Advanced SearchSearch Tips
APEX(Agricultural Policy/Environmental eXtender) Model: An Emerging Tool for Agricultural Environmental Analyses
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
 Title & Authors
APEX(Agricultural Policy/Environmental eXtender) Model: An Emerging Tool for Agricultural Environmental Analyses
Kim, Min Kyeong; Choi, Soon Kun; Jung, Goo Buk; Kim, Myung Hyun; Hong, Seong Chang; So, Kyu Ho; Jeong, Jae Hak;
  PDF(new window)
The agricultural policy/Environmental eXtender (APEX) model was developed by the Blackland Research and Extension Center in Temple, Texas. APEX is a flexible and dynamic tool that is capable of simulating a wide array of management practices, cropping systems, and other land uses across a broad range of agricultural landscapes, including whole farms and small watersheds. The model can be configured for novel land management strategies, such as filter strip impacts on pollutant losses from upslope crop fields, vegetated grassed waterways in combination with filter strip impacts, and land application of manure removed from livestock feedlots or waste storage ponds. The APEX model has continually evolved since its inception, and the process of adaptation and modification will likely continue as use of the model expands for an ever-increasing range of environmental problems and conditions. Several improvements to specific model subroutines have already been initiated, while other potential improvements have been identified that will require future research and code modification efforts.
APEX;Best management practices;Conservation practices;Farm and watershed simulations;Soil carbon;Water quality;
 Cited by
Analysis of components and applications of major crop models for nutrient management in agricultural land,;;;;;;

농업과학연구, 2016. vol.43. 4, pp.537-546 crossref(new window)
Analysis of components and applications of major crop models for nutrient management in agricultural land, Korean Journal of Agricultural Science, 2016  crossref(new windwow)
Arnold, J.G., J. D. Atwood, V. W. Benson, R. Srinnivasan, and J. R. Williams. 1998. Potential Environmental and Economic Impacts of Implementing National Conservation Buffer Initiative Sedimentation Control Measures. USDA, NRCS Staff paper.

Eckhardt, K. and U. Ulbrich. 2003. Potential impacts of climate change on groundwater recharge and streamflow in a central European low mountain range. J. Hydrol. 284:244-252. crossref(new window)

Flowers, J. D., J. R. Williams, L. M. Hauck, 1996. Livestock and the Environment: A National Pilot Project NPP Integrated Modeling system: Calibration of the APEX Model for Dairy Waste Application Fields in Erath County, Texas. TIAER pr 96-07.

Gassman, P.W., J.R. Williams, V.W. Benson, R.C. Izaurralde, L. Hauck, C.A. Jones, J.D. Atwood, J. Kiniry, and J.D. Flowers. 2005. Historical development and applications of the EPIC and APEX models. Working paper 05-WP 397, CARD, Iowa State Univ., Ames, IA.

Gassman, P.W., J.R. Williams, X. Wang, A. Saleh, E. Osei, L. Hauck, C. Izaurralde, and J. Flowers. 2010. The Agricultural Policy Environmental Extender(APEX) model: An emerging tool for landscape and watershed environmental analyses. Trans. ASABE. 55:1447-1462.

Jung, C.G. J.Y. Park, J.W. Lee, H. Jung, S.J. Kim. 2011. The applicability of SWAT-APEX model for agricultural nonpoint source pollution assessment. KSAE. 53:35-42. crossref(new window)

Kim, M.K. S.I. Kwon, G.B. Jung, S.C. Hong, M.J. Choi, S.G. Yun, K.H. So. 2013. Small-scale pond effects on reducing pollutants load from a paddy field. Korean J Environ Agric. 32:347-350. crossref(new window)

Knisel, W.G. 1980. CREAMS, A field scale model for chemicals, runoff, and erosion from agricultural management systems. U.S. Dept. Agric. Conserv. Res. Rept. No.26.

Leonard, R.A., W.G. Knisel, and D.A. Still. 1987. GLEAMS: Groundwater loading effects on agricultural management systems. Trans. ASAE 30(5):1403-1428. crossref(new window)

Putman, J., J. Williams, and D. Sawyer. 1988. Using the erosion productivity calculator(EPIC) model to estimate the impact of soil erosion for the 1985 RCA appraisal. J. Soil Water Conserv. 43(4):321-326.

Sharpley, A.N. and J.R. Williams, eds. 1990. EPIC-Erosion/ Productivity Impact Calculator: 1. Model Documentation. U.S. Dept. Agric. Tech. Bull. No. 1768.

Williams, J.R., C.A. Jones, and P.T. Dyke. 1984. A modeling approach to determining the relationship between erosion and soil productivity. Trans. ASAE 27:129-144. crossref(new window)

Williams, J.R., A.D. Nicks, and J.G. Arnold. 1985. SWRRB, a simulator for water resources in rural basins. ASCE Hydr. J., 111(6): 970-986. crossref(new window)

Williams, J.R. 1995. The EPIC Model. pp 909-1000 In V. P. Singh, Computer models of watershed hydrology, Water Resources Publications, Highlands Ranch, CO.