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Platte River Ecosystem Resources and Management, with Emphasis on the Big Bend Reach in Nebraska


List of Tables, Figures and Appendices


Appendices

Appendix A -- Common and scientific names of plants mentioned in text and major plant species in the Platte River Basin.
Appendix B -- List of bird species known to have been observed in the Platte River system of Colorado, Nebraska, and Wyoming.
Appendix C -- Mammal species occurring near river valleys of the Platte River system.
Appendix D -- Fish species in the Platte River system of Colorado, Nebraska, and Wyoming.
Appendix E -- Amphibians and reptiles in the Platte River system in Colorado, Nebraska, and Wyoming.
Appendix F -- Plant species of special concern in the Platte River system of Colorado, Nebraska, and Wyoming.
Appendix G -- Resource Inventory of Platte, South Platte, and North Platte River Habitats.
Appendix H -- Monitoring and Implementation techniques for habitat conservation along the central Platte River, Nebraska.

Tables

Table 1 -- Area (ha) of various land uses by county in central Nebraska.
Table 2 -- Changes in the availability of waste corn on the Platte River study area.
Table 3 -- Mean breeding bird populations by geographic strata indicated on the North American Breeding Bird Survey
Table 4 -- Long-term (1966-1987) trends in continental populations for breeding birds in the Platte River ecosystem.
Table 5 -- Mean breeding populations of prevalent bird families or subfamilies in central Nebraska, 1979-80.
Table 6 -- Population estimates of the most numerous breeding bird species in the central Platte River valley, 1979-1980.
Table 7 -- Federally-listed endangered and threatened species in the Platte River System.
Table 8 -- Nine listed species and critical habitat that occur along the Platte River in Nebraska.
Table 9 -- Category I and II candidate species for federal listing that may be found along the Platte River system in Nebraska.
Table 10 -- Numbers of adult Least Terns and Piping Plovers, percentages of all individual birds using sand pits, and the number of sandbar and sand pit nesting sites on the central and lower reaches of the Platte River, 1988-1991.
Table 11 -- Summary of historical channel widths for Platte River gaging stations.
Table 12 -- Annual and seasonal volumes for the wet, average, and dry hydrographs of the U.S. Fish and Wildlife Service instream flow recommendations.
Table 13 -- Instream flow targets by seasonal priorities for normal (average), wet, and dry years for the central Platte River, Nebraska.
Table 14 -- Pulse flow recommendation for the central Platte River valley ecosystem during May and June.
Table 15 -- Pulse flow recommendation for the central Platte River valley ecosystem during February and March.
Table 16 -- Wet, average, and dry years based upon mean annual flow at Grand Island, 1942-1993.
Table 17 -- Instream flow shortages at Grand Island sorted from highest to lowest and based upon the comparison of each monthly volume with monthly weighted USFWS instream flow recommendations.
Table 18 -- Estimated mean May/June pulse flow shortage at Grand Island compared to the total May and June volume for the wet and average years.
Table 19 -- Instream flow shortages at Grand Island sorted from highest to lowest and based upon the comparison of each daily flow with USFWS instream flow recommendations.
Table 20 -- Mean annual flow depletions that would result from water development proposed in the Platte River system during the past 25 years.
Table 21 -- Approximate land acreages along the central Platte currently owned and managed by conservation agencies and organizations.

Figures

Figure 1 -- Historic and current average daily flow on the Platte River at Duncan, Nebraska, and existing average discharge at Grand Island based upon Opstudy model in FERC (1994b).
Figure 2 -- The development of water storage in the North and South Platte river systems, 1885-1983.
Figure 3 -- Peak flows at overton (1915-1992) and ten-year running average peak flow.
Figure 4 -- Trends in Platte River channel width at U.S. Geological Survey gauging stations.
Figure 5 -- Annual flow and five-year moving mean of annual flow on the Platte River near Overton, Nebraska.
Figure 6 -- The average and median discharge at Grand Island, 1943-1992, and the USFWS instream flow recommendations (IFR).
Figure 7 -- Annualized pulse flow of 9,950 cfs (of 8,300 and 10,800) during five days in May and June superimposed on the recommended flow of 3,000 cfs for 30 days.
Figure 8 -- Water use (million acre-feet) in the upper Platte River basin above Grand Island.
Figure 9 -- Proposed water use change by reducing water consumption by 238,000 acre-feet.
Figure 10 -- Instream flow appropriation proposed by the Nebraska Game and Parks Commision for the central Platte.
Figure 11 -- Average instream flow shortage for each FERC alternative for Kingsley Dam re-licensing.
Figure 12 -- Comparison of FERC alternatives for operating Kingsley Dam and associated facilities in relation to the USFWS's 1994 instream flow target recommendations (IFR).
Figure 13 -- Average monthly shortage of water near Grand Island under various FERC alternatives in the FERC supplemental revised draft environmental impact statement for re-regulation of Kingsley Dam and associated facilities.
Figure 14 -- The acre-foot re-regulation credits and debits measured using 1994 USFWS wet/average and dry instream flow recommendations with and without the 30-day pulse target flows and based upon the Opstudy model.


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