9584

• UCREFRP Catalog Number: 9584
• Author: U.S. Fish and Wildlife Service.
• Title: Draft- Aspinall Unit Operations Study.
• USFW Year: 1988.
• USFW - Doc Type: \
• Copyright Material: NO

NETWORK FILES
The network file furnishes HYDROSS with a physical description of
the study area: how the stations connect, physical facilities
(reservoirs, power plants, canal capacities, etc.), and supply
requirement locations (for diversions, instream flow requirements,
return flow points, etc.). The connection to the operational
parameters is through the use of table numbers, which are then
used as pointers to the data in the table file.
TABLE FILES
The table file is the mechanism for introducing operational
parameters to the model. The two types of tables are monthly
(type 0) and parameter/function (type 1). Monthly tables contain
data which are constant for a given month, but may vary from month
to month and year to year. Each table record represents one year,
and requires twelve entries (one for each month). Tables may be
fixed (one table record for the entire study) or staged (a
different table record for each year). For staged tables, HYDROSS
uses the latest table at or before the year under consideration,
and a table for each year of the study is not needed.
FLOW FILES
Flow data is introduced into the model by the means of a natural
flow data base file which is read by the computation program. The
flow data is the pristine monthly flow at each headwater station
and at intermediate locations. In practice, the gaging station
flow for a given historical period will include the effect of any
man-made improvements existing at the time, and must be adjusted
to reflect natural flows.
DEVELOPMENT OF RESERVOIR DATA
TAYLOR RESERVOIR
The first step in developing the simulation was building the
network which ties the river system together. After studying the
CRSS network, a HYDROSS network was devised that also started with
a headwater node above Taylor Reservoir. The first station in the
network is a station which represents natural inflow to Taylor
Reservoir. Flow data for this point was derived from the CRSS
natural flow data base which is converted to a HYDROSS format by
programs developed by the Service.
Physical Data
The next station in the network is Taylor Reservoir which is
modeled using data provided by the Bureau. The operation was
simulated using the following table and physical parameters.
2