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The strontium isotopes can be used to trace the groundwater, and the basic principle of tracing groundwater with strontium isotopic compositions is introduced. As the natural traces, the composition of strontium isotopes can be used to distinguish the characteristics of the rock through which the groundwater flows. We measured the strontium and carbon isotopic compositions of the groundwater to receive...
Despite its extreme aridity, the Ordos Basin in northern China is rich in groundwater. Many artesian wells or springs with large fluxes are utilized for drinking, irrigation and industrial production. In a search for the origin of the groundwater, a detailed investigation of the stable isotopes of oxygen and hydrogen in the local precipitation, the river water, the springs, the well water, as well...
In our model, firstly, we predict the residence of the offender based on the locations of the last crime scenes with three methods (distance analysis: the location that has the shortest distance to each crime site, circle fitting, probability theory), secondly, we predict the time of the next crime based on previous data with the method of fitting a straight line, next, we predict the location of...
In this study, with the method of vacuum extraction, two evaporative processes of soil water and free water under equilibrium condition were simulated. For each sample, water vapor was condensed by liquid nitrogen and was collected in four time intervals. From the analysis of hydrogen and oxygen isotopic compositions of the water collected at different times, it was discovered that the isotope fractionation...
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