Tracy Nishikawa
Tracy Nishikawa is a Scientist Emeritus at the California Water Science Center.
Science and Products
Filter Total Items: 38
Testing alternative conceptual models of seawater intrusion in a coastal aquifer using computer simulation, southern California, USA
Two alternative conceptual models of the physical processes controlling seawater intrusion in a coastal basin in California, USA, were tested to identify a likely principal pathway for seawater intrusion. The conceptual models were tested by using a two-dimensional, finite-element groundwater flow and transport model. This pathway was identified by the conceptual model that best replicated the his
Authors
Tracy Nishikawa
Combined use of flowmeter and time-drawdown data to estimate hydraulic conductivities in layered aquifer systems
The vertical distribution of hydraulic conductivity in layered aquifer systems commonly is needed for model simulations of ground-water flow and transport. In previous studies, time-drawdown data or flowmeter data were used individually, but not in combination, to estimate hydraulic conductivity. In this study, flowmeter data and time-drawdown data collected from a long-screened production well an
Authors
R. T. Hanson, Tracy Nishikawa
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Filter Total Items: 38
Testing alternative conceptual models of seawater intrusion in a coastal aquifer using computer simulation, southern California, USA
Two alternative conceptual models of the physical processes controlling seawater intrusion in a coastal basin in California, USA, were tested to identify a likely principal pathway for seawater intrusion. The conceptual models were tested by using a two-dimensional, finite-element groundwater flow and transport model. This pathway was identified by the conceptual model that best replicated the hisAuthorsTracy NishikawaCombined use of flowmeter and time-drawdown data to estimate hydraulic conductivities in layered aquifer systems
The vertical distribution of hydraulic conductivity in layered aquifer systems commonly is needed for model simulations of ground-water flow and transport. In previous studies, time-drawdown data or flowmeter data were used individually, but not in combination, to estimate hydraulic conductivity. In this study, flowmeter data and time-drawdown data collected from a long-screened production well anAuthorsR. T. Hanson, Tracy Nishikawa