and get a solution if the drainage system cannot accommodate the magnitude of the plan flood discharge. 2. LITERATURE REVIEW Drainage or also originates from the English word drainage, which means draining, disposing, or diverting. In the field of civil engineering, drainage is generally used to reduce excess water such as rainwater, seepage water, or excess irrigation water from an area/land, so that the function of the area/land is not disrupted (Juliana, 2019). In general, a drainage system can be defined as a collection of water structures designed to reduce and/or divert excess water from an area/land so that land utilization can be optimized. The drainage system can be defined as a series of water structures that function to reduce and/or dispose of excess water from a region/land, allowing the land to be optimally utilized. The sequential water structures of the drainage system, starting from the upstream, consist of interceptor drains, collector drains, conveyor drains, main drains, and receiving waters. Commonly encountered drainage structures include culverts, bridges, gutters, and sloping channels (Andana et al., 2016). Sediment in a river commonly mentioned as increasing the risk of flooding due (Patriadi et al., 2022). 2.1. Hydrological Analysis Hydrological analysis is an initial analysis related to the design of flood management systems and drainage system planning, determining the amount of runoff that will be carried so that the dimensions of the drainage channel can be determined (Linsley Jr et al., 1975). The flow rate used as a basic criterion in drainage planning, especially flood management, is the design flow rate, which is the amount of rain runoff planned for a certain return period and wastewater discharge from an area (Krisnayanti et al., 2017). The analysis is carried out by calculating the average rainfall of the flow area 488 IJATEIS | INTERNATI (...truncated)