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

LI
240
MSTJR_64PR
D
8
N/A
241
MSTJR_64AM
N
6
1
242
MNMOSTJR64
L
1
N/A
243
CLFR64UP_
D
8
N/A
The layout of Table 3 is similar to that of Table 2 with the exception of the field number column.
The field number value represents the ordering of the fields within comm_dly.dbf. A brief
description of each of the Field Names shown in Table 3 can be found in the DEFINITION field
of the cntrltbl.dbf table (see Appendix II).
1 The methodology for calculating point flows for the Lower South Platte River incorporates
information defining the 'drying points' along the river. Appendix I presents a bar chart depicting
the location and frequency of such 'drying points' as noted by the River Commissioners in
Districts 1 and 64 throughout the 13 year historical study period (1981 - 1993). In viewing
Appendix I it is important to bear in mind that 'drying point' information is not always recorded
by a River Commissioner. In many instances a River Commissioner visits only the structure
' measuring a river diversion (flume). Such measuring structures may be several miles from the
river's main stem making it infeasible to visit every diversion structure that may be diverting the
entire river (drying point) every day.
State's River Diversion Records (histdiv,M). The Colorado Division of Water Resources maintains
historical records regarding all water diversions from the Lower South Platte River on a daily
basis. In most instances, the values recorded by the State are the result of day - averaging the flow
values which were originally measured on a continuous basis (i.e. strip chart recorder). Note that
for periods in which diversion flows fluctuate significantly over a 24 -hour time period, the values
recorded by the State represent a higher degree of accuracy than the instantaneous values
recorded by the River Commissioner's (see previous subsection). A sample of the State's River
Diversion Records can be found in Appendix III.
The historical diversion values maintained by the Division of Water Resources are classified not
only by structure, but are further categorized by the type of water diverted (i.e., water coloring).
Extensive coloring for source of water and use of water is done in the State's River Diversion
Records. This extensive coloring is not needed for a point flow study where only total diversion
from the river at each structure is required. All applicable water color types were combined with
the resulting total daily diversion values used in the histdiv.dbf database. The field names included
in histdiv.dbf are listed in Table 4. With the exception of the field REPORTDATE, which stores
the calendar date corresponding to all flow values stored in subsequent fields, all of the fields in
Table 4 represent specific structures. The full name of the structures affiliated with the
FIELDNAME codes can be interpreted from the Control Table (see Appendix II). Notice that
the last three code letters of most of the FIELDNAME fields representing a structure are
identical (DDO). Referring to Figure 4, it follows that these code letters can be decoded as:
Diversion (Structural Type), histDiv.dbf (Information Source), and Qutflow (Information Type).
The remaining three FIELDNAME fields (Field # 10, 12, and 24) portray an inflowing structure
23 ptflguid.wpd