UPAYA MENGURANGI ANGKUTAN SEDIMEN SUNGAI GARANG KOTA SEMARANG
ABSTRACT: West floodway
Semarang city is one of the infrastructure for manage flood in Garang Stream.
Because of sedimentation in Garang stream, decrease flow capacity. Check Dam
construction is made beam for help reduce river slope so can decrease water
velocity and reduce capacity sediment delivery in Garang stream. Build check
dam will reduce sedimentation in downstream Garang river. From calculation fall
of rain in years with Thiessen method then do hidrology analyze using HEC-HMS
and get rate of flood 100 years in location in the amount of 386.9 m3/det.
Analyze using USLE method get erotion number amount 1.85 mm/year (32.01
ton/ha/year), and form erotion analyze get number of sedimentation amount 2.677
ton/ha/year. Location of Pramuka check dam construction is in downstream
Pramuka bridge, Pudak Payung, Semarang. With planning as following: high
physical effective main dam is 4 m, depth of foundation is 1.3 m, material for
buil check dam is form river rocks. Implementation check dam works need 6 month
and cost two billion eight hundred ninety five thousands million rupiah(Rp
2,895,000,000).
Penulis: Langlang Adi Pratama,
Susilowati, Suseno Darsono, Dwi Kurniani
Kode Jurnal: jptsipildd140482
