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� � Synopsis of Sand Creek I nventory
<br /> Cropland Inventory
<br /> Best Management Practices Needed
<br /> Weighted Current Sheet Weighted Sheet Length oi Ephem- Tons ot Ephem- Gully Tile W/Ways Terraces WASCOBS Grade Filter
<br /> Tracts 'el s I es &Rill in Tons $Rill in Tons eral Erosion eral Erosion osion Needed e e Heeded Needed Stab. S,y��' s
<br /> 57 108 47 Tons 4,848 Ac. 16,103 Tons 3.3 Tons/Acres 55,135 Ft. 3,937 Tons 580 Tons 13,000 ft. 41,135 ft. 14,200 ft. 16 No. 7 No. 50 Ac.
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<br /> Exam les of e hemeral erosion in the and re
<br /> S C ek Watershed:this t e of erosion o
<br /> ccurs on the entl slo in to stron I slo in la
<br /> P P YP 9 Y p 9 9 Y P 9 nd�S)
<br /> that drain directly into Sand Creek. Numerous breakover points occur along the stream bank which serve as discharge areas for silts and
<br /> sediments to enter into Sand Creek and then transported to Lake Decatur.
<br /> Incorporating a Sediment Delivery Ratio(SDR)will yield an estimated tons of soil that will be deposited into Lake Decatur:
<br /> Sheet&Rill:........ 16,103 Tons x .25 =4,026 Tons
<br /> Ephemeral:.......... 3,937 Tons x .35= 1,378 Tons
<br /> Gully:............. 580 Tons x .75= 435 Tons
<br /> Total =5,839 Tons Annually or 8,650 Cu. Yd.
<br /> (Presuming 50 Ibs. of Soil per Cu. Ft.)
<br /> Although the weighted sheet and rill is 3.3 Tons/Ac.which is considerably less than the weighted T of 4.7 Tons, 10 tracts of farmland where
<br /> eroding between 1-2T.
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