摘要:

The current state of kriging in subsurface hydrology is critically reviewed. In an application to a region where boreholes already exist, methods of optimal location of additional observation wells for geophysical parameter investigation and optimal interpolation for the purpose of solving the inverse problem are investigated. The particular case of the location of wells for the measurements of transmissivity and hydraulic head in the Kennet Valley Chalk aquifer, UK, is examined. Results of interpolation of measured hydraulic conductivity values by kriging are compared with results from a standard graphical package for interpolation. Reference is also made to the distribution obtained by the inverse method (in which the conductivity distribution is obtained from the head distribution). On the basis of the application, the conditional simulation (in which the generated data are both consistent with field values and the field statistical structure) is deemed to be the best. It is also found that different methods of interpolation give widely different distributions in the case of hydraulic conductivity. It is suggested that the kriged map or conditional map of the transmissivity should serve as the basis for regional discretization to which corrections via the inverse model may be made.

ISSN:0262-6667    

DOI:10.1080/02626668409490957

出版商:Taylor & Francis Group    

年代:1984

数据来源: Taylor

摘要:

A stochastic model is proposed to describe flood-induced changes in cross sections of ephemeral streams with coarse bed-material. The model is based on the assumption that the real process can be described as a marked point process. The cumulative distribution functions of both the total change in a fixed interval of time and the maximum scour in the same period were examined. The model was run, using Monte Carlo techniques, with field data obtained from a small stream in southern Italy.

ISSN:0262-6667    

DOI:10.1080/02626668409490958

出版商:Taylor & Francis Group    

年代:1984

数据来源: Taylor

摘要:

As the northern third of the country lies above the Tropic of Capricorn, Australia has a large area subjected to tropical influences. Northern Australia and neighbouring Papua New Guinea provide considerable contrasts hydrologically. The meteorological and climatological reasons for producing one of the most variable rainfall and runoff regimes in the world (in Australia) and one of the wettest and least variable regimes (in Papua New Guinea) are discussed. The spatial distribution and variability of rainfall, evaporation and runoff (streamflow) are considered in relation to the seasonal rainfall-producing mechanisms (including tropical cyclones in the case of Australia) and topography (which is a controlling influence in Papua New Guinea). Practical needs for determining hydrological characteristics in the region are outlined together with an assessment of the status of hydrology with respect to these needs. Current applications to water resources development and management are discussed.

ISSN:0262-6667    

DOI:10.1080/02626668409490959

出版商:Taylor & Francis Group    

年代:1984

数据来源: Taylor

摘要:

An infiltration model based on the Green-Ampt assumptions is developed for a class of non-uniform soils in which saturated hydraulic conductivity decreases as an exponential function of depth, and the storage-suction factor C = ΔθΔΨ is a constant. An analysis of measured hydraulic conductivity and porosity data suggests that the model may be useful in some soils where the changes of hydraulic characteristics with depth are of this form. A method for using the model with time variable rainfall rates is given. The model is applied to simulate the experimental results of Childs & Bybordi (1969) who measured infiltration into layered sand profiles. Agreement was satisfactory even for this case.

ISSN:0262-6667    

DOI:10.1080/02626668409490960

出版商:Taylor & Francis Group    

年代:1984

数据来源: Taylor

ISSN:0262-6667    

DOI:10.1080/02626668409490961

出版商:Taylor & Francis Group    

年代:1984

数据来源: Taylor

ISSN:0262-6667    

DOI:10.1080/02626668409490962

出版商:Taylor & Francis Group    

年代:1984

数据来源: Taylor

ISSN:0262-6667    

DOI:10.1080/02626668409490963

出版商:Taylor & Francis Group    

年代:1984

数据来源: Taylor

ISSN:0262-6667    

DOI:10.1080/02626668409490964

出版商:Taylor & Francis Group    

年代:1984

数据来源: Taylor

ISSN:0262-6667    

DOI:10.1080/02626668409490965

出版商:Taylor & Francis Group    

年代:1984

数据来源: Taylor

ISSN:0262-6667    

DOI:10.1080/02626668409490956

出版商:Taylor & Francis Group    

年代:1984

数据来源: Taylor