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Assessment of China's food producing capacities using a web-based land evaluation engine and a grid-based GIS

Liming Ye UGent, Ann Verdoodt UGent, Rachid Moussadek, Huajung Tang and Eric Van Ranst UGent (2008) ADVANCES IN GEOECOLOGY. 39. p.699-718
abstract
In this paper, we present a computer-aided assessment of the producing capacities of major food crops in China, using the Web-based Land Evaluation System “WLES” as the evaluation engine, a grid-based GIS as the scale regulator and a relational database as the data manipulator. The WLES accepts client’s requests and provides LE services through its Web interfaces. The LE engine implements a three-step, hierarchical, deterministic land evaluation (LE) model, based on a quantification of the radiation-thermal production potential (FAO methodology), the water-limited production potential and the land production potential of the crops considered. Functional components such as the biomass calculator (BMC), the water balance simulator (WBS) and the land limitations evaluator (LLE) compute these potentials, respectively. Homogeneous 5 km by 5 km grid datasets were created to store the spatial distribution of the climatic, crop and soil parameters. Using the cell number as the key, all data were stored in the relational database for fast and easy access. A client-side script simulated the food production in 2005 considering, among others, the land use type and distribution, province-specific cropping system patterns, and the intensity of factor inputs, represented by the effective irrigation rate, the fertilizer application rate and the management level. The simulation process was looped to iterate all the 778,104 grid cells, and output stored in the database on a per cell basis. The evaluation results were cross-analyzed against the historic and current yield records of the crop variety and input level combinations for each province. This validation procedure reflected the reliability of the modelling approach and revealed the goodness of the production scenario design. Food producing capacities towards 2030 and 2050 were projected. Province-specific potential productivity index were calculated, and spatial patterns of the high-intermediate-low yielding croplands in food production were identified. The WLES, together with its full documentation, is available at http://weble.ugent.be/.
Please use this url to cite or link to this publication:
author
organization
year
type
conference
publication status
published
subject
keyword
grid, land evaluation, China, food productivity
in
ADVANCES IN GEOECOLOGY
Adv. Geoecol.
editor
Carmelo Dazzi and Edoardo AC Costantini
volume
39
issue title
The soils of tomorrow : soils changing in a changing world
pages
699 - 718
publisher
Catena Verlag
place of publication
Reiskirchen, Germany
conference name
Changing soils in a changing world : the soils of tomorrow
conference location
Palermo, Italy
conference start
2007-06-25
conference end
2007-06-30
ISBN
9783923381562
language
English
UGent publication?
yes
classification
C1
copyright statement
I have transferred the copyright for this publication to the publisher
id
607445
handle
http://hdl.handle.net/1854/LU-607445
alternative location
http://www.catena-verlag.de/age39.htm
date created
2009-05-05 14:08:01
date last changed
2010-01-19 11:31:09
@inproceedings{607445,
  abstract     = {In this paper, we present a computer-aided assessment of the producing capacities of major food crops in China, using the Web-based Land Evaluation System {\textquotedblleft}WLES{\textquotedblright} as the evaluation engine, a grid-based GIS as the scale regulator and a relational database as the data manipulator. The WLES accepts client{\textquoteright}s requests and provides LE services through its Web interfaces. The LE engine implements a three-step, hierarchical, deterministic land evaluation (LE) model, based on a quantification of the radiation-thermal production potential (FAO methodology), the water-limited production potential and the land production potential of the crops considered. Functional components such as the biomass calculator (BMC), the water balance simulator (WBS) and the land limitations evaluator (LLE) compute these potentials, respectively. Homogeneous 5 km by 5 km grid datasets were created to store the spatial distribution of the climatic, crop and soil parameters. Using the cell number as the key, all data were stored in the relational database for fast and easy access. A client-side script simulated the food production in 2005 considering, among others, the land use type and distribution, province-specific cropping system patterns, and the intensity of factor inputs, represented by the effective irrigation rate, the fertilizer application rate and the management level. The simulation process was looped to iterate all the 778,104 grid cells, and output stored in the database on a per cell basis. The evaluation results were cross-analyzed against the historic and current yield records of the crop variety and input level combinations for each province. This validation procedure reflected the reliability of the modelling approach and revealed the goodness of the production scenario design. Food producing capacities towards 2030 and 2050 were projected. Province-specific potential productivity index were calculated, and spatial patterns of the high-intermediate-low yielding croplands in food production were identified. The WLES, together with its full documentation, is available at http://weble.ugent.be/.},
  author       = {Ye, Liming and Verdoodt, Ann and Moussadek, Rachid and Tang, Huajung and Van Ranst, Eric},
  booktitle    = {ADVANCES IN GEOECOLOGY},
  editor       = {Dazzi, Carmelo and Costantini, Edoardo AC},
  isbn         = {9783923381562},
  keyword      = {grid,land evaluation,China,food productivity},
  language     = {eng},
  location     = {Palermo, Italy},
  pages        = {699--718},
  publisher    = {Catena Verlag},
  title        = {Assessment of China's food producing capacities using a web-based land evaluation engine and a grid-based GIS},
  url          = {http://www.catena-verlag.de/age39.htm},
  volume       = {39},
  year         = {2008},
}

Chicago
Ye, Liming, Ann Verdoodt, Rachid Moussadek, Huajung Tang, and Eric Van Ranst. 2008. “Assessment of China’s Food Producing Capacities Using a Web-based Land Evaluation Engine and a Grid-based GIS.” In Advances in Geoecology, ed. Carmelo Dazzi and Edoardo AC Costantini, 39:699–718. Reiskirchen, Germany: Catena Verlag.
APA
Ye, L., Verdoodt, A., Moussadek, R., Tang, H., & Van Ranst, E. (2008). Assessment of China’s food producing capacities using a web-based land evaluation engine and a grid-based GIS. In C. Dazzi & E. A. Costantini (Eds.), ADVANCES IN GEOECOLOGY (Vol. 39, pp. 699–718). Presented at the Changing soils in a changing world : the soils of tomorrow, Reiskirchen, Germany: Catena Verlag.
Vancouver
1.
Ye L, Verdoodt A, Moussadek R, Tang H, Van Ranst E. Assessment of China’s food producing capacities using a web-based land evaluation engine and a grid-based GIS. In: Dazzi C, Costantini EA, editors. ADVANCES IN GEOECOLOGY. Reiskirchen, Germany: Catena Verlag; 2008. p. 699–718.
MLA
Ye, Liming, Ann Verdoodt, Rachid Moussadek, et al. “Assessment of China’s Food Producing Capacities Using a Web-based Land Evaluation Engine and a Grid-based GIS.” Advances in Geoecology. Ed. Carmelo Dazzi & Edoardo AC Costantini. Vol. 39. Reiskirchen, Germany: Catena Verlag, 2008. 699–718. Print.