Moehammad Awaluddin

Geodetic deformation monitoring at Pendidikan Diponegoro Dam

Deformation monitoring is one indicator to assess the feasibility of Dam. In order to get the correct result of the deformation, it is necessary to determine appropriate deformation monitoring network and the observation data should be analyse and evaluated carefully. Measurement and analysis of deformation requires relatively accurate data and the precision is high enough, one of the observation method that used is GPS (Global Positioning System). The research was conducted at Pendidikan Undip Dams is Dam which is located in Tembang. Diponegoro Dam was built in 2013 and a volume of 50.86 m3 of water, inundation normal width of up to 13,500 m2. The main purpose of these building is not only for drainage but also for education and micro hydro power plant etc. The main goal of this reasearch was to monitor and analyze the deformation at Pendidikan Undip Dam and to determaine whether GPS measurement could meet accuracy requirement for dam deformation measurements. Measurements were made 2 times over 2 years,...

Study of interseismic coupling rate of 2007 Mentawai earthquake using GNSS data

A maximum of horizontal interseismic velocity rate of SuGAr station is 0.4308 m/year at BTET Station (Siberut Island) and 0.0116 m/year at BSAT Station (Pagai Island) for the vertical component from GNSS data observation. Using the inversion calculation, this research calculated interseismic coupling rate of 2007 Bengkulu/Mentawai earthquake. The inversion calculation was conducted in 30×10 discrete units of earthquake plane by giving a weight of smoothing constraint and a weight of slip value constraint = 0 at the edge of the earthquake rupture area. The maximum coupling rate is located around BSAT/PRKB station (Pagai Island) and BTET/MSAI station (Siberut Island). The rupture of earthquake plane was located around BSAT/PRKB station (Pagai Island). While the earthquake plane around BTET/MSAI station (Siberut Island) has not rupture yet until now.