The Unus Drainage System (UDS) is one of the drainage systems in the city of Mataram. Nowdays, this catchment area in the UDS has a fairly large and rapid change in land use, from agricultural land to housing, building shops, offices and...
moreThe Unus Drainage System (UDS) is one of the drainage systems in the city of Mataram. Nowdays, this catchment area in the UDS has a fairly large and rapid change in land use, from agricultural land to housing, building shops, offices and other buildings, so causing floods in several area. New construction and maintenance of drainage channels have been carried out by several agencies, both the City, Provincial, and Central Government, but the development are still partial or not comprehensive, so that many inundation problems become moved to other place and not resolved properly. For this reason, it is necessary to do zonation of the drainage network and its catchment area in order to facilitate the arrangement of drainage network. The objectives of this study are to find out the drainage network and catchment area of each drainage channel, so that the mapping can be made, and to evaluate the drainage channels capacity or the ability of the drainage channels to accommodate runoff. The conclusions of research are the results of mapping or zonation of the UDS are divided into 20 Primary Drainage Blocks in the Right UDS and 10 Primary Drainage Blocks in the Left UDS, the capacity evaluation of the existing drainage channel in this system is that most primary channels are still able to accommodate flood discharge, except the Sekarbela, Asrama Gebang, and Abian Tubuh Mayura primary channel. With zonation and evaluation the capacity of this drainage channel, planning for the development and maintenance of drainage system can be integrated and comprehensive, so that flood control can be better in accordance with its priorities.
