ISSN:0303-6936    

DOI:10.1080/02626667709491699

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

摘要:

A short description is given of the structure of the integrated catchment modelEGMO, the flow components considered, the basic principles of the sub-models, and the procedure of the main program.

ISSN:0303-6936    

DOI:10.1080/02626667709491700

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

摘要:

The U.B.C. Watershed Model is being used operationally for forecasting daily streamflows in 13 sub-basins of the Fraser River system which is subject to snowmelt floods from the mountain snow-packs of the Coast, Columbia and Rocky Mountains in British Columbia. The model has also been tested and adopted by the Prairie Provinces Water Board for mountain snowmelt forecasting in the Saskatchewan River system headwaters.

ISSN:0303-6936    

DOI:10.1080/02626667709491701

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

摘要:

A model detecting the stability of the amplitude and phase of periodic components provides information on the disturbances which may have influenced the formation of sequences within the period of observation. The model is applied in combination with a model to detect the most frequent periodicities.

ISSN:0303-6936    

DOI:10.1080/02626667709491702

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

摘要:

Existing models for generating synthetic daily streamflow data are unsuitable for reproducing the predominant features of daily flows, the rising and recession of flood flows, the peaks of the floods, the volume of the waves and the range. In this paper, a model is presented which is able to reproduce the important features of daily flows. In the model the measured record of daily data is assumed to be the output of a linear system. The input of the system consists of pulses, occurring on certain days. The pulses are convoluted with the system function in order to produce the output. The form of the system function depends on the magnitude of the output. First, the days on which pulses occur, the magnitude of pulses, and the form of the system function as a function of the system output, are determined. Subsequently, a model was developed for the generation of the pulses. The model consists of a combination of two processes. Using a Markov chain model, the sequence of dry and wet days (days with and without pulses) is generated. Thereafter, a pulse of certain magnitude is assigned to each wet day. A modified first-order autoregressive process is used to produce these correlated pulses. The random components of the pulses are taken from a transformed exponential distribution. The periodicity of the flows within the year is reproduced by using different model parameters for each month of the year. The model yields good results for small and medium size basins, especially as far as peak flows, the volume of the waves, and the range are concerned. A sequence of daily flows from at least 20 years is required for input data.

ISSN:0303-6936    

DOI:10.1080/02626667709491703

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

摘要:

Because the CEQUEAU hydrophysiographic model is able to simulate natural or modified discharges simultaneously in time and space, it is suited to multiple applications. By using such a model, one can study the hydrological repercussions, all over a basin, resulting from natural or man-made modifications to its characteristics. For instance, the various effects originating from the site, type and characteristics of intended dams (flood control, diversion, storage, etc.) can be simulated with satisfaction. Moreover, the model provides the basic hydrological data required for design purposes. The effect of deforestation on floods produced by snowmelt can be simulated at any point in a basin. Flood risk mapping is also an application for which the model can be very useful.

ISSN:0303-6936    

DOI:10.1080/02626667709491704

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

摘要:

The paper describes the development of a method which enables formulation of reservoir operation rules in a multi-reservoir water resources system. The method consists of three major steps: (1) development of a mathematical model of a multivariate (time and space) river flow process and generation of a synthetic input to the system, (2) development of a mathematical model of a water resources system and the simulation of its operation over the whole period of synthetic inflows (simulation coupled with one of the mathematical programming techniques), and (3) statistical analysis of the results of the simulation-optimization computations. Consecutive implementation of all steps leads to the formulation of the operation rules for all the reservoirs in the system.

ISSN:0303-6936    

DOI:10.1080/02626667709491705

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

ISSN:0303-6936    

DOI:10.1080/02626667709491706

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

ISSN:0303-6936    

DOI:10.1080/02626667709491708

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

ISSN:0303-6936    

DOI:10.1080/02626667709491709

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor