%0 Journal Article
%T Distribution characteristics of nutrients in core sediments and interstitial water from different hydraulic property zones in Shiwuli Stream, Chaohu Lake<br>巢湖十五里河不同水力特性区沉积物及间隙水营养盐的分布特征
%A LI Ruzhong
%A ZHANG Liang
%A <br>李如忠
%A 张亮
%J 环境科学学报
%D 2012
%I 
%X To investigate the effects of hydraulic properties on nutrient concentration profiles of sediment and interstitial water in stream/creek, seven types of hydraulic characteristic zones were chosen in the Shiwuli Stream, Chaohu Lake. The core sediments about 40 cm thick were collected in each characteristic zone and sliced in-situ with a thickness of 2 cm, and then a total of 136 samples was obtained. According to the measured data, the vertical profiles of nitrogen and phosphorus contents both in sediment and interstitial water were illustrated, and the cluster analysis was carried out for the sampling sites. Moreover, the source-sink relationship of each of NH4+-N, NO3--N and PO43--P at the sediment-overlying water interface was explored and their vertical concentration profiles in interstitial water were modeled as well. Study results show that there are significant differences both in the nutrient content levels and distribution characteristics in sediments for the seven hydraulic characteristic zones. There are lower concentrations and inconsiderable vertical variability for NH4+-N, NO3--N and PO43--P in interstitial water in both the erosion zone on the bend and bank failure zone, but a remarkable variation characteristic was present in the growing zone of aquatic plants. At the sediment-overlying water interface, there is a good agreement on the source-sink relationship of nutrients except PO43--P, and within the depth of 0~16 cm, the concentration profiles of nutrients in interstitial water can be modeled by using exponential function y=exp(a+bx+cx2) except for the growing zone of aquatic plants, which is different from the lake or reservoir waters.
%K hydraulic properties
%K sediment
%K interstitial water
%K nitrogen and phosphorus nutrients
%K stream<br>水力特性
%K 沉积物
%K 间隙水
%K 氮磷营养物
%K 小河流
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=03A55E61A8750ACAC6AF81EF9E2AC838&aid=C134EEC2A6107929B60DFD20F9F2D248&yid=99E9153A83D4CB11&vid=9971A5E270697F23&iid=59906B3B2830C2C5&sid=644ED03C44803849&eid=53B44931A79A468F&journal_id=0253-2468&journal_name=环境科学学报&referenced_num=0&reference_num=46