A Study on the Flux of Total Suspended Matter in the Padma River in Bangladesh Based on Remote-Sensing Data
| Autor: | Xianqiang He, Yan Bai, Fang Gong, Zhuoqi Zheng, Difeng Wang |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Hydrology
geography geography.geographical_feature_category Water supply for domestic and industrial purposes Geography Planning and Development Drainage basin Flux Estuary Hydraulic engineering Vegetation Aquatic Science Bay of Bengal Biochemistry total suspended matter Total suspended matter Soil water Environmental science Suspended matter TC1-978 TD201-500 Bay Landsat flux estimation Water Science and Technology |
| Zdroj: | Water Volume 13 Issue 17 Water, Vol 13, Iss 2373, p 2373 (2021) |
| ISSN: | 2073-4441 |
| DOI: | 10.3390/w13172373 |
| Popis: | The flux of total suspended matter (TSM), FTSM, output by several large rivers in Asia, has been in decline due to human activities. As the estuary of the Ganges–Brahmaputra River, the Padma River transports a significant amount of suspended matter (SM) to the Bay of Bengal each year. In this study, the TSM concentration (CTSM) and FTSM in the Padma River in the period 1991–2019 were calculated based on the data acquired by the Landsat series satellites and an empirical TSM algorithm model for large, high-turbidity rivers. The results showed that the maximum and minimum FTSM values (318 ± 62 and 73 ± 29 mt, respectively) in the Padma River occurred in 2011 and 2015, respectively. On average, FTSM in the Padma River decreased at an annual rate of 3.3 mt (p < 0.01). The impact of human activities on CTSM contributed more significantly to the changes in FTSM (R = 0.76) than natural factors (R = 0.44). Due to a lack of water conservancy facilities within the river basin, changes in the water and soil retention capacity due to the changes in vegetation coverage were an important human factor (R = −0.79). |
| Databáze: | OpenAIRE |
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