Point Flow Analysis Software for the Lower South Platte River

• Description: User Guide: Point Flow Module & Querying & Charting Module
• State: CO
• Basin: South Platte
• Water Division: 1
• Date: 12/1/1994
• Author: Northern Colorado Water Conservancy District
• Title: User Guide for the Point Flow Analysis Software for the Lower South Platte River Kersey to Julesburg
• Water Supply Pro - Doc Type: Report/Study

OUTPUT DATA TABLES FOR THE LOWER SOUTH PLATTE RIVER (INPUT TABLES
TO Q &CM)
As illustrated in Figure 4, tables gainout.dbf and flowout.dbf are created by the Point Flow Software in
the case of the Lower South Platte River. The file names were defined as part of the User's input
necessary in the PFM. Descriptions of these tables are as follows.
Subreach Gains Table (gainout.dbf). As the name implies, gainout.dbf stores the computed subreach
gains in the units of cfs per river mile for the Lower South Platte River. The number of fields
included in gainout.dbf is equal to the number of subreaches existing within a defined river segment
(number of nodes minus one) plus a date field. The first field, REPORTDATE, stores the
temporal identification of the computed gains. REPORTDATE is a 'date' type field. The
remainder of the fields, in river mile order, have field names that identify the subreach for which
they refer and are defined as being of a 'numeric' type having a length of seven characters and
decimal precision of one. These field names are a concatenation of the first four characters of the
structure code name directly above the subreach with the first four characters of the structure
code name directly below the subreach. An underscore (_) appears between the two 4 - character
codes, resulting in field names having nine characters. For example, the first two structures
considered in the Lower South Platte River point flow study are the Kersey gauge
(KERSGAUGGG) and Crow Creek (CROWCRKICI). The name of the field within gainout.dbf
which holds the computed subreach gain for a particular day is KERS_CROW.
River Flows Table (flowout.dbh. The computed river flows directly above and below each node in the
Lower South Platte River are output from the PFM to the flowout.dbf database. The number of
fields residing in flowout.dbf (created by the Point Flow Software) is equal to twice the number of
defined subreaches plus a date field. Similar to all other tables, the first field, REPORTDATE,
stores the calendar date for which the river flows are computed. The remainder of the fields
describe the flow in the river channel. The field names are a concatenation of the seven character
' structure code and a two character suffix. The suffix describes whether the field is in reference to
flow directly up river from the node or directly down river of the node. The suffix, therefore, is
either 'UP' (representing up river) or 'DW' (representing down river). The structure code and the
two character suffix are separated by a single underscore U. The first structure and the last
structure within a defined river segment (usually gauging stations) only have one associated field
each within flowout.dbf. The PFM calculates only the flow directly down river of the first structure,
' and only the flow directly up river of the last river segment structure. Using the Crow Creek
example, the fields CROWCRK UP and CROWCRK_DW are created by the Flow /Gain
' Software and store numerical values which represent the flow (in cfs) at locations directly up river
and directly down river from Crow Creek.
27 ptflguid.wpd