Improvement of water quality by sediment capping and re-vegetation with Vallisneria natans L.: A short-term investigation using an in situ enclosure experiment in Lake Erhai, China
| Autor: | Liang He, Tianshun Zhu, Leyi Ni, Liang Ni, Te Cao, Chunlong Yi, Changbo Yuan, Ping Xie |
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| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
Hydrology Environmental Engineering 010604 marine biology & hydrobiology Phosphorus chemistry.chemical_element Sediment Vegetation 010501 environmental sciences Management Monitoring Policy and Law 01 natural sciences Nitrogen Water column chemistry Phytoplankton Environmental science Water quality Trophic state index 0105 earth and related environmental sciences Nature and Landscape Conservation |
| Zdroj: | Ecological Engineering. 86:113-119 |
| ISSN: | 0925-8574 |
| Popis: | This study evaluated the effects of sediment capping with local unpolluted soil and re-vegetation with Vallisneria natans on the water quality in a two-month in situ experiment in a mesotrophic lake. Water quality was improved substantially by sediment capping whether alone or along with re-vegetating using V. natans, although varied greatly with time. Sediment capping was an effective technique to reduce nitrogen (N) and phosphorus (P) release from fertile sediment, which thus inhibited phytoplankton growth in the water column. Re-vegetation using V. natans helped to improve water quality slightly more. Sediment capping alone or along with re-vegetating also changed interactions of the water quality parameters substantially. Compared to the control, sediment capping alone enforced the relationships between Chia and both SD and K, but along with re-vegetation weakened the relationships. In addition, sediment capping alone enforced the relationship between Chl-a and N-NH4, but with or without along with the re-vegetation the relationships between Chl-a and both TN and N-NO3 decreased. (C) 2015 Elsevier B.V. All rights reserved. |
| Databáze: | OpenAIRE |
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