| Abstract: | Lake Belle Taine (480 ha) in north central Minnesota receives on average 76,000 m3 d-1 of water from Little Sand Creek but has no outlet. Water seeps out of the lake, flows through glacial outwash, and discharges into three nearby lakes with stages 13-14 m lower than Belle Taine. Seepage-meter data indicate water is seeping out of Belle Taine at velocities up to 263 cm d-1. Hydraulic-head measurements made in the lake bed indicate the sediments are unsaturated beneath a portion of the lake edge, and a wedge of unsaturated sediments extends beneath the lake bed as much as 20 m from the shoreline. At the shoreline the water table is as much as 6.7 m below the lake surface. Modeling results of a similar hypothetical setting indicate that the horizontal extent of an unsaturated zone beneath a lake depends on (1) the permeability contrast between the outwash and the lake bed, (2) anisotropy, (3) lake bed slope, and (4) thickness of the lower-permeability lake bed sediments. Although rarely documented, unsaturated sediments beneath a lake may not be extremely uncommon. Similar, much smaller unsaturated-zone areas also have been observed beneath two other lakes in Minnesota. |
| Genre: | Article |
| ProdID: | 70022405 |
| Citation Author: | Rosenberry, D. O. |
| Citation Contributing Office: | |
| Citation Datum: | |
| Citation Day: | |
| Citation Edition: | |
| Citation Editor: | |
| Citation End Page: | 3409 |
| Citation Issue: | 12 |
| Citation Keywords: | |
| Citation Language: | English |
| Citation Larger Work Title: | Water Resources Research |
| Citation LatN: | |
| Citation LatS: | |
| Citation LonE: | |
| Citation LonW: | |
| Citation Month: | |
| Citation No Pagination: | |
| Citation Number Of Pages: | 9 |
| Citation Online Only Flag: | |
| Citation Phsyical Description: | |
| Citation Projection: | |
| Citation Public Comments: | |
| Citation Publisher: | |
| Citation Series: | |
| Citation Series Code: | |
| Citation Series Number: | |
| Citation Search Results Text: | Unsaturated-zone wedge beneath a large, natural lake; 2000; Article; Journal; Water Resources Research; Rosenberry, D. O. |
| Citation Start Page: | 3401 |
| Citation Volume: | 36 |
| Citation Year: | 2000 |
| Type: | citation/reference |
| Text: | Unsaturated-zone wedge beneath a large, natural lake; 2000; Article; Journal; Water Resources Research; Rosenberry, D. O. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DIGITAL OBJECT IDENTIFIER): | http://dx.doi.org/10.1029/2000WR900213 |
| Date Other: | Sat, 1 Jan 2000 00:00 -0600 |
| Publisher: | |
