Phosphorus status on overlying water - sediment of typical riparian wetlands in Hangjiahu plain region and its impact to water quality
Typical riparian wetlands were investigated to understand the status and characteristics on phosphorus (P) of overlying water and sediments located in south region of Taihu Lake basin, along with a case study of Xiazhuhu wetland. The field investigation shows that total phosphorus (TP) in sediment r...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Zhejiang University Press
2009-07-01
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| Series: | 浙江大学学报. 农业与生命科学版 |
| Subjects: | |
| Online Access: | https://www.academax.com/doi/10.3785/j.issn.1008-9209.2009.04.016 |
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| Summary: | Typical riparian wetlands were investigated to understand the status and characteristics on phosphorus (P) of overlying water and sediments located in south region of Taihu Lake basin, along with a case study of Xiazhuhu wetland. The field investigation shows that total phosphorus (TP) in sediment reached 0.17 to 1.20 mg·g<sup>-1</sup> with the corresponding maximal P sorption capacity of 228.1 to 824.5 mg·kg<sup>-1</sup>, implying tend of P accumulation in sediment. There was significant relationship between NaOH + EDTA-P extractable P and TP/Olsen-P in sediment. TP in overlying water was found in rang of 0.036 to 0.944 mg·L<sup>-1</sup>, which commonly reached over the critical level responding for water eutrophication. Total particulate P (TPP) concentration in overlying water samples occupied 69.1% ± 15.0% of TP, while dissolved reactive P (DRP) being relatively low. Wetlands located around the water reservation areas were found lowest in term of P concentration in overlying water, compared with agricultural/livestock farming/living zones. Typical investigation and case study proved that there was no significant relationship between TP concentration in overlying water and TP (and/or Olsen-P) level in sediments. The variation of phosphorus in overlying water of those wetlands would be not predicted only by the status of P accumulation along with the corresponding levels of different forms of P in sediment. |
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| ISSN: | 1008-9209 2097-5155 |