PERENCANAAN GROUND SILL DI SUNGAI SENJOYO KABUPATEN SEMARANG
ABSTRACT: Senjoyo River is a
tributary of Tuntang River which are ±138 km2catchment area, 37 km length and
0,008 bottom slope. That condition causes scour at the bridge foundation. The
location of bridge is in Tempuran Village, Bringin Subdistric, Semarang
Regency. The solution to conserve the Senjoyo River has to build a ground sill.
Ground sill is building cross river which is built to protect degradation in
the upstream of river. The ground sill analysis is needed hydrologic analysis
to calculate the design flood discharge, hydraulic analysis to calculate the
passing capacity discharge, analysis of sediment transport and riverbed’s
stability to calculate the value of stable slope and bank protection, hydraulic
analysis to compute the dimension of new river, slope stable analysis to
calculate the riverbank slope which is stable and the design of ground sill to
calculate the dimension of ground sill, stilling basin and bottom protection.
The conclution of ground sill design is 2 m ground sill height, 62 m ground
sill width, 16 m stilling basin length and 20 m bottom protection length. The
conclution of river normalization is 0,00024 stable slope, 120 m new river
width and 1:1 riverbank slope. The ground sill can protect the foundation
bridge and can be increase the river bottom level until the existing of river
bottom level before degradation.
Penulis: Ichwan Rachmat Putra,
Imam Adi Prabowo, Sri Eko Wahyuni, Al Falah
Kode Jurnal: jptsipildd150182
