2010.4-2011.3 Yearbook of NILIM
Research Summary
Environment Department
| Reference Number | Y100102 |
| Title | Research on evaluation and the correspondence of the water environment in consideration of the fine sediment influence on river environment |
| Start-End Date | 2009.4-2011.3 |
| Division | River Environment Division |
| Author |
Head,Kunihiko AMANO Senior researcher,Takashi HARANO Researcher, Maremi ENDO Researcher, Kanako ITO |
| Summary | In this research, for evaluation of the impact of dams on the environments of the rivers downstream from the dams, We have conducted field survey to investigate the change in river bed and invertebrate features which may be found between upstream and downstream of 79 dams. From these results, Riverbed material seems coarser at any immediately downstream sites due to the trap of sediment behind dams; however show the difference of the recovery trend from armoring phenomenon by basin characteristics. So then we apply the statistical analysis to evaluation of the recovery speed and classify 18 dams under four groups. |