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WSP06144
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Last modified
1/26/2010 2:21:26 PM
Creation date
10/12/2006 1:27:37 AM
Metadata
Fields
Template:
Water Supply Protection
File Number
8210.470
Description
Organizations - Pacific Southwest Inter-Agency Committee - PSIAC
Basin
Colorado Mainstem
Water Division
5
Date
10/1/1968
Author
PSIAC
Title
Pacific Southwest Inter-Agency Committee - Report of the Water Management Subcommittee
Water Supply Pro - Doc Type
Report/Study
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<br />" <br /> <br />14 <br /> <br />treatment practices and current management planning. <br /> <br />N:The rating factor of Land Use (g) was rated first for the FWOP <br />c:n because this factor influences the other factor ratings. The <br />~ fact9r rating would increase if present trends .are interpreted to <br />QQ be causing the resource condition to degrade and therefore, <br />increase sediment yield potential. The, factor rating would <br />decrease if the land will . respond to current land treatment <br />practices that would improve the resource condition and therefore <br />decrease sediment yield potential. The rating would remain the <br />same if the present trends have stabilized the land resource.s. The <br />rating is arrived at by consultation between land use planners and <br />technical specialists. <br /> <br />. <br />The Ground Cover (f) rating factor is modelled for the ,F'WOP <br />condition based on the anticipated impact of the current Land Use <br />(g) and the present trends, continuing into the future, Greater <br />vegetative ground cover created by increased litter and/or <br />increased vegetation would lower the rating. A degrading present <br />trend would raise the rating. ' <br /> <br />1he Runoff (d) factor is modelled for the FWOP condition based on <br />the increased or decreased ground cover,. An increase of Ground <br />Cover (f) would lower the rating and a decrease in Ground Cover (f) <br />would raise' the rating. ' ,', <br /> <br />The Upland Erosion (h) factor rating is modelled for the FWOP <br />condition based on the Runoff (d) and Ground Cover (f) ratings. <br />There would be less potential for concentrated overland flow <br />erosion if ground cover is increased and runoff is slowed. <br />Therefore, the rating would decrease. There would be greater <br />potential for concentrated overland flow if ground cover is <br />decreased and runoff is accelerated. Therefore, the rating would <br />'increase. <br /> <br />The Channel Erosion and Sediment Transport (i) rating ,factor is <br />modelled for the FWOP condition based on the Upland Erosion rating. <br />There' would be an increase in channel erosion and sediment <br />transport rating if concentrated overland flow is increased. '1'here <br />would be a decrease in the rating if concentrated overland flow was <br />decreased. Therefore, gullies and channels would re-vegetate and <br />staJ:;>ilize. <br /> <br />Future with Project Condition (FWP): The FWP condition is the <br />model of proposed land treatment practices that will control the <br />accelerated sediment and salt yield problems. TheFWP condition is <br />modelled for a 5 to 50 year planning period. Factor ratings can be <br />increased, decreased or remain the same by implementation of <br />conservation oriented land treatment practices and management <br />planning. <br /> <br />The factor of Land Use (g) is rateq first for the FWP because this <br />
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