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VULNERABILITY ANALYSIS FLOODING IN RESIDENTIAL AREAS AT SUB RIVER WATERSHED BORANG, PALEMBANG CITY (CASE STUDY: SANGKURIANG INDAH RESIDENTIAL)

VULNERABILITY ANALYSIS FLOODING IN RESIDENTIAL AREAS AT SUB RIVER WATERSHED BORANG, PALEMBANG CITY (CASE STUDY: SANGKURIANG INDAH RESIDENTIAL)

1Ilmiaty R.S, 2Susanto R.H, 3Setiawan. B, 4Suryadi F.X, and 5Anggrayeni S.

1)Environmental Science Doctoral Program, Civil Engineering  Depertment, Feculty of Engineering , Sriwijaya University. Palembang -South Sumatra. Email: reini_mahyuddin@yahoo,co,id

2)Environmental Science Doctoral Program, Sriwijaya University. Palembang- South Sumantra. Email: robyanto@lowlands_info.org

3)Civil Engineering  Depertment, Faculty of Engineering  Sriwijaya University. Palembang -South Sumatra. Email: budhi@wgtt.org

4)IHE Delft, Delft, Netherlands. Email: f.suryadi@unsco-ihe.org

5) Civil Engineering  Depertment, Fuculty of Engineering, Sriwijaya University. Palembang-South Sumatra. Email: shepti.anggrayeni@yahoo.com

Abstract.  Natural disasters caused by climate change are largely hydro-meteorological disasters such as floods, droughts, flooding, and landslides. Macro-scale hazerd assessment needs to be studied further in the micro-scale to provide more detailed information about the flood vulnerability. Flood that occurred in Palembang are indicated  as one of the impacts of  land use for residential needs. Demand for residential continues Sangkuriang Indah Residential, which is located in District Sako, Sub River Watershed Borang. Research objectives were:  1). Identify residential  area,  2). Analyze the vulnerability of flooding in residential  areas, and 3). Design a model of vulnerability related with adaptation to climate change impacts, such as rainfall changing and sea level rise. Assessment methods in this study included three stages as follows: 1).  Vulnerability inventory data consisting of sensitivity factors, exposure, and adapted capacity, 2). Flood vulnerability  analysis using ILWIS program, and  3). Results and discussion. The modeling results were scenario inundation areas to have potential hazards abaut 72,923.4 M2 or 77.47%  of Sangkuriang Indah Residential total area (94,135.1  m2 ). The infrastructure Vulnerability index on any type of infrastructure will be different depending on indecators that exist on the type of infrastructure: the IVI is also affected by  the localtion of infrastructure. This study obtained that IVI maximum and minimum values for residential building were 0,434 and 0,244, respectively where the number of houses to have flood vulnerability level was 153 houses (moderate) and about 199 houses (low).

Keywords  : Vulnerability land use, residential, disaster, climate change

INTRODUCTION

Palembang is the most 20 vulnerable to climate change in Southeast Asia such Jakarta, Bandung, Surabaya, Bekasi, Bogor, Depok, Palembang, Tengerang, Lampung, and Jayawijaya (Yusuf et al. 2009). Palembang’s population is increasing each year affectiong housing growth and thus requirement for housing continues to increase. The conditing causes vulnerable wetlands converted its function. Some cases indicate if land use change occurred in a site, the rapid changes in the environment around the site happened.

                Land use is a significant change fields and settlements. The effect of land use on flood discharge is wetland and settlement then moor (Surose and Hery 2006). In South Sumatra, the utilization of natural resources and land use change are not well managed will result in the destruction of natural resources, the environment, thet it becomes vulnerable areas (Sorose et al. 2010).  THE POTENTIAL occurrence of floods, droughts, landslides and so have a risk to humans and other living creatures as a result or domage to natural resources and environmental phenomena such as global warming and climate change.