@article{fdi:010049171,
  title = {{Z}on{A}gri : a modeling environment to explore agricultural activities and water demands on a regional scale},
  author = {{P}oussin, {J}ean-{C}hristophe and {P}ouget, {J}ean-{C}hristophe and {D}'{H}ont, {R}. {L}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}o design integrated water management for a whole region, all agricultural activities need to be taken into account together with their irrigation water requirements and agricultural outputs. {T}he aim of this paper is to present a modeling environment, called {Z}on{A}gri, that allows agricultural activities to be represented at regional scale and enables prospective scenarios concerning these activities to be tested. {T}he modeling of agricultural activities is based on typologies of farms and production units (i.e. plant cropping systems) using a simple framework. {A} region is designated as a set of "sectors" that correspond to geographical spaces: each sector is designated as a weighted (by strength) sum of "farms". {A} "farm" is designated as a weighted (by size) sum of "production units" that can be linked with specific geographical "sites" in the region. {E}ach "production unit" consumes inputs and produces outputs that can have prices. {T}his framework allows the aggregated calculation of inputs and outputs. as well as of the incomes of farms, sites or sectors. {S}cenarios can be built to change the original values or to envisage changes that may occur over a period of several years. {T}he results of multi-year simulations make up the database. {T}he information contained in the database can be requested by area or by sector, and can be mapped and exported to be used in a {GIS}. {M}aps of agricultural activities or water demand can then be superimposed on maps of water resources and hydraulic facilities to check if they are consistent. {Z}on{A}gri software was used to model agricultural activities in a plain in central {T}unisia where irrigation depends on pumping from the water table. {T}he resulting model enabled estimation of water demand for irrigation from public and private wells and the valorization of the water through agricultural outputs. {I}n our case, the model was then used in collaboration with stakeholders to evaluate the effects of water tariffs or market prices on farm incomes. {I}t could be also used to {S}imulate farmers' reactions concerning their crop choices or irrigation practices. {I}nteractions between activities or between resources and uses cannot be modeled using the framework. {H}owever, representing these interactions would result in intricate models, and in addition, such interactions would change as a function of changes in production systems. {I}t is thus more efficient to build simple models that enable stakeholders to understand the consequences of possible changes in their activities and the interactions between end uses of the water resource.},
  keywords = {{W}ater demand management ; {F}arming system ; {M}odeling ; {P}articipatory approach},
  booktitle = {},
  journal = {{L}and {U}se {P}olicy},
  volume = {27},
  numero = {2},
  pages = {600--611},
  ISSN = {0264-8377},
  year = {2010},
  DOI = {10.1016/j.landusepol.2009.08.001},
  URL = {https://www.documentation.ird.fr/hor/fdi:010049171},
}