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Last modified
1/26/2010 11:09:11 AM
Creation date
10/9/2006 2:33:13 AM
Metadata
Fields
Template:
Water Supply Protection
File Number
8408
Description
River Basin General Correspondence
State
CO
Basin
South Platte
Water Division
1
Date
9/28/1990
Title
Platte River Evaluation: USBR - Plan of Study for Evaluation of Operations of Existing Reclamation Projects on the Platte River for the Potential to Affect Threatened or Endangered Species
Water Supply Pro - Doc Type
Report/Study
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<br />" <br /> <br />oonf',",a <br />iJ ~ f) J <br /> <br />.. <br /> <br />.. <br /> <br />VI. ProQram ADalvsis <br /> <br />8. Activities Schedules <br /> <br />The activities of the evaluation of existing Reclamation projects are <br />scheduled fUL L~~cal years ~~~u ~hrough i~~~ wLtn the North platte River <br />project evaluation report scheduled for completion in fiscal year 1993 <br />and the South Platte Colorado-Big Thompson evaluation report scheduled <br />for completion in fiscal year 1995. The work schedule is over this <br />extended time frame to accommodate work tasks that are dependent on data <br />collection and information gathering from other agencies. <br /> <br />The work is being divided into five'parts or phases. This was done to <br />elaborate on different work item areas. The major Plan of Study <br />activities are: (1) Hydrologic Operations Analysis, (2) Platte River <br />Hydraulic and Sediment Characteristics, (3) Development of Species/ <br />Habitat Management Needs and Goals, (4) Evaluation of Project <br />Operational Effects on Species Habitat, and (5) Evaluation of Other <br />Operational Alternatives. <br /> <br />1. Hvdroloqic ODeration Analvsis <br /> <br />. <br />The activities associated with hydrologic operation analysis are those <br />necessary to develop predictive monthly Platte River, North Platte <br />River, and South Platte River operation studies. In addition, if the <br />need arises, predictive daily operation studies for selected Platte <br />River reaches will be developed. The development of operation studies <br />will consider the length of study period, data sources, system operation <br />criteria, water requirements, and building the operations modelsa <br />During fiscal year 1990 and 1991, focus will be placed on developing a <br />monthly flow model for the North Platte River (from seminoe inflow <br />downstream to Lewellen, Nebraska). The Central Platte Opstudy model <br />will be modified to be compatible with the North Platte model. <br /> <br />The study period selected will be a time period that is representative <br />of long term climatic conditions and is assumed to be representative of <br />future runoff or water supply conditions. Past analysis of Platte River <br />hydrology have been complicated by the use of a number of different time <br />periods for various water supply analyses. The study period will be <br />determined by analyzing trends in headwater and tributary discharge, <br />noting length of discharge records, and looking at consumptive use <br />basin-wide to make sure the high and low extremes are includeda <br /> <br />The data for developing and updating operation studies will be obtained <br />from Reclamation, USGS, NOAA, and State water resource records. <br />Computerized data files for the study period will be developed for flow, <br />diversions, return flows, climate, and land use development a Other <br />basic data to be collected includes water right filing records showing <br />type of use, location, priority, and amount allocated. The hydraulic <br />capacities of structures (dams, diversion dams, and power plant) is <br />another set of information which will be assembled and utilized. <br /> <br />14 <br />
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