A three-dimensional finite-difference model, MODFLOW-2005 (version 1.12.00), was developed to better understand how Seepage Meter efficiency changes when installed in sediments with wide range of conductivities. The hypothesis is that coarser sediments will allow a greater portion of upward-flow to flow around the meter instead of through it. The hypothetical model simulates upward flow through unconsolidated sediments in the Seepage Meter Calibration Tank operating at the Denver Federal Center in Lakewood, Colorado. The particle-tracking program, MODPATH (version 5), is used to visualize flow through and around a seepage meter in sediments with conductivities ranging from 0.01 m/d to 100 m/d. Volumes of flow both inside and outside of the Seepage Meter are calculated with Zonebudget (version 3) and these volumes are presented in the workbook \ancillary\Seep95.xlsx. In adjacent columns of the worsheet, volumes are normalized by surface area to calculate vertical seepage rates and the associated reduction in seepage meter efficiency with increasing sediment conductivity. The conceptualization and discretization of the numerical model are described in the journal article (https://doi.org/10.3390/w12113267) This USGS data release contains all of the input and output files for the simulations described in the associated journal article (https://doi.org/10.3390/w12113267).
|Title||Webb and Rosenberry, 2020, MODFLOW 2005 and MODPATH 5 model data sets used to evaluate seepage-meter efficiency in high-permeability settings|
|Authors||Richard M Webb, Donald O Rosenberry|
|Product Type||Data Release|
|Record Source||USGS Digital Object Identifier Catalog|
|USGS Organization||Earth System Processes Division|