VALIDATION OF AGNPS FOR SMALL WATERSHEDS USING AN INTEGRATED AGNPS/GIS SYSTEM Academic Article uri icon

abstract

  • ABSTRACT: The AGNPS (AGricultural NonPoint Source) model was evaluated for predicting runoff and sediment delivery from small watersheds of mild topography. Fifty sediment yield events were monitored from two watersheds and five nested subwatersheds in East Central Illinois throughout the growing season of four years. Half of these events were used to calibrate parameters in the AGNPS model. Average calibrated parameters were used as input for the remaining events to obtain runoff and sediment yield data. These data were used to evaluate the suitability of the AGNPS model for predicting runoff and sediment yield from small, mildsloped watersheds. An integrated AGNPS/GIS system was used to efficiently create the large number of data input changes necessary to this study. This system is one where the AGNPS model was integrated with the GRASS (Geographic Resources Analysis Support System) GIS (Geographical Information System) to develop a decision support tool to assist with management of runoff and erosion from agricultural watersheds. The integrated system assists with the development of input GIS layers to AGNPS, running the model, and interpretation of the results. Copyright 1993, Wiley Blackwell. All rights reserved

published proceedings

  • WATER RESOURCES BULLETIN

author list (cited authors)

  • MITCHELL, J. K., ENGEL, B. A., SRINIVASAN, R., & WANG, S.

citation count

  • 34

complete list of authors

  • MITCHELL, JK||ENGEL, BA||SRINIVASAN, R||WANG, SSY

publication date

  • October 1993

publisher