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Watershed Erosion and Sediment Inventon�(Separate Boz) <br /> In 2001, an inventory of the Finley Creek«�atershed was done to estimate the average annual rate of <br /> erosion and sedimentation. Statistically valid sampling units were selected that represent 10%of the <br /> watershed. Field inventories were conducted on these units to assess current erosion conditions. This data <br /> was then used to calculate the annual average sheet and rill, ephemeral, gully and streambank erosion. <br /> This information from the sample units was expanded to calculate sediment delivery rates for each type of <br /> erosion and the sediment transport factor for the watershed. Ultimately,the goal was to estimate the total <br /> sediment load at the mouth of Finley Creek to Lake Decatur. The results are as follows: <br /> Tota1 Sediment Load Delivered=23,910-25,060 tons from 18,865 acres annually <br /> SHEET AND RILL EPHEMERAL GULLY STREAMBAIvK <br /> EROSION EROSION EROSION EROSION <br /> 41,SSO TONS 15.000 TONS 77O TONS 1,400 TONS <br /> ANNIJALLY, 58,720 TONS OF SOIL ERODING IN FINLEY <br /> CREEK WATERSIiED <br /> 22,760 TONS REACH 35,960 TONS OF SOIL <br /> LAKE DECATUR ARE RE-DEPOSITED <br /> IN THE WATERSHED <br /> 1,150-2,300 TONS OF SOIL <br /> FROM BEDIAAD MATERIAL <br /> Arrlvual,LY, 23,910-25,060 TONS OF 17,070 TONS OF solL �� <br /> SOIL ARE DELIVERED ON AVERAGE TO CAN BE REDUCED ' <br /> LAKE DECATUR � <br /> WITH CONSERVATION <br /> Conclusion <br /> The Finley Creek watershed is contributing to the issues in Lake Decaiur.To address the problems that <br /> are faced with the Lake,they must be addressed with input of stalceholders within each sub-watershed. <br /> With the input of the Finley Creek Committee this plan becomes a more useable tool. <br /> The existing problems will only get worse with development and construction that is expected to occur in <br /> the future. Planning and preparing for these issues now•will reduce potential problems of the future and <br /> improve cunent conditions. Everyone is encouraged to use this plan and learn more about his or her <br /> watershed. <br /> OS/31/02 14 <br />