Hydrological controls on cascade reservoirs regulating phosphorus retention and downriver fluxes
Hydrological controls on cascade reservoirs regulating phosphorus retention and downriver fluxes
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梯级水库水文控制调节磷滞留和下游通量
DOI：
10.1007/s11356-016-7397-3
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发表时间：
2016-09
影响因子：
5.8
通讯作者：
Huang Bangqin
中科院分区：
文献类型：
--
作者：
Lu Ting;Chen Nengwang;Duan Shuiwang;Chen Zhuhong;Huang Bangqin
许多沿海河流有一个梯级水库系统，但这些水库在调节营养物质从流域到海岸运输方面的作用尚不清楚。本研究于2012年-2013年对九龙江北部(中国东南段)三种水文条件(丰、中、枯水)下表层水和表层沉积物中的磷进行了观测，并对某梯级水库(西皮水库)中磷的月尺度动态进行了研究。结果表明，上游溶解性活性磷(DRP)浓度在纵向上一直呈下降趋势，梯级水库段的DRP浓度最低，可能是由于支流输入和就地吸收所致。基流期间降幅最大，自由流段DRP最大，梯级水库最小。西皮水库的月度监测结果表明，下游河段和过渡带的DRP、总颗粒磷(TPP)和总磷(TP)普遍下降。年物质平衡结果表明，西皮水库(湖相)是总磷的汇(6%的滞留量)，但在一定程度上是总磷(−0.3%)和总磷(1%)的源。即使扩大到整个梯级水库系统，与世界各地的水库相比，磷的截留率也很低，这是由于磷负荷高和水力停留时间短所致。然而，控制有梯级水库的沿海河流磷滞留的主要过程是从干冷季的沉积到湿暖季的生物转化，从而影响从流域到海岸的磷负荷和组成。这项研究突出了梯级水库在调节不同季节磷的滞留和下游通量方面的水文控制作用。
Many coastal rivers have a system of cascade reservoirs, but the role of these reservoirs in regulating nutrient transport from watershed to coast is still unknown. In this study, phosphorus (P) in surface water and top sediment was investigated along the North Jiulong River (southeast China) under three hydrological conditions (high flow, medium flow and low flow) in 2012–2013, and P dynamics in a cascade reservoir (Xipi Reservoir) were studied on a monthly scale. Results showed that the concentrations of dissolved reactive phosphorus (DRP) consistently decreased longitudinally in the upper river with the lowest values observed in the section of cascade reservoirs, likely due to tributary inputs and in situ uptakes. The decrease was most rapid during base flow when DRP was highest in the free-flowing river section and lowest in cascade reservoirs. Results from monthly monitoring on the Xipi Reservoir showed general downriver decreases in DRP, total particulate phosphorus (TPP) and total phosphorus (TP) in the riverine zone and transition zone. Mass balance results on an annual basis suggest that the Xipi Reservoir (lacustrine zone) was an overall sink for TPP (6 % retention) but somewhat a source of DRP (−0.3 %) with TP retention (1 %). Even scaled up to the whole cascade reservoir system, P retention was low compared with worldwide reservoirs, which we ascribe to the high P loading and short hydraulic residence time. Nevertheless, major processes controlling P retention in coastal rivers with cascade reservoirs varied from sedimentation in the dry-cold season to biotic transformation in the wet-warm season, thereby affecting loading and composition of P from watershed to the coast. This study highlights the hydrological controls on the role of cascade reservoirs in regulating P retention and downriver fluxes in different seasons.
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影响因子：
11.4
作者：
C. Stamm;H. Jarvie;Thadd Scott
通讯作者：
C. Stamm;H. Jarvie;Thadd Scott
影响因子：
2.6
作者：
P. Zieliński;E. Jekatierynczuk-Rudczyk
通讯作者：
P. Zieliński;E. Jekatierynczuk-Rudczyk
DOI：
10.1039/a807778i
发表时间：
1999
期刊：
Journal of environmental monitoring : JEM
影响因子：
--
作者：
V. Ruban;J. F. López-Sánchez;P. Pardo;G. Rauret;H. Muntau;P. Quevauviller
通讯作者：
V. Ruban;J. F. López-Sánchez;P. Pardo;G. Rauret;H. Muntau;P. Quevauviller
影响因子：
12.8
作者：
Lei Huang;H. Fang;D. Reible
通讯作者：
Lei Huang;H. Fang;D. Reible
影响因子：
--
作者：
J. Némery;J. Garnier
通讯作者：
J. Némery;J. Garnier