Loading...
Please wait, while we are loading the content...
Similar Documents
FIVE-CoRE: a simple model for farm irrigation volume estimates according to constraints and requirements. Application to sugarcane in Reunion (France).
| Content Provider | Semantic Scholar |
|---|---|
| Author | Chopart, Jean-Louis Mézino, Mickaël Mézo, Lionel Le Fusillier, Jean-Louis |
| Copyright Year | 2007 |
| Abstract | A SIMPLE model to estimate the optimum irrigation water consumption (OIC) of sugarcane and annual crops was developed. The FIVE-CoRe (Farm Irrigation Volume Estimation according to Constraints and Requirements) tool was designed for use at individual farm and irrigated scheme levels. It functions on a daily time step and takes the main physical factors that determine water requirements, irrigation strategy, and some technical constraints associated with this irrigation into account. It was implemented for 3 years in southern Reunion to assess OICs of sugarcane in a cropping area of around 2500 ha (22 micro-areas). The mean cumulated OICs simulated by the model were generally close to the actual irrigation water consumption (AIC) levels. This showed that the model can efficiently estimate AICs despite its simple conceptual design and the 1to 3-fold variability in annual accumulated irrigation for the microzones. In two micro-zones, however, there were marked differences between AIC and OIC values. FIVE-CoRe can be used to test irrigation water volumes under different irrigation scenarios and strategies. Gaps between AICs and OICs were indicators of the efficiency of irrigation practices. FIVE-CoRe could also be used to simulate irrigation water volumes for crops under different climatic scenarios, irrigation strategies and for sensitivity analysis. Introduction On the island of Reunion, climate and soil are highly variable in spatiotemporal terms. This complicates irrigation advice (Chopart et al., 2007) and assessment of optimum irrigation water consumption (OIC) levels. Irrigation water is a scarce resource, with increasing competition from other uses. It is essential for decision makers to know if farmers' current irrigation practices (AIC) correspond to actual requirements of the crop, including the crop OIC level, along with key constraints that could keep farmers from supplying the right water dose application at the right time. Gaps between AICs and OICs were indicators of the efficiency of irrigation practices. To our knowledge, no OIC forecasting tool specifically adapted to the local Reunion environment and sugarcane farming systems was previously available. Thus a simple model to estimate OICs on individual farm and aggregated scheme levels (sprinkler and drip irrigation) was developed. The model takes the main factors that determine irrigation requirements, farmers' irrigation strategies and some technical constraints (such as available water flow rate) into account. This |
| Starting Page | 490 |
| Ending Page | 493 |
| Page Count | 4 |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.issct.org/pdf/proceedings/2007/Papers/2007%20Chopart,%20FIVE-CORE%20A%20SIMPLE%20MODEL%20FOR%20FARM%20IRRIGATION%20VOLUME%20ESTIMATES%20ACCORDING%20TO%20CONSTRAI.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
