Full TGIF Record # 83943
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Web URL(s):http://elibrary.asabe.org/azdez.asp?JID=3&AID=11074&CID=t2002&v=45&i=5&T=2&redirType=
    Last checked: 10/13/2015
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Publication Type:
i
Report
Author(s):Mankin, K. R.; DeAusen, R. D.; Barnes, P. L.
Author Affiliation:Mankin: ASAE Member Engineer, Assistant Professor, Department of Biological and Agricultural Engineering, Kansas State University, Manhattan, Kansas; DeAusen: Former Graduate Student, Department of Biological and Agricultural Engineering, Kansas State University, Manhattan, Kansas; and Barnes: ASAE Member Engineer, Assistant Professor, Department of Biological and Agricultural Engineering, Kansas State University, Manhattan, Kansas
Title:Assessment of a GIS-AGNPS interface model
Source:Transactions of the American Society of Agricultural Engineers. Vol. 45, No. 5, September/October 2002, p. 1375-1383.
# of Pages:9
Publishing Information:St. Joseph, MI
Keywords:TIC Keywords: Models; GIS; Mapping; Soil texture; Erosion; Slope; Land use; Watersheds
Abstract/Contents:"Data from geographic information system (GIS) are important for developing input datasets for watershed models. However, the process used to translate GIS data into model-input data can introduce errors. Although GIS data are routinely checked to assure their mapping accuracy, it is far less likely that the derived model-input data are verified. The objective of this project was to assess GIS interface generated data for the AGNPS watershed model by comparison to baseline data from manually conducted field survey for the Horseshoe Creek watershed in Kansas. Mulitple descriptors were used to assess agreement between datasets. Very good agreement was found for soil parameters (soil texture and erodibility), moderate agreement for land-use parameters (crop and management practice factors), and poor agreement for topographic parameters (slope and slope length). The absence of GIS data layers pertaining to management practices, such as contouring and terracing, reduced the agreement in land-use terms. Poor estimation of slope by GIS interface model for larger cell size resulted in the poor agreement in topographic values. Issues related to appropriate cell sizes, generation of land-management practice GIS coverages, accuracy of GIS coverages, and accuracy of interface algorithms must be addressed by watershed modelers using GIS data."
Language:English
References:40
Note:Figures
Graphs
Tables
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Mankin, K. R., R. D. DeAusen, and P. L. Barnes. 2002. Assessment of a GIS-AGNPS interface model. Trans. Proc. Am. Soc. Agric. Eng. 45(5):p. 1375-1383.
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http://elibrary.asabe.org/azdez.asp?JID=3&AID=11074&CID=t2002&v=45&i=5&T=2&redirType=
    Last checked: 10/13/2015
    Requires: PDF Reader
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MSU catalog number: S 671 .A452
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