ISSN:0303-6936    

DOI:10.1080/02626667709491742

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

ISSN:0303-6936    

DOI:10.1080/02626667709491743

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

ISSN:0303-6936    

DOI:10.1080/02626667709491744

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

ISSN:0303-6936    

DOI:10.1080/02626667709491745

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

摘要:

The application of dilution gauging techniques to natural streams and other variable flows incurs a systematic error caused by the change in discharge with time. On the recession limb of a hydrograph the change is usually smooth and gradual, and errors can be expected intuitively to be small. In a preceding paper the author investigated errors arising from this cause in the case of a constant rate tracer injection, and developed formulae for the calculation of bias from known values of the recession constant and the distribution of residence time in the gauging reach. This paper extends the theory of the residence time model to the case of a dilution gauging by the integration method, and presents analogous formulae for the errors.

ISSN:0303-6936    

DOI:10.1080/02626667709491746

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

ISSN:0303-6936    

DOI:10.1080/02626667709491747

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

摘要:

A curve-fitting method is described to determine the storage coefficient and transmissivity of an extensive confined aquifer.

ISSN:0303-6936    

DOI:10.1080/02626667709491748

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

摘要:

The drought event which reached severe levels in 1972 and 1973 caused a major disaster in the Sahalian and sub-Sahalian zones in Africa. This disaster has drawn attention to the need for data surveys and detailed studies for meaningful long-term measures to combat the effects of future droughts.

ISSN:0303-6936    

DOI:10.1080/02626667709491749

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

摘要:

The problem of stratified groundwater flow (salt water intrusion) is considered in the general case where the hydrological boundaries can have any shape and the impervious bed can have any configuration. The recharge and discharge can also be considered according to any given function of time. The fluid density is assumed to be constant throughout each layer. The effect at the boundaries is considered, whether these are a river or a continuation of the aquifer with different parameters.

ISSN:0303-6936    

DOI:10.1080/02626667709491750

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

ISSN:0303-6936    

DOI:10.1080/02626667709491751

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor