Groundwater contour mapping in Venice by stochastic interpolators. 2. Results
Groundwater contour mapping in Venice by stochastic interpolators. 2. Results
复制标题
通过随机插值器绘制威尼斯地下水等高线图。
DOI：
10.1029/wr015i002p00291
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发表时间：
1979
影响因子：
5.4
通讯作者：
G. Mozzi
中科院分区：
文献类型：
--
作者：
G. Volpi;G. Gambolati;L. Carbognin;P. Gatto;G. Mozzi
需要可靠和灵活的工具来控制威尼斯泻湖的地下流场和相关的地面沉降。文献1(Gambolati和Volpi，1979)中开发的随机内插器就是一个这样的工具，用于绘制1973年和1977年威尼斯三个主要含水层的测压图。相当少的不均匀分布在大陆、威尼斯和沿海地区的测试孔提供了输入数据。输出是改造后的水头，并对其可靠性进行了评估。1973年的结果显示，以马尔盖拉港工业区为中心存在一个明显的凹陷锥，到目前为止，该工业区是整个地区的主要抽水点。当地的提款在威尼斯产生了一个小锥体，但它们不能解释那里记录的总体人头下降。1977年的等高线地图显示，地下水盆地上部250米处的流场得到了实质性恢复，从而为最近观察到的陆地表面反弹提供了文件证据(Carbognin等人，1976年)。在含水层系统的最低单位(∼280m)仍有大量剩余抽水。
Reliable and flexible tools are required to keep under control the subsurface flow field of the Venetian lagoon and the related land subsidence. One such tool is given by the stochastic interpolator developed in paper 1 (Gambolati and Volpi, 1979) and used to map the 1973 and 1977 piezometry of three major Venetian aquifers. A fairly small number of test holes unevenly scattered across the mainland, Venice, and the littorals provide the input data. The output is the reconstructed hydraulic head together with an assessment of its reliability. The 1973 results show the existence of a pronounced cone of depression centered upon the industrial area of Porto Marghera, which turns out to be by far the major pumping site in the whole area. Local withdrawals produce a minor cone in Venice, but they do not account for the overall head decline recorded there. The 1977 contour maps show a substantial recovery of the flow field in the upper 250 m of the groundwater basin, thus providing documentary evidence for the recently observed rebound of the land surface (Carbognin et al., 1976). Significant residual withdrawals still occur in the lowest unit (∼280 m) of the aquifer system.