Evaluating Ground-Water Paths Using Hydraulic Conductivitiesa

Autor: Douglas C Kent, James W. Naney, Edward H. Seely
Rok vydání: 1976
Předmět:
Zdroj: Ground Water. 14:205-213
ISSN: 1745-6584
0017-467X
DOI: 10.1111/j.1745-6584.1976.tb03105.x
Popis: A method is presented for selecting ground-water flow paths by comparing modeled and measured hydraulic conductivity distributions. A flow chart is included which shows the steps followed in selecting the concept of groundwater flow which best fits measured hydrogeologic conditions. Both noneffluent and effluent stream conditions are evaluated using the method. Residual maps of hydraulic conductivity are used to show how modeled hydraulic conductivity may be as much as 300 times that expected when the wrong concept is used. Flow nets of modeled and measured data downstream from a flood-water-retarding structure are developed using the selected hydrogeologic conditions. Fitting hydraulic conductivity data results in a distribution of ground-water flow paths which better represent actual flow conditions. The method provides a unique means of calibrating a model in a pilot test area and applying it to geologically similar nearby watersheds. It is also useful for checking paths of subsurface flow where flow distribution is important as it is in the movement of chemical pollutants or nutrients from a source of recharge, such as a watershed impoundment, to downstream waters.
Databáze: OpenAIRE
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