Leising Geoscience, 4930 N. Cimarron Road, Las Vegas, NV, 89149, USA,
Environ Monit Assess. 2014 Dec;186(12):8997-9010. doi: 10.1007/s10661-014-4060-7. Epub 2014 Sep 25.
An important component of ongoing water-resource investigations in the eastern Great Basin, USA, has been to ascertain the impact of future predicted climate change on groundwater availability. As a first step in that analysis, it was hypothesized that potentiometric fluctuations at certain wells would reflect annual-scale precipitation variation. Potentiometric behavior at a well depends on local hydrologic conditions, well construction, and human activities, in addition to natural recharge and regional water levels. Moreover, measurement data are limited for many wells. After preliminarily screening, a large body of well and climate station data, short-term potentiometric responses to annual-scale climate inputs, were identified at 18 wells using a simple visualization methodology developed during the study. For water levels displaying multi-annual trends, the signals were measured as deviations from a linear trendline. Groundwater responses lagged precipitation signals by less than 1 year to as much as 3 years, with most wells showing at most a 1- to 2-year delay. Response amplitude was variable and strongly depended on the hydrologic setting of each well.
美国大盆地东部正在进行的水资源调查的一个重要组成部分是确定未来预测气候变化对地下水供应的影响。作为该分析的第一步，假设某些井的测压水位波动将反映年度尺度的降水变化。测压水位的行为取决于当地的水文条件、井的结构和人类活动，以及自然补给和区域水位。此外，许多井的测量数据有限。在初步筛选后，利用研究过程中开发的一种简单可视化方法，在 18 口井中确定了大量井和气候站数据，以及短期测压水位对年度气候输入的响应。对于显示多年趋势的水位，信号被测量为偏离线性趋势线的偏差。地下水响应滞后于降水信号不到 1 年，最长可达 3 年，大多数井的延迟时间最多为 1 到 2 年。响应幅度变化较大，强烈依赖于每个井的水文条件。
