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Paillet, F L

Cross-borehole flowmeter pulse tests define subsurface connections between discrete fractures using short stress periods to monitor the propagation of the pulse through the flow system. This technique is an improvement over other cross-borehole techniques because measurements can be made in open boreholes without packers or previous identification of water-producing intervals. The method is based on the concept of monitoring the propagation of pulses rather than steady flow through the fracture network. In this method, a hydraulic stress is applied to a borehole connected to a single, permeable fracture, and the distribution of flow induced by that stress monitored in adjacent boreholes. The transient flow responses...
A simple hydrologic-isotopic-balance (HIBAL) model for application to paleolake d18O records is presented. Inputs to the model include discharge, on-lake precipitation, evaporation, and the d18O values of these fluid fluxes. Monthly values of climatic parameters that govern the fractionation of 18O and 16O during evaporation have been extracted from historical data sets and held constant in the model. The ability of the model to simulate changes in the hydrologic balance and the d18O evolution of the mixed layer has been demonstrated using measured data from Pyramid Lake, Nevada. Simulations of the response in d18O to step- and periodic-function changes in fluid inputs indicate that the hydrologic balance and d18O...
Categories: Publication; Types: Citation
A simple hydrologic-isotopic-balance (HIBAL) model for application to paleolake d18O records is presented. Inputs to the model include discharge, on-lake precipitation, evaporation, and the d18O values of these fluid fluxes. Monthly values of climatic parameters that govern the fractionation of 18O and 16O during evaporation have been extracted from historical data sets and held constant in the model. The ability of the model to simulate changes in the hydrologic balance and the d18O evolution of the mixed layer has been demonstrated using measured data from Pyramid Lake, Nevada. Simulations of the response in d18O to step- and periodic-function changes in fluid inputs indicate that the hydrologic balance and d18O...
Categories: Publication; Types: Citation
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