A Method for Installing Piezometers in Large Cobble Bed Rivers
A Method for Installing Piezometers in Large Cobble Bed Rivers
复制标题
大型卵石床河流安装渗压计的方法
DOI：
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
T. Gonser
中科院分区：
文献类型：
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作者：
D. Geist;Mark C. Joy;D. Lee;T. Gonser
本文介绍了一种冲击驱动点法，用于在卵石河床中安放测压计，以前在不使用钻机的情况下，这是很困难的。为了迫使驱动点压力计通过coble，通过使用内部驱动杆将气动锤的振动冲击直接传递到驱动点。插入深度后，驱动杆从压力计的下部移除，并添加立管以将压力计延伸到河平面以上。以这种方式安装的压力计允许水质分析和动态测量卵石沉积物中的垂直电位，粒径从2.5到>30 cm，该方法已成功地用于美国的哥伦比亚河和瑞士的Töss河。这种创新方法提供了高渗透性卵石沉积物中孔隙水的流体动力学信息，这些沉积物在高能河流和湖泊底部很常见。使用内部驱动杆法安装的压力计便于评估地下水/地表水界面的补给和排放的时空动态，并分析河流和溪流的潜流带与地表水之间的生态连通性。这些信息将导致改善与我国地下水和地表水供应有关的管理决策。
An impact drive point method is described for emplacing piezometers in a cobble river bottom where this has previously been difficult without the use of drilling rigs. To force the drive point piezometers through coble, the vibrational impact of an air‐powered hammer was carried directly to the drive point by the use of an internal drive rod. After insertion to depth, the drive rod was removed from the lower portion of the piezometer and a standpipe was added to extend the piezometer above the river level. Piezometers installed in this way have permitted water quality analysis and dynamic measurement of vertical potentials in cobble sediments ranging in size from 2.5 to >30 cm and the method has been successfully used in the Columbia River, USA, and Töss River, Switzerland. This innovative method provides information on the hydrodynamics of pore water in highly permeable, cobble deposits that are common in high‐energy river and lake bottoms. Piezometers installed using the internal drive rod method facilitate the assessment of the temporal and spatial dynamics of recharge and discharge at the ground water/surface water interface and analyses of the ecological connectivity between the hyporheic zone and surface water of rivers and streams. This information will lead to improved management decisions related to our nation's ground water and surface water supplies.