ISSN:1747-6585    

DOI:10.1111/j.1747-6593.1988.tb01279.x

出版商:Blackwell Publishing Ltd    

年代:1988

数据来源: WILEY

ISSN:1747-6585    

DOI:10.1111/j.1747-6593.1988.tb01280.x

出版商:Blackwell Publishing Ltd    

年代:1988

数据来源: WILEY

ISSN:1747-6585    

DOI:10.1111/j.1747-6593.1988.tb01281.x

出版商:Blackwell Publishing Ltd    

年代:1988

数据来源: WILEY

ISSN:1747-6585    

DOI:10.1111/j.1747-6593.1988.tb01282.x

出版商:Blackwell Publishing Ltd    

年代:1988

数据来源: WILEY

ISSN:1747-6585    

DOI:10.1111/j.1747-6593.1988.tb01283.x

出版商:Blackwell Publishing Ltd    

年代:1988

数据来源: WILEY

ISSN:1747-6585    

DOI:10.1111/j.1747-6593.1988.tb01284.x

出版商:Blackwell Publishing Ltd    

年代:1988

数据来源: WILEY

摘要:

ABSTRACTSprings from acatchment to the north east of Bath to provide up to 80 per cent of the water supply to a population of 96 000. A review in 1984 suggested that within a few years nitrate concentrations in these sources could exceed the limit for drinking water (11.3 mg N/1). Nitrate was being leached from agricultural land and when an opportunity arose to alter the largely arable farming on part of the catchment, guidelines were devised to reduce nitrate leaching. This paper describes the guidelines and the effects of their implementation.

ISSN:1747-6585    

DOI:10.1111/j.1747-6593.1988.tb01285.x

出版商:Blackwell Publishing Ltd    

年代:1988

数据来源: WILEY

摘要:

ABSTRACTFaced with acontinuing growth in demand and the need to replace a large part of London's ageing water supply system, Thames Water have devised an integrated strategy for future water supply to the capital. At the core of this strategy is the construction of over 60 km of deep tunnel (the London Water Ring Main) to convey water to the capital's major demand centres. The ring main will radically alter the way in which water is supplied to London, and a considerable amount of analytical work has been necessary to develop proposals and an operating system.

ISSN:1747-6585    

DOI:10.1111/j.1747-6593.1988.tb01286.x

出版商:Blackwell Publishing Ltd    

年代:1988

数据来源: WILEY

ISSN:1747-6585    

DOI:10.1111/j.1747-6593.1988.tb01287.x

出版商:Blackwell Publishing Ltd    

年代:1988

数据来源: WILEY

摘要:

SYNOPSISAstudy ofa guinea worm epidemiology in South Kordofan, Sudan, found two different patterns of infection. In four villages, all with large open reservoirs (hafirs), the one‐year period prevalence was over 34 per cent, and was not strongly related to age. In the remaining 23 villages, the prevalence did not exceed 20 per cent but was greater in adults than in children. The former pattern suggested contamination of the water carried home, while the latter appeared to be associated with casual use of water sources outside the village. Guinea worm disease was associated with the use of certain water sources, particularly in the poorly‐maintained hafirs, but not with hand pumps, when these functioned, or open dug wells. In this context, open dug wells seem to be a more cost‐effective intervention for guinea worm control than boreholes with hand pumps or the rehabilitation of h

ISSN:1747-6585    

DOI:10.1111/j.1747-6593.1988.tb01288.x

出版商:Blackwell Publishing Ltd    

年代:1988

数据来源: WILEY