Request for Proposal Platte River Channel Dynamics Study

• Description: Draft Final
• Date: 2/5/2001
• Water Supply Pro - Doc Type: Report/Study

River. The review should identify where certainties conclusions are drawn and
uncertainties exist. Where, the reliability of those conclusions should be
identified. Issues to be addressed should include:
• Quality, reliability, sensitivity, or confidence relative to data
identified in Task 1.
• Factors (and their significance) that influence channel width,
sediment supply, sediment transport, and vegetative encroachment
in and along the central Platte River.
• Macro - historic (hundreds to thousands of years) natural variability
of channel width, sediment supply, sediment transport, and
vegetative encroachment, and/or macro - historic natural variability
of the factors that influence channel width, sediment supply, flow
conditions, sediment transport, and vegetative encroachment;
including a comparison of how current status and trends compare
to natural variability.
• Status of channel width, sediment supply, sediment transport, and
vegetative encroachment, and/or status of the factors that influence
channel width, sediment supply, sediment transport, and vegetative
encroachment, prior to settlement and development of the Platte
River Basin.
Changes in channel width, sediment supply, sediment transport,
and vegetative encroachment, and changes in the factors that
influence channel width, sediment supply, flow conditions,
sediment transport, and vegetative encroachment since settlement
and development; including data that supports or refutes those
changes.
Potential geomorphologic or vegetative consequences, if any, of
the Proposed Program as it is currently formulated, and the
likelihood of those consequences (included likely amount of time
necessary for such consequences to develop).
Potential geomorphologic or vegetative consequences of adding
sediment (including in any quantity and manner proposed in the
EIS Team products) under current flow conditions and under flow
conditions of the Proposed Program (this evaluation may require
assessing any potential impacts below Chapman).
It is permissible, for each of the above issues, for the Consultant to conclude that
existing information supports specific conclusions or a range of conclusions. It is
also appropriate for the Consultant to conclude that insufficient information
currently exists to support a conclusion on any of the above issues.
Task 4. Develop Framework for Further Addressing SedNe Issues
The Consultant should identify and describe potential future work tasks that could
be undertaken to improve our understanding of channel narrowing or deepening,