ISSN:0303-6936    

DOI:10.1080/02626667709491689

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

ISSN:0303-6936    

DOI:10.1080/02626667709491690

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

ISSN:0303-6936    

DOI:10.1080/02626667709491691

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

ISSN:0303-6936    

DOI:10.1080/02626667709491692

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

摘要:

A historical review of the US Geological Survey's streamgauging programme illustrates the persistent impact that some events, which may be considered as random, have had on the programme. Selection of gauging policy and strategy as an integral part of programme planning (network design) is abetted by benefit-cost analysis.

ISSN:0303-6936    

DOI:10.1080/02626667709491693

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

摘要:

The 21.4-km2clay catchment of the Canon's Brook was built over during the period 1953–1968. By 1968 16.6 per cent of its area was paved and these impervious surfaces drained to the river by means of surface water sewers. Records of rainfall and runoff have been taken since 1950, i.e. before development began, and quantìtative description by double mass analysis revealed an increased water yield from the catchment as urbanization progressed. The median flow from 1950 to 1953 was around 0.057 m3/s and this had been increased by urbanization to about 0.142 m3/s in 1968. The precise extent of increased water yield and its reflection in the flow regimen were derived from a computer simulation model. This was calibrated on the records for 1950–1953 and then the flow from an unchanged rural catchment was simulated for the period of urban development, 1953–1968. The difference between the gauged urban water yield from a 15 per cent paved catchment and its simulated rural equivalent averaged 59.4 mm per annum or about 30 per cent of the runoff from the rural catchment.

ISSN:0303-6936    

DOI:10.1080/02626667709491694

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

摘要:

This paper describes the patterns of groundwater occurrence in the arid zones of the Soviet Union. The authors show the influence of mountain structures on the vertical and horizontal hydrochemical zonality.

ISSN:0303-6936    

DOI:10.1080/02626667709491695

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

摘要:

Regional planning implies rational utilization of water resources. This depends on the exact knowledge of fluctuations of river flow and, particularly, computations of very exceptional discharges, these data being necessary when planning civil engineering features for developments in valleys.

ISSN:0303-6936    

DOI:10.1080/02626667709491696

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

摘要:

Knowledge of the natural resources of a country is essential for the assessment of its development possibilities. This is particularly true for the evaluation of groundwater resources in a country like Uruguay, where less than 5 per cent of the potential is exploited and this in an inefficient way, and where no drastic future increase in demand is predicted.

ISSN:0303-6936    

DOI:10.1080/02626667709491697

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

摘要:

A simple guide (shown in the appendix) is produced, which enables a water manager or engineer to make an estimate of statistics of water equivalent of snow cover for return periods between 5 and 100 years for most places in the United Kingdom. This paper describes how the guide was produced using many different sources of data. The methods described here will be of help to both meteorologists and hydrologists in temperate countries with similar snow questions.

ISSN:0303-6936    

DOI:10.1080/02626667709491698

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor