EVALUASI KINERJA JARINGAN DRAINASE PERKOTAAN KECAMATAN KALIANDA, LAMPUNG SELATAN

Abstract

Urban drainage systems are an important part of infrastructure for maintaining the socio-economic function of urban areas. The continued growth of the Kalianda subdistrict must be balanced with a good drainage system. This study aims to analyse the performance of the urban drainage network in Kalianda District, South Lampung Regency, in order to find appropriate solutions. Primary data was obtained through direct observation in the field to determine the existing condition of the drainage system. Ten years of rainfall data was obtained from BBWS Mesuji Sekampung. Spatial data was obtained from other sources. The analysis of planned flood discharge was based on the calculation of runoff discharge using the five-year return period Rational Method and domestic discharge from residents. The evaluation of drainage capacity was obtained from a comparison between planned discharge and existing drainage discharge. Existing discharge was calculated using the maning coefficient approach based on field observations. The analysis results show that the performance of drainage channels in Kalianda Subdistrict is 70 (seventy) out of 84 (eighty-four) drainage channel locations, or 84.33% of drainage channels are unable to withstand the flow discharge. Drainage channels in Kalianda Subdistrict require re-planning to adjust the planned discharge to be able to drain runoff water when it rains.