Vol. 1, No. 2, pp. 83-87, September 2020 e-ISSN: 2775-5592 83 ECODRAINAGE SYSTEM EVALUATION AND CONTROL OF FLOODS IN JOMBANG DISTRICT, EAST JAVA Sri Rahmawati 1 , Anita Rahmawati 2 , Azizah Rachmawati 3 1 Graduate School of Civil Engineering Department, University of Islamic Malang, Malang, 65144, Indonesia 2,3 Civil Engineering Department, University of Islamic Malang, Malang, 65144, Indonesia e-mail: sri.rahma0117@gmail.com ABSTRACT Jombang sub-district is the most densely populated sub-district because it is located in the middle of Jombang district and is also the center of government. Because it is a densely populated area, resulting in many changes in land use, green land for absorption has turned into a watertight area. The results of the analysis from this aspect indicate that several channels in Jombang District are not able to accommodate the design flood discharge. The calculation of the height of rain design in this study used the Log Person type III method with a return period of 5 years, which resulted in the design rainfall of 157 mm. The results of the analysis show that there are 8 channels out of 74 that are unable to accommodate the design flood discharge. After planning the infiltration wells, a different number was obtained for each road. For Jalan Sentot Prawirodirjo, there are 8 infiltration wells with a reduction power of 51.62%. Keywords: ecodrainage, floods, infiltration wells 1. Introduction Flood is a form of natural phenomenon that occurs due to high rainfall intensity where there is excess water that is not accommodated by an area's drainage network. This condition has an impact on the emergence of inundation in the area which can harm the community [1]. Drainage is one of the basic facilities designed as a system to meet community needs and is an important component in urban planning (especially infrastructure planning). The urban drainage system is a component of urban infrastructure that is closely related to spatial planning. Flood disasters that often hit most regions and cities in Indonesia are caused by chaotic spatial planning [2]. 2. Material and Methods Planning was carried out in Jombang District, Jombang Regency. Starting from January 2019 to March 2019. The data used in this study are rainfall data for the last 10 years, research location data, drainage network maps, and existing drainage data. 2.1 Description ot the Research Location Jombang District is one of the sub districts located in Jombang Regency. The area of Jombang sub district is around 36,40 km 2 , divided into several parts of land including industry, factories, settlements and rice fields.