Hydrodynamics of Open-Bottom Permeameter
Abstract
Open-bottom permeameter (OBP) is a commonly used tool for investigating properties of hydraulic conductivity of surface water-groundwater interface in lakes, streams, and estuaries. Typically, it is used as an instrument for slug tests with falling or raising head. Overwhelming majority of such tests ignore naturally occurring water fluxes across the interface. However, these fluxes are of great interest for surface water-groundwater interaction studies, and processing of OBP data can yield valuable information about their magnitude. Previous studies by Solder et al. (2016) have outlined necessary procedures and demonstrated feasibility of this approach if the head dynamics could be measured with sub-millimeter accuracy. Here, the hydrodynamic theory of the flow systems inside and outside the OBP is presented and accuracy of determining water fluxes, resulting from various variants of dynamic seepage measurements is investigated. The results will facilitate rapid, accurate, and massive interface data collection in the field studies.
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2019
- Bibcode:
- 2019AGUFM.H13N1925Z
- Keywords:
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- 0414 Biogeochemical cycles;
- processes;
- and modeling;
- BIOGEOSCIENCES;
- 0496 Water quality;
- BIOGEOSCIENCES;
- 1830 Groundwater/surface water interaction;
- HYDROLOGY;
- 1839 Hydrologic scaling;
- HYDROLOGY