| 作成年度 | 2016 年度 |
|---|---|
| 論文名 | Monitoring of sandbars migration process in mega-sized braided river using MODIS |
| 論文名（和訳） | |
| 論文副題 | |
| 発表会 | |
| 誌名 | Conference: River Flow 2016, At St. Louis, Mo. USA, Volume: Constantinescu, Garcia & Hanes (Eds) ? 2016 |
| 巻・号・回 | 7 |
| 発表年月日 | 2016/07/01 |
| 所属研究室／機関名 | 著者名（英名） |
|---|---|
| ICHARM | R. K. Biswas |
| PWRI | A.Yorozuya |
| ICHARM | S.Egashira |
| 抄録 |
|---|
| The present study proposes a suitable method to monitor sandbars using satellite-based information. The target area is Jamuna River, Bangladesh where sandbars often form and deform both in space and time. The authors employ threshold and gradient based methods to identify sandbars behavior. The threshold-based method (TBM) extracts water and land by computing the Modified Land Soil Water Index (MLSWI) using MODIS 8-day composite dataset. The gradient-based method (GBM) focuses on the edges between the surface types and produces comparatively better results using MODIS daily surface reflectance without any threshold. The results suggest that the sandbars’ sizes and shapes identified by the proposed method closely coincide with the field investigation. The proposed method is validated by a specific field investigation and is applied to sandbars mappin |
