Dinding penahan tanah tipe kantilever berdasarkan kondisi tanah, geometri
struktur, dan beban yang bekerja. Data penelitian diperoleh melalui survei
lapangan, pengujian tanah, data gambar rencana, serta data curah hujan tahun 2014–
2023. Analisis hidrologi dilakukan menggunakan metode Hidrograf Satuan Sintetik
(HSS) Nakayasu, sedangkan kecepatan aliran dihitung dengan Persamaan
Manning. Hasil analisis menunjukkan kecepatan aliran sebesar 0,33 m/s dengan
Bilangan Froude 0,03 yang termasuk aliran subkritis. Kecepatan aliran kritis
sebesar 3,84 m/s, sehingga potensi gerusan akibat kecepatan aliran tergolong
rendah. Analisis stabilitas menunjukkan faktor keamanan terhadap geser sebesar
2,41 dan guling sebesar 4,10. Daya dukung tanah diperoleh sebesar 674,97 kPa
dengan daya dukung izin 224,99 kPa. Hasil tersebut menunjukkan dinding penahan
tanah dalam kondisi stabil dan memenuhi persyaratan keamanan.
Kata Kunci: Bendung Klorahan, Dinding Penahan Tanah, Hidrologi, Stabilitas, Tipe
Kantilever.

The earth-retaining wall at the Klorahan Weir serves to maintain the stability
of the slope against soil pressure and river flow conditions. This study aims to
analyze the stability of a cantilever-type earth-retaining wall based on soil
conditions, structural geometry, and applied loads. Research data were obtained
through field surveys, soil testing, design drawings, and rainfall data from 2014–
2023. Hydrological analysis was performed using the Nakayasu Synthetic Unit
Hydrograph (SHU) method, while flow velocity was calculated using Manning’s
Equation. The analysis results show a flow velocity of 0.33 m/s with a Froude
number of 0.03, which falls within the subcritical flow range. The critical flow
velocity is 3.84 m/s; therefore, the potential for scouring due to flow velocity is
classified as low. The stability analysis indicates a safety factor against shear of 2.41
and against overturning of 4.10. The soil bearing capacity was determined to be
674.97 kPa, with an allowable bearing capacity of 224.99 kPa. These results
indicate that the earth retaining wall is in a stable condition and meets the safety
requirements.
Kata Kunci: Klorahan Dam, Earth Retaining Wall, Hydrology, Stability,
Cantilever Type.