Показать сокращенную информацию
dc.contributor.author | Kacimov A. | |
dc.contributor.author | Obnosov Y. | |
dc.contributor.author | Perret J. | |
dc.date.accessioned | 2018-09-17T20:22:17Z | |
dc.date.available | 2018-09-17T20:22:17Z | |
dc.date.issued | 2004 | |
dc.identifier.issn | 0022-1694 | |
dc.identifier.uri | https://dspace.kpfu.ru/xmlui/handle/net/133411 | |
dc.description.abstract | Steady and transient 2D Darcian flows in a saturated 'tongue' adjacent to a reservoir are studied analytically. First, a stable tongue receiving water from an inclined equipotential reservoir bed and losing moisture through a phreatic surface is considered. The hydraulic head is governed by the Laplace equation and the complex potential and complex coordinate are determined explicitly by the Polubarinova-Kochina method at an arbitrary bank slopes and evapotranspiration rates. In a particular case of a vertical slope, the tongue becomes a right-angled triangle extending into the layer for the same distance as the Dupuit-Forchheimer model predicts. Second, a saturated Dupuit-Forchheimer flow in the tongue is analyzed under the assumption of evaporation exponentially and linearly decreasing with the depth of a phreatic surface. The corresponding non-linear ordinary differential equation is integrated twice and predicts the length of the tongue as a function of the reservoir water level. Third, a transient regime is modelled by the Boussinesq equation with evaporation uniform in space, but varying cyclostationary with time. A straight-line water table translating upward-downward is found to be located always below the water table for steady regimes with an average evaporation. © 2004 Elsevier B.V. All rights reserved. | |
dc.relation.ispartofseries | Journal of Hydrology | |
dc.subject | Analytic functions | |
dc.subject | Boussinesq equation | |
dc.subject | Dupuit-Forchheimer model | |
dc.subject | Groundwater | |
dc.subject | Hodograph | |
dc.subject | Phreatic surface | |
dc.title | Phreatic surface flow from a near-reservoir saturated tongue | |
dc.type | Article | |
dc.relation.ispartofseries-issue | 1-4 | |
dc.relation.ispartofseries-volume | 296 | |
dc.collection | Публикации сотрудников КФУ | |
dc.relation.startpage | 271 | |
dc.source.id | SCOPUS00221694-2004-296-14-SID3242737492 |