The assessment of Urban Storm Inundation

International Conference on Eco Engineering Development 2017

生态环境科学

Setyandito, Oki^1 ; Wijayanti, Yureana^2 ; Alwan, Muhammad^3 ; Chayati, Cholilul^4 ; Meilani^1

Civil Engineering Department, Faculty of Engineering, Bina Nusantara University, Jakarta

11480, Indonesia^1

Agriculture Department, Faculty of Agriculture, Institute of Agriculture Stiper, Yogyakarta, Indonesia^2

Civil Engineering Department, Faculty of Engineering, University of Mataram, West Nusa Tenggara, Indonesia^3

Civil Engineering Department, Faculty of Engineering, Wiraraja University, Sumenep, Madura, Indonesia^4

关键词: Channel dimension;    Discharge calculation;    Drainage channels;    Indonesia;    Inundation;    Land-cover change;    Storm water runoff;    Stormwaters;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/109/1/012010/pdf
DOI  :  10.1088/1755-1315/109/1/012010

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

A Sustainable and integrated plan in order to solve urban storm inundation problem, is an urgent issue in Indonesia. A reliable and complete datasets of urban storm inundation area in Indonesia should become its basis to give clear description of inundation area for formulating the best solution. In this study, Statistics Indonesia data in thirty three provinces were assessed during 2000 until 2012 providing data series of urban flood area, flood frequency and land cover changes. Drainage system condition in big cities should be well understood to ensure its infrastructure condition and performance. If inundation occurred, it can be concluded that there is drainage system problem. Inundation data is also important for drainage system design process in the future. The study result is provided estimation of urban storm inundation area based on calculation of Statistics Indonesia data. Moreover, this study is preceded by analyzing and reviewing the capacity of existing drainage channel, using case study of Mataram, West Nusa Tenggara. Rainfall data was obtained from three rainfall stations surround Mataram City. The storm water quantity was calculated using three different approaches as follows: 1) Rational Method; 2) Summation of existing inundation and surface run off discharge; 3) Discharge calculation from existing channel dimensions. After that, the result of these approaches was compared. The storm water quantity gap was concluded as quantity of inundation. The result shows that 36% of drainage channel in Brenyok Kanan River sub system could not accommodate the storm water runoff in this area, which causing inundation. The redesign of drainage channel using design discharge from Rational Method approach should be performed. Within area with the lowest level topography, a construction of detention or storage pond is essential to prevent inundation in this area. Furthermore, the benefits and drawbacks of the statistics database are discussed. Recommendations include utilizing more refined urban land use typologies that can better represent physical alteration of hydrological pathways.