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World of Shareware - Software Farm 2
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GENERAL
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ALLWET.ZIP
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CHAP1.SML
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1986-09-06
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1 INTRODUCTION
The computer program ALLWET enables engineers and planners to determine
the adequacy of an existing or proposed water distribution system, the effects
upon a system of new demands, and the adequacy of proposed design changes to a
system. Input data includes a description of the nodes, pipes, nodal demands,
valves, pumps and sources within the system.
ALLWET may be used in batch or interactive mode. In batch mode, ALLWET
first reads the system description from a disk file, then performs the
analysis (i.e., calculates the nodal pressures and pipe flows within the
system), and finally outputs the results to another file or to a high speed
line printer. In interactive mode, ALLWET reads the data from a disk file.
While at an interactive terminal, the user may (i) generate full or partial
listings of the input data, (ii) revise the data, (iii) perform analyses, (iv)
list full or partial analysis results, (v) direct full listings of input data
and analysis results to a remote job entry terminal, and (vi) permanently
store the revised data set.
ALLWET permits four types of demands at each node and multiplicative
factors for each demand type. In this way the effects of diurnal variations
in flow patterns may be studied.
In calculating pipe flows and nodal pressures, ALLWET sets up and
iteratively solves a system of nonlinear equations.
Chapter 2 describes the elements of a water distribution as viewed by
ALLWET. Chapter 3 describes the preparation of data decks for ALLWET. All
ALLWET users should be familiar with these two chapters. Chapter 4 instructs
interactive users how to access ALLWET, and describes the complete command
language for interactive use of ALLWET. Those intending to use ALLWET only in
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a batch environment may skip this chapter. Chapter 5 explains batch use of
ALLWET. Chapter 6, also important to all users, describes the interpretation
of successful and the occasional unsuccessful ALLWET analyses.
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