Study of Adequacy of Drainage Channels in Suburban Residential Areas

A Case Study of Residential Wirolegi Regency 2 Jember City, of Indonesia

Abstract

Wirolegi Regency 2 Housing is located on the outskirts of the city which is located in Pakusari District, Jember Regency, when there is quite heavy rain, puddles of water often occur, this is caused by environmental damage. The impact of environmental damage can be of various kinds, one of which is due to climate change. In the dry season, it can have an impact on drought and in the rainy season, it can have an impact on flooding. When there is high rainfall, it has the potential to cause flooding in the residential area. Another factor is the condition of the existing drainage channels which are inadequate and affect the occurrence of flooding in the housing area. On the basis of the above, it is necessary to conduct a research entitled "Study on Adequacy of Drainage Channels in Suburban Residential Areas". From the results of the study, it was concluded that the watershed in the residential area of ​​Wirolegi Regency II Jember has a watershed area of ​​148.75 km2. The value of rainfall intensity at the 5-year return period is 9.02 mm/hour, the design flood discharge value is 12131.7 m3/second, the runoff discharge value is 1473.8 m3/second, the total discharge is 157.280 m3/sec, dirty water discharge is 7.058 m3/second, total capacity discharge is 84.7 m3/second. For the drainage network, there are primary, secondary, and tertiary canals, totaling 3 outlets where all outlets lead to rivers. For channels that are not able to accommodate discharge, namely channels F, G, H, I, J, K, L, and M channels. For channels that require repairs, the dimensions of the channel are changed from 0.8 meters to 1 meter. It is recommended for each housing estate to pay attention to the discharge flowing in each channel by using a calculation formula that is in accordance with the conditions and criteria requirements of the formula and method used.