Building dedicated 1/15/1982

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2 Building dedicated 1/15/1982

3 West Lafayette, Indiana on the campus of Purdue University

4 Conservation Planning evaluate land management alternatives to reduce soil erosion to acceptable levels. Resource Inventories estimate current and projected erosion levels and their impact on natural resource base. Sediment Delivery Prediction - Estimate sediment generation and delivery off-site, and evaluate management strategies to minimize sediment losses and impacts. (Use in other models for this as well.)

5 Some erosion plots at Guthrie, Oklahoma experiment station, circa SCS Chief Hugh H. Bennett shown.

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7 The USDA Agricultural Research Service s NRSLDC was created at Purdue University in The first Research Leader was Mr. Walt Wischmeier, a statistician transferred from Missouri. He had formerly been a Soil Conservation Service employee. Other original scientists in the unit were Don Meyer, Don McCune, and Tam Olson. The main focus of the unit originally was to house and use all of the data collected at the SCES locations. Data was transferred to computer punch cards, and then statistical analyses run using Purdue s new computing capabilities. Work at the NRSLDC resulted in the development of the Universal Soil Loss Equation (USLE), published in 1965.

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9 Universal Soil Loss Equation, USLE A = R K L S C P Milestones of USLE technology development: Agriculture Handbook 282 (1965), and 537 (1978).

10 The large success of the USLE and the accomplishments by the scientists at the NRSLDC provided the impetus to secure Congressional funding in 1977 for construction of a physical facility at Purdue University for continuing soil erosion research and prediction technology development. Construction began in 1979 and was completed in The NSERL building was dedicated on January 15, First research leader was Dr. Bill Moldenhauer. Scientists when the lab opened were Dr. George Foster, Dr. Joe Bradford, and Dr. Darrell Norton.

11 CREAMS/GLEAMS model erosion component RUSLE model Water Erosion Prediction Project (WEPP) model

12 WEPP modeling effort initiated in Core Team of ARS, SCS, FS, BLM scientists Field experiments for model parameterization in on cropland and rangeland soils FORTRAN model code mainly developed from Validated WEPP hillslope and watershed model released in 1995, with full documentation and a DOS interface Updated model releases every 1-2 yrs since

13 USDA Agricultural Research Service USDA Natural Resources Conservation Service USDA Forest Service USDI Bureau of Land Management USDOD Corps of Engineers Universities Other Research Organizations

14 Top row: J. Gilley, G. Foster, J. Nordin, G. Weesies, A. Nicks, R. Young, M. Weltz, J. Laflen, D. Fox Bot. row: V. Lopes, M. Nearing, D. Schertz, R. Simanton, W. Osterkamp, Clarence Yeutter (Sect. of Agriculture), L. Lane, E. Alberts, N. Miller, W. Rawls, G. Wingate. (Picture taken 6/13/1990)

15 33 Cropland Soils 24 Rangeland Soils

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17 Testing/enhancement of WEPP science model Enhanced channel hydrology to allow application to larger watersheds. Cooperators at Washington State University have incorporated new channel flow routines, and a simple baseflow component. Cooperators at the University of Iowa have linked WEPP with a larger channel erosion model. Evaluation of tile drainage routines in cooperation with faculty at Ohio State University Utilizing results from other NSERL research into ephemeral gully formation and detachment, to improve these predictions in the model.

18 Enhancement/expansion of WEPP interfaces & databases Development of new default cropping/management example inputs Minimum of 20 new sets per state Continued improvements to WEPP Windows software and desktop GIS interface. Development of internet-based GIS interfaces Web-based hillslope and watershed interfaces Web-based GIS watershed interfaces Prototype on NSERL website Targeted grant project for Great Lakes Forested watersheds (USACE) Targeted grant project for Lake Tahoe Basin (US Forest Service) Cooperation with SWAT model developers to allow WEPP and SWAT simulations at any location in world using global geospatial climate and soils databases.

19 Cropped area in Yellow. Detachment in RED Grass buffer in dark Green Deposition in light GREEN

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21 GeoWEPP Geo-spatial Interface for WEPP implemented as an extension in ArcView/ArcGIS. Soil detachment or deposition depicted graphically on sub-basins within a small watershed.

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26 Long history of soil erosion prediction and modeling efforts at the NSERL WEPP is a process-based model developed by USDA since The validated and documented model is available, along with major databases for climate, soils, and cropping/management for the U.S. WEPP can be applied as a soil conservation planning tool for croplands, forestlands, and rangelands.