Page - 367 - in Book of Full Papers - Symposium Hydro Engineering

Fig. 7 Image of channel block division and SAR interference analysis 2.3.3. Results of SAR image analysis Interference analysis on adjacent SAR images by the method shown in Fig. 6 and Fig. 7, the changes in ground height of each mesh occured between two SAR images is directly obtained. And by each mesh area (si) x average height (Δhi), the volume change (Δvi = si × Δhi) of each mesh is calculated. Then, cumulating the results from each mesh the total volume of sediment transport for each block or the whole section can be calculated. The vertical sectional view of the riverbed height variation (block average) calculated by the above method is shown in Fig. 8. While, the volume of sediment transport for every analysis period (① to ⑧) is shown in Table 3 and Fig. 9, and the temporal change of sediment volume within the study river section is shown in Fig. 10. Table 3 Sediment transport volume by inSAR image analysis No. Analysis period Period （Day） Sediment change volume by inSAR analysis Vs (m3) from to ① 2014/09/19 2014/11/28 70 9743.98 ② 2014/11/28 2015/04/03 126 -5361.75 ③ 2015/04/03 2015/06/26 84 1840.07 ④ 2015/06/26 2016/03/18 266 -21229.55 ⑤ 2016/03/18 2016/06/24 98 9752.34 ⑥ 2016/06/24 2016/11/25 154 1599.06 ⑦ 2016/11/25 2017/03/03 98 -648.32 ⑧ 2017/03/03 2017/06/09 98 9596.02 Block1 Block5 Block1 Block5 Legend (m) 367