@inproceedings{PAR00007517,
  title = {{I}mproving estimates of water demand at scheme level using knowledge on farmers' practices},
  author = {{H}anafi, {S}. and {A}bdelaziz, {Z}. and {M}ailhol, {J}.{C}. and {L}e {G}russe, {P}. and {R}uelle, {P}. and {P}oussin, {J}ean-{C}hristophe},
  editor = {},
  language = {{ENG}},
  abstract = {{A}ccurate estimation of water demand at the irrigation scheme scale is a key requirement for water management, which is made difficult by the large diversity of crops and production systems. {T}he main objective of this study was to estimate irrigation water demand at the farm scale, taking different types of knowledge into account: (i) database study, where water demand is supposed to be the supply ({L}0); (ii) actual cropping pattern ({L}1),; (iii) actual irrigation techniques and cropping pattern ({L}2); and (iv) actual irrigation practices, actual irrigation techniques, and cropping pattern ({L}3). {F}arm typology makes easy this estimation as it takes into account various farm characteristics. {F}irstly, a farm typology was established based on 115 farms surveyed in the irrigation scheme of {B}orj {T}oumi {T}oungar ({T}unisia), selected for the study. {S}econdly, climatic crop water irrigation requirements were estimated using the agro-meteorological water balance model {P}ilote. {T}ypology results were used to estimate water demand at the scale of family farms taking into account different levels of knowledge {S}ix classes of farming areas were identified based on irrigation subsystems, cropping pattern (fruit tree area, cropping vegetable area and field crop area), intensification crop level and cropped surface. {R}esults showed that supply could not entirely cover the climatic water demand. {H}owever, it could nearly meet actual water demand at the farm scale. {A}ccording to the water demand estimation at different levels, results showed that there were few changes in water demand at farm scale when moving from {L}1 to {L}2. {A}t the opposite, actual water demand ({L}3) represented about half the climatic water demand ({L}2). {C}alculations based on farm classes highlighted the importance of actual farm practices. {W}ithin the same class, the difference between water demand estimation at different levels of knowledge was remarkable. {N}etwork rehabilitation is thus necessary to enable farmers to increase water delivered to crops and limit water stress; the collective network was conceived to deliver a flow of 0.34 l/s/ha in this sector. {G}iven changes in farming and varietal choices, this flow proved insufficient to face the climatic water demand.},
  keywords = {{TUNISIE}},
  numero = {},
  pages = {9},
  booktitle = {{E}conomies d'eau en syst{\`e}mes irrigu{\'e}s au {M}aghreb},
  year = {2009},
  URL = {https://www.documentation.ird.fr/hor/{PAR}00007517},
}