1400 ‎(2)‎

• UCREFRP Catalog Number: 1400
• Author: Simons, D. B., et al., ed.
• Title: Proceedings
• USFW Year: 1980.
• USFW - Doc Type: Workshop on Downstream River Channel Changes Resulting From Diversions or Reservoir Construction.
• Copyright Material: NO

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Outflow rates of the reservoir
Geometry of the reservoir
Water transparency to solar radiation
Water temperature
Time and periods of breaking and forming of the ice cover

As with the workshop data packages, the available data will seldom
satisfy the requirements of this data list. However, appropriate
methods of synthesi s can be used to supply necessary data from a
secondary data base. In general, these data can be classified as 1)
data essential to conduct the proposed study, 2) data that are available
on existing records, 3) data that can be synthesized by theory or
extrapolated from adjacent basins, and 4) data that must be collected to
supplement the existing data and proposed synthesized data to add to the
v~lidity and accuracy of the study.

CONCLUSIONS

There was general agreement among the workshop participants
concerning the critical problems and data needs for assessing downstream
channel change. The scope of the analyses provided in the papers which
follow was influenced by the time available for study, the data
provided, and the absence of a site visit to the study area. As a
result participants generally attempted only a qualitative analysis, but
many papers outline procedures for more detailed quantitative studies.

The details of the approaches selected by each participant vary
based on the individual's training and experience. There are, however,
striking commonalities which highlight the state-of-the-art of river
system analysis.

Regime theory and concepts of dynamic equilibrium are used widely
as a basis for qualitative assessment of river response to development.
The concepts of fluvial geomorphology derived from Lane and Schumm are
also pervasive. All participants relied heavily on experience, and many
supplemented their analysis with case study data derived from comparable
physiographic settings. It was generally agreed that hydraulic
engineering projects can induce major changes in the hydrologic,
hydraulic, and sediment regimes of river systems, and at present, theory
alone is not capable of predicting this complex response. Research
effort committed to producing documented case studies can provide an
important resource for evaluating river response. Post-project monitor-
ing and analysis should be supported by agencies responsible for river
system development and control.

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