PDF《留特征》

第35 卷第

1 期2015 年1月环境科学学报Acta Scientiae Circumstantiae Vol.

35,No.1 Jan.,

2015 基金项目: 国家自然科学基金(No.51179042) Supported by the National Natural Science Foundation of China(No.51179042) 作者简介: 李如忠(1970―),男,教授(博士),E?mail: Lrz1970@ 163.com;

?通讯作者(责任作者) Biography: LI Ruzhong(1970―),male,professor(Ph.D.),E?mail: Lrz1970@ 163.com;

?Corresponding author DOI:10.13671 / j.hjkxxb.2014.0730 李如忠,董玉红,钱靖,等.2015.合肥地区不同类型源头溪流暂态存储能力及氮磷滞留特征[J].环境科学学报,35(1):128?136 Li R Z, Dong Y H, Qian J, et al. 2015.Transient storage capacity and nitrogen and phosphorus retention characteristics of different sorts of headwater streams in Hefei area[J].Acta Scientiae Circumstantiae,35(1):128?136 合肥地区不同类型源头溪流暂态存储能力及氮磷滞 留特征 李如忠? ,董玉红,钱靖,杨继伟,唐文坤 合肥工业大学 资源与环境工程学院,合肥

230009 收稿日期:2014?03?04 修回日期:2014?05?04 录用日期:2014?05?07 摘要:为揭示合肥地区不同类型源头溪流暂态存储能力及氮磷吸收滞留的基本特征,在城区和城郊筛选

4 条典型源头溪流,并以 NH4 Cl、 KH2 PO4 为添加营养盐,以NaCl 为保守型示踪剂,开展现场示踪实验.在此基础上,利用 OTIS 模型水文参数(D、A、As 和α),计算暂态存储指标 (Ts 、Tc 、Ls 、Rh 和F200 med ),进而开展暂态存储能力分析,并以 NH+

4 ?N 和SRP 一阶吸收系数(λ、λs )解析氮磷滞留特征.结果表明:4 条溪流水体的 α 值均处于 10-4 ~10-3 数量级;

各溪流 Tc 基本都显著超过 Ts ,意味着这些溪流水体溶质滞留效应主要来自主渠道流动水体,而不是暂态存储 区;

根据 Tc 、Ts 、Ls 和Rh 等指标,得到各源头溪流暂态存储能力排序为:二十埠河二级支流>

二十埠河一级支流>

十五里河源头段>

关镇河支渠;

4 条源头溪流主渠道流动水体与暂态存储区的 NH+

4 ?N、SRP 滞留特征存在很大的差异,并且二十埠河

一、二级支流和十五里河均不同程度出现 λ?NH+

4 、λs ?NH+

4 为负值的现象,意味着这些水体对于 NH+

4 ?N 既具有短期存储作用,也起着 源 的作用. 关键词:源头溪流;

OTIS 模型;

水文参数;

暂态存储指标;

氮磷滞留 文章编号:0253?2468(2015)01?129?09 中图分类号:X522 文献标识码:A Transient storage capacity and nitrogen and phosphorus retention characteristics of different sorts of headwater streams in Hefei area LI Ruzhong? , DONG Yuhong, QIAN Jing, YANG Jiwei, TANG Wenkun School of Resources and Environmental Engineering, Hefei University of Technology,

230009 Received

4 March 2014;

received in revised form

4 May 2014;

accepted

7 May

2014 Abstract: To investigate the capacity of transient storage and characteristics of nitrogen and phosphorus retention of different sorts of headwater streams in Hefei, four typical headstreams were chosen in urban and suburban areas. A series of instantaneous tracer experiments were carried out on the chosen stream reaches by taking NH+

4 Cl and KH2 PO4 as nutrient additions and NaCl as conservative tracer. Transient storage metrics (i.e. Ts , Tc , Ls , Rh and F200 med ) were estimated according to the hydrological parameters (i.e. D, A, As and α) in OTIS model to explore the capacity of transient storage, and first? order uptake rates of NH+

4 ?N and SRP arising from OTIS model calculation were also used to delineate the characteristics of nitrogen and phosphorus retention for above headstreams. The results showed that the values of exchange coefficient α for the four headstreams were all in the order of magnitude of 10-4 ~10-3 . Nearly all the Tc values were remarkably higher than that of Ts , suggesting that the solute retention effect should be dominated by main channel rather than transient storage zone for the four streams. After considering all these metrics of Ts , Tc , Ls and Rh , the order of transient storage capacity were obtained as the second?order stream of Ershibuhe River>