摘要:

A consequence of urban development in a basin is the increase of peak discharge and surface flow which may cause flooding. Main channel design has to take into account future city development. A mathematical conceptual rainfall-runoff model was developed in order to simulate an urban basin at Porto Alegre (Brazil). The model has four algorithms: depression, interception losses, soil storage, basin routing and channel routing. Based on the Urban Development Master Plan, some of the model parameters were modified and evaluated, and a preliminary assessment of the effect of urbanization on flow hydrographs was made.

ISSN:0262-6667    

DOI:10.1080/02626668409490930

出版商:Taylor & Francis Group    

年代:1984

数据来源: Taylor

摘要:

Hydrology is considered in the context of the solar system, the water-related cycles of geophysics, the human environment, and international scientific cooperation. Global water balances and dynamic hydrological models are briefly described. The existence of different levels of description of hydrological phenomena is referred to and recent attempts to formulate hydrological laws at basin scale briefly reviewed.

ISSN:0262-6667    

DOI:10.1080/02626668409490931

出版商:Taylor & Francis Group    

年代:1984

数据来源: Taylor

摘要:

This paper describes a study for groundwater recharge estimation in the Sabarmati basin, western India, by means of the tritium tagging method. The estimation of areal average recharge for the basin from the point recharge estimates obtained at various field stations is discussed. A considerable variability of recharge estimates is observed at nearby locations having apparently similar conditions of soil and climate. In spite of the observed spatial variability in recharge estimates, data from the tritium tagging experiment in combination with conventional hydrogeological information (i.e. grain size, water level of the unconfined aquifers and other geological information) enable us to divide the alluvial parts of the basin into three recharge zones. On an average basis, about 14% of the precipitation input is estimated to be recharged annually in the alluvial parts of the Sabarmati basin.

ISSN:0262-6667    

DOI:10.1080/02626668409490932

出版商:Taylor & Francis Group    

年代:1984

数据来源: Taylor

摘要:

The paper summarizes investigations made into regulation of the White Nile during Phase III of the WMO/UNDP Hydrometeorological Survey of the catchments of Lakes Victoria, Kyoga and Mobuto Sese Seko. A number of historical regulation plans were evaluated using the mathematical model developed by the project. A series of new plans was devised to provide benefits to the riparian countries although, due to lack of data, economic and ecological effects were not included.

ISSN:0262-6667    

DOI:10.1080/02626668409490933

出版商:Taylor & Francis Group    

年代:1984

数据来源: Taylor

摘要:

Two single input stochastic models of the type proposed by Box & Jenkins were applied to sediment yield data from an experimental basin in the USA. The models were fitted to a calibration set of eight events and then applied to predict and simulate sediment yield for four sets of events. The results so obtained supported the adaptability of these models to real time forecasting schemes and provided some information about the dependency of sediment yield on rainfall and runoff rates.

ISSN:0262-6667    

DOI:10.1080/02626668409490934

出版商:Taylor & Francis Group    

年代:1984

数据来源: Taylor

摘要:

The rainstorm of 1–5 July 1941 which caused exceptionally heavy rains over the coastal belt of north Konkan-south Gujarat has been analysed. The centre of this rainstorm was at Dharampur (Surat district of Gujarat state) which recorded the highest one-day rainfall of 987 mm on 2 July 1941. The areal rain depths obtained from this rainstorm for durations of one to three days over different sized areas were found to exceed the highest areal rain depths obtained in India. A comparison of areal rain depths for this rainstorm with similar rain depths obtained from the most severe rainstorms of the USA and Australia showed that, barring one or two small areas, the July 1941 rainstorm gave higher rain depths up to an area of 65 000 km2for durations of one to three days. The efficiency of this rainstorm was also determined and found to be the highest among the Indian and American rainstorms. Considering this, the July 1941 rainstorm may be considered as one of the world's most severe rainstorms.

ISSN:0262-6667    

DOI:10.1080/02626668409490935

出版商:Taylor & Francis Group    

年代:1984

数据来源: Taylor

ISSN:0262-6667    

DOI:10.1080/02626668409490936

出版商:Taylor & Francis Group    

年代:1984

数据来源: Taylor

ISSN:0262-6667    

DOI:10.1080/02626668409490937

出版商:Taylor & Francis Group    

年代:1984

数据来源: Taylor

ISSN:0262-6667    

DOI:10.1080/02626668409490938

出版商:Taylor & Francis Group    

年代:1984

数据来源: Taylor

ISSN:0262-6667    

DOI:10.1080/02626668409490939

出版商:Taylor & Francis Group    

年代:1984

数据来源: Taylor