中文摘要：

地下水污染监测网的设计包括取样点在空间上的采样位置和时间上的取样频率这两方面的确定,其目的是为了准确刻画污染羽在含水层中随时间的变化状况.介绍了一种新的基于Delaunay三角形剖分方法用于地下水污染监测网在空间上的去冗余设计.同时,针对Delaunay方法没有考虑含水层参数变化和不能新增必要监测点的缺陷,提出了改进措施.改进的Delaunay方法可以直接与污染物的运移模型耦合,通过获取的含水层参数能够比较好地检验监测网在空间上的去冗余设计效果.实例研究表明,该方法在保证监测精度的基础上,能够找到最优的空间取样位置点,同时与改进前相比,利用该方法得到的地下水污染监测网能更加客观地反映污染物在含水层中的空间分布特征.

英文摘要：

The groundwater monitoring network design involves the determination of the sampling locations and sampling frequencies to characterize the contaminant plume in an aquifer over space and time. This paper introduces a spatial sampling reduction method, the Delaunay method based on Delaunay triangularization, to identify and eliminate the redundant sampling wells of an existed long-term contaminant monitoring network. Considering that the Delaunay method is applicable to both the heterogeneous aquifers and inserting additional sampling locations in the insufficient monitoring network, a modified Delaunay method coupled with contaminant transport model is developed to deal with these issues. The results of this study indicate that the modified Delaunay method can be used as an efficient tool for the cost-effectively spatial sampling network design mean while keeping the accuracy of the characterization of the contaminant plume.