Zhang Yu, Liu De-fu, Ji Dao-bin, Yang Zheng-jian, Chen Yuan-yuan
College of Hydraulic & Environmental Engineering, China Three Gorges University, Yichang 443002, China.
Huan Jing Ke Xue. 2012 Aug;33(8):2621-7.
Frequent spring blooms have been observed in tributary bays of Three Gorges Reservoir (TGR) since its initial filling. In order to study Three Gorges Reservoir of nutrients by the River tributaries reverse effect, a well-designed field monitoring plan was conducted. The results show: there are significant intrusions from Three Gorges Reservoir to Xiangxi Bay to the surface, middle and bottom with three forms of intrusion respectively. The unique flow characteristics provide a hydrodynamic background of nutrient distributions of Xiangxi Bay. The average instantaneous fluxes of the input TN and TP of the intrusions from the confluence were 501.92 g x s(-1) and 48.17 g x s(-1), respectively; TN and TP loads originated from intrusions accounted for 43.4% and 21.5%, respectively to total amount in the whole year. The study shows that intrusion of the total nitrogen input, a large proportion of total phosphorus, and reducing the pollution loads of tributaries and upper reach basin of Three Gorges Reservoir is the fundamental way to eradicate algal blooms.
自三峡水库首次蓄水以来，在其支流港湾频繁观测到春季水华现象。为了通过河流支流的反向作用研究三峡水库的营养物质，开展了精心设计的现场监测计划。结果表明：三峡水库对香溪河湾表层、中层和底层均有显著入侵，入侵形式有三种。独特的水流特征为香溪河湾营养物质分布提供了水动力背景。汇合处入侵水体输入总氮（TN）和总磷（TP）的平均瞬时通量分别为501.92 g·s⁻¹和48.17 g·s⁻¹；入侵产生的TN和TP负荷分别占全年总量的43.4%和21.5%。研究表明，减少三峡水库支流及上游流域的污染负荷，是根除水华现象的根本途径，其中总氮输入、总磷很大一部分来源于入侵。
