中文摘要：

在证明了采用误差均方差最小意义下,多传感器数据融合的效果优于利用任一单个传感器进行估计的效果,采用决策级融合方法,将其应用于某坝9坝段地下水宏观动态分析。经分析知：该坝段在2003～2004年为地下水宏观动态的相对突变时期,自2004年以后,坝基地下水宏观动态与库水之间的相关程度又趋于相对的稳定时期,表明该坝段坝基帷幕体的防渗性能至少出现了局部的衰减、且具有阶段性变化的特点;就分析时段而言,2003～2004年间为帷幕体防渗性能明显衰减时期,而2004年以后为其相对稳定时期。

英文摘要：

The fusion efficiency of multi-sensor being theoretically proved to be better than that of any single sensor, analysis of groundwater macroscopic regime under a dam section was carried out by using a decision-making fusion method. As a result, following aspects can be identified.（1） The macroscopic regimes under dam section 9 had the tendency of increasing with time between 2003 and 2004, the close relationship with the reservoir water level; （2） The macroscopic regimes of section 9 kept close relationship with the reservoir water level from 2004 to 2007; （3） the anti-seepage performance of the curtain-grouting was to be weakened locally.