PENGENDALIAN SEDIMENTASI DAN PENDANGKALAN SUNGAI PADA KAWASAN RAWAN BANJIR DI DESA SAWANGAN, DESA SELILING DAN DESA SUROTRUNAN KECAMATAN ALIAN KABUPATEN KEBUMEN

Hermawan, Ndendik (2017) PENGENDALIAN SEDIMENTASI DAN PENDANGKALAN SUNGAI PADA KAWASAN RAWAN BANJIR DI DESA SAWANGAN, DESA SELILING DAN DESA SUROTRUNAN KECAMATAN ALIAN KABUPATEN KEBUMEN. Other thesis, Universitas Pembangunan Nasional "Veteran" Yogyakarta.

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Abstract

Overflowing of several rivers in Kebumen Regency has caused flooding in
at least five villages in Kebumen Regancy. High intensity rain is the main factor
causing flooding. Other than rain intensity another factor causing flooding is the
decrease of river capacity due to the silting of the river due to the proses of
sedimentation. The purpose of this research is to predict the rate of sedimentation in
Kedungbener River and to know the factors and causes of flood in order to determine
the river management techniques in Kedungbener Sub DAS to reduce the level of
trivialisation of the river at the research site.
Determination of sediment sampling location is determined based on river
condition and flow pattern. Sediment sampling was performed using depth
integrating technique then laboratory analysis was done to determine sedimentation
rate calculated using some empirical formula (Meyer-Peter). One of the causes of
flooding is the rate of erosion can be predicted using MUSLE (Modification of
Universal Soil Loss Equation) method by direct observation of surface flow, soil
erodibility, slope, land use and land management which will then be calculated using
the formula. The extent of the distribution of areas affected by the floods can be
identified by field surveys and interviews of the communities in the study areas.
Determination of appropriate management directives for the control of
sedimentation and silting of the river is done by considering the condition of the
land, river condition and the rate of erosion and sedimentation at the study site.
The result of total discharge of sediment load in Kedungbener River is
50,61968 ton/day for floating sediment and 980,697 m3/day for basic sediment. The
occurrence of floods at the study site due to the silting of the river caused by the rate
of erosion in the study area with the result of 2.108,965 tons/year. Management
directives for the control of sedimentation and trivilisation of the river are done by
normalizing the river in the form of river dredging, the construction of sabo dam
and land conservation in the form of a bench terrace combined with a vegetation
filter.

Keywords : Flood, Sedimentation, Erosion, River Conservation

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Flood, Sedimentation, Erosion, River Conservation
Subjects:	T Technology > T Technology (General)
Divisions:	Faculty of Engineering, Science and Mathematics > School of Engineering Sciences
Depositing User:	Eko Yuli
Date Deposited:	19 Jan 2018 02:59
Last Modified:	07 May 2024 01:04
URI:	http://eprints.upnyk.ac.id/id/eprint/14274

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