摘要:

The authors give data of water infiltrations in horizontal and vertical columns, and in a two dimensional model. The soils are two mixtures of sand and loam, and a natural sandy loam. The characteristics of these soils are given in the article.

ISSN:0020-6024    

DOI:10.1080/02626666909493723

出版商:Taylor & Francis Group    

年代:1969

数据来源: Taylor

摘要:

The equations of Brooks and Corey for relating effective saturationSeto capillary pressurepedescribe experimental data quite well for small values ofSebut overestimatepeasSeapproaches unity. Using assumed functions for the distribution of pore volume with respect to pore radius, Brutsaert was able to describe experimental data satisfactorily provided that constants such as mean pore radius and the standard deviation of pore radius were determined from distribution functions derived from experimental data rather than from the assumed functions. White developed a mathematical model which described experimental data ofS(pe) satisfactorily but the technique required the determination of thirteen constants describing the relationship.

ISSN:0020-6024    

DOI:10.1080/02626666909493724

出版商:Taylor & Francis Group    

年代:1969

数据来源: Taylor

摘要:

A series of experiments were conducted on vertical columns of soil in which periodic applications of water were applied to the surface, separated by redistribution processes. The variations of hydraulic head and water content along the column were measured.

ISSN:0020-6024    

DOI:10.1080/02626666909493725

出版商:Taylor & Francis Group    

年代:1969

数据来源: Taylor

摘要:

Various models were proposed for giving the value of the storage coefficient from field measurements of piezometric levels, rainfall, geophysical and granulometric characteristics obtained during pump tests in the alluvionnal aquifer of the Rhin valley.

ISSN:0020-6024    

DOI:10.1080/02626666909493726

出版商:Taylor & Francis Group    

年代:1969

数据来源: Taylor

摘要:

The concept of the specific yield as it is applied to unconfined aquifers, is discussed, and it is shown that the value of the true specific yield is generally a function of both horizontal position and time. Because of the difficulties associated with the measurement of localised fluxes and localised water-table movements necessary to obtain values of the true specific yield, theaverage, thebulkand thevirtualspecific yields are defined, all of which are just time dependent and the last two of which require the measurement of average fluxes over the catchment area. The non-constancy of the specific yield is illustrated in experimental results obtained with intermittent rainfall over a drainage installation where negative values were obtained, reaching ±∞ when the water-table height was a maximum or minimum.

ISSN:0020-6024    

DOI:10.1080/02626666909493727

出版商:Taylor & Francis Group    

年代:1969

数据来源: Taylor

摘要:

An attempt has been made to consider as a whole the flow of water in both saturated and unsaturated zones. It is indeed clear that the position of the water table, when considering the hydrodynamics of free surface aquifers, must be controlled by the flow occuring in the unsaturated zone (evaporation, recharge, etc…).

ISSN:0020-6024    

DOI:10.1080/02626666909493728

出版商:Taylor & Francis Group    

年代:1969

数据来源: Taylor

ISSN:0020-6024    

DOI:10.1080/02626666909493729

出版商:Taylor & Francis Group    

年代:1969

数据来源: Taylor

ISSN:0020-6024    

DOI:10.1080/02626666909493730

出版商:Taylor & Francis Group    

年代:1969

数据来源: Taylor

ISSN:0020-6024    

DOI:10.1080/02626666909493731

出版商:Taylor & Francis Group    

年代:1969

数据来源: Taylor

ISSN:0020-6024    

DOI:10.1080/02626666909493732

出版商:Taylor & Francis Group    

年代:1969

数据来源: Taylor