Jin Juxiang, Wells Scott A, Liu Defu, Yang Guolu, Zhu Senlin, Ma Jun, Yang Zhengjian
School of Water Resources and Hydropower Engineering, Wuhan University, Wuhan, Hubei, China.
Department of Civil and Environmental Engineering, Portland State University, Portland, OR, USA.
PeerJ. 2019 May 15;7:e6925. doi: 10.7717/peerj.6925. eCollection 2019.
Xiangxi River is a typical tributary of Three Gorges Reservoir (TGR) in China. Based on field observations in 2010, thermal stratification was significant in most months of the year. Through field data analysis and numerical simulations, the seasonal and spatial variation of thermal stratification as related to the impact of the operation of TGR were investigated. Thermal stratification was most pronounced from April to September in the Xiangxi River tributary. Air temperature (AT) and water level (WL) were the two dominant variables impacting thermal stratification. AT affected the surface water temperature promoting the formation of thermal stratification, and high WLs in TGR deepened the thermocline depth and thermocline bottom depth. These results provide a preliminary description of the seasonal variation and spatial distribution of thermal stratification, which is important for better understanding how thermal stratification affects algae blooms in Xiangxi River.
香溪河是中国三峡水库的一条典型支流。基于2010年的实地观测，一年中大部分月份热分层现象显著。通过实地数据分析和数值模拟，研究了与三峡水库运行影响相关的热分层的季节和空间变化。香溪河支流的热分层在4月至9月最为明显。气温（AT）和水位（WL）是影响热分层的两个主要变量。气温影响地表水温度，促进热分层的形成，三峡水库的高水位加深了温跃层深度和温跃层底部深度。这些结果初步描述了热分层的季节变化和空间分布，这对于更好地理解热分层如何影响香溪河的藻类水华至关重要。
