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IJSTR >> Volume 7 - Issue 2, February 2018 Edition



International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616



Study Of The Maximum Flood Discharge Capacity At The Sub Watershed Karang Mumus And Karang Asam In Samarinda City

[Full Text]

 

AUTHOR(S)

Yayuk Sri Sundari, Purwanto

 

KEYWORDS

biophysical conditions, flood prone area.

 

ABSTRACT

Biophysical conditions Karang Mumus Sub Watershed, Big Karang Asam and Small Karang Asam affect the characteristics of the flow hydrograph is important to note is the volume of water flow, flood discharge and the time until the maximum flood discharge. The shape of the Watershed slope geology and land cover types of soil are the physical characteristics that will affect the magnitude of the increase in the flow of surface water in response to rainfall. Changes in biophysical factors have a real impact on the volume of surface water flow increase, the maximum flood discharge, rainfall intensity and time. Predicting areas prone to flooding based on topographic maps and extensive inundation maps. The purpose of this study to determine the biophysical conditions and predict areas prone to flooding in the Sub Watershed and Sub Watershed Karang Mumus of the Big Karang Asam , and Small Karang Asam. Research methods to identify the biophysical conditions Karang Mumus , Big Karang Asam , and Small Karang Asam Sub Watershed and predicted a flood prone area in the Karang Mumus, Big Karang Asam and Small Karang Asam Sub Watershed. Results are expected to know the condition of the biophysical Karang Mumus, of the Big Karang Asam , and Small Karang Asam Sub Watershed and can be known capacities of river water, thus increasing the benefit / optimization function River. Conclusion Sub Watershed as a fan shape effect on the main River flood flow pattern is relatively large peak flow rate with the flood trip tributaries which simultaneously causes erosion and sedimentation in the estuary with the original host rock lithology form claystone, shale and sandstone smooth as well as the presence of land cover in the form of shrubs in the upper dense settlements downstream with stilt houses that impede the flow of water causing floods last longer. And flooding that occurred in the City of Samarinda during the rainy season the upstream Watershed with a steep slope conditions on topographic maps and extensive inundation maps that have the potential for very prone to flooding and inundation occurred in the subdistrict of the potential for very prone to flooding and inundation occurred in the subdistrict of North Samarinda.

 

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