Ahmad Rifa’i
Department of Civil and Environmental Engineering, Faculty of Engineering, Universitas Gadjah Mada, Yogyakarta 55281,
Indonesia

Ragil A. Yuniawan
1) Department of Civil and Environmental Engineering, Faculty of Engineering, Universitas Gadjah Mada, Yogyakarta 55281, Indonesia. 2) Balai Teknik Sabo, Direktorat Bina Teknik, Ministry of Public Works and Housing, Yogyakarta 55282, Indonesia.

Fikri Faris
Department of Civil and Environmental Engineering, Faculty of Engineering, Universitas Gadjah Mada, Yogyakarta 55281,
Indonesia

Tiara R. Trisnawati
Department of Civil and Environmental Engineering, Faculty of Engineering, Universitas Gadjah Mada, Yogyakarta 55281,
Indonesia

Byon Rezy Pradana Purba
Department of Civil and Environmental Engineering, Faculty of Engineering, Universitas Gadjah Mada, Yogyakarta 55281,
Indonesia

Andy Subiyantoro
3) Faculty of Geoinformation Science and Earth Observation (ITC), University of Twente, Enschede 7514 AE, The Netherlands. 4) Balai Besar Wilayah C3, Direktorat Jenderal Sumber Daya Air, Ministry of Public Works and Housing, Banten 206111, Indonesia.

Eka Priangga Hari Suryana
Balai Teknik Sabo, Direktorat Bina Teknik, Ministry of Public Works and Housing, Yogyakarta 55282,
Indonesia

Banata Wahid Ridwan
Balai Teknik Sabo, Direktorat Bina Teknik, Ministry of Public Works and Housing, Yogyakarta 55282,
Indonesia