Modelling for Improved Irrigation Water Management in a Temperate Region of Northern Spain

Cancela, J.J.; García, Tomás S. Cuesta; Neira, X. X.; Pereira, Luís S.

doi:10.1016/j.biosystemseng.2006.02.010

Cited by 40 publications

(25 citation statements)

References 15 publications

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“…Furthermore, they would be useful in the assessment of saturation risks or water stress (drought), thus aiding in the decision making, for instance, in irrigation management. Results from this study can be used for crop water requirement modelling purposes employing such models as ISAREG (Pereira et al, 2003), which has been successfully applied to maize crops in Galicia (Cancela et al, 2006) and may help to improve irrigation practices in humid zones.…”

Section: Discussionmentioning

confidence: 99%

“…Then, the variation of irrigation requirements is extremely high (Paz et al, 1996), making it impossible to predict the optimum irrigation schedule at the start of each growing season. In fact, predicted irrigation requirements for this region have varied considerably between years, ranging from 124 to 358 mm for silage maize (Cancela et al, 2006). Therefore, monitoring soil water content may be helpful to obtain a more accurate soil water balance (Vera et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

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Estimation of the daily water consumption by maize under Atlantic climatic conditions (A Coruña, NW Spain) using Frequency Domain Reflectometry – a case study

Mestas-Valero¹,

Mirás-Avalos²,

Vidal-Vázquez³

2012

Nat. Hazards Earth Syst. Sci.

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Abstract. Climatic variables and soil present a high spatiotemporal variability. Evapotranspiration estimations based on climatic variables may be inadequate for assessing soil water content in the root-influenced zone and/or soil water consumption by plants. Other methods may provide better estimates of this water consumption. The aim of this study was to quantify the soil moisture dynamics in the rootinfluenced zone and to assess the daily water consumption by the crop using Frequency Domain Reflectometry (FDR).

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Estimation of the daily water consumption by maize under Atlantic climatic conditions (A Coruña, NW Spain) using Frequency Domain Reflectometry – a case study

Mestas-Valero¹,

Mirás-Avalos²,

Vidal-Vázquez³

2012

Nat. Hazards Earth Syst. Sci.

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“…Soil samples were collected from an irrigated area in the region of Terra Cha, Galicia, northwestern Spain Cancela et al, 2006b) ( Figure 1a). The Terra Cha region, with an average elevation of 420 m asl, is an area with little topographic contrast and the headwater catchment of the Miño River.…”

Section: Description Of the Areamentioning

confidence: 99%

The efficiency of different estimation methods of hydro-physical limits

Martínez¹,

García²,

Cancela³

2012

Rev. Bras. Ciênc. Solo

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SUMMARYThe soil water available to crops is defined by specific values of water potential limits. Underlying the estimation of hydro-physical limits, identified as permanent wilting point (PWP) and field capacity (FC), is the selection of a suitable method based on a multi-criteria analysis that is not always clear and defined. In this kind of analysis, the time required for measurements must be taken into consideration as well as other external measurement factors, e.g., the reliability and suitability of the study area, measurement uncertainty, cost, effort and labour invested. In this paper, the efficiency of different methods for determining hydro-physical limits is evaluated by using indices that allow for the calculation of efficiency in terms of effort and cost. The analysis evaluates both direct determination methods (pressure plate -PP and water activity meter -WAM) and indirect estimation methods (pedotransfer functions -PTFs). The PTFs must be validated for the area of interest before use, but the time and cost associated with this validation are not included in the cost of analysis. Compared to the other methods, the combined use of PP and WAM to determine hydro-physical limits differs significantly in time and cost required and quality of information. For direct methods, increasing sample size significantly reduces cost and time. This paper assesses the effectiveness of combining a general analysis based on efficiency indices and more specific analyses based on the different influencing factors, which were considered separately so as not to mask potential benefits or drawbacks that are not evidenced in efficiency estimation.Index terms: field capacity, permanent wilting point, pedotransfer functions, water activity meter.(1) Received for publication in January 24, 2011 and approved in September 25, 2012.

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“…The model is used for a variety of crops and environments, e.g. in the Mediterranean region Zairi et al, 2003), North China (Liu et al, , 2006Pereira et al, 2007), South America (Victoria et al, 2005), Central Asia (Fortes et al, 2005;Cholpankulov et al, 2008) and Europe (Popova et al, 2006a;Cancela et al, 2006). The model performs the irrigation scheduling simulations according to the following user-defined options:…”

Section: Simulation Of the Soil Water Balancementioning

confidence: 99%

Simulation of the soil water balance of wheat using daily weather forecast messages to estimate the reference evapotranspiration

Cai

Liu

et al. 2009

Hydrol. Earth Syst. Sci.

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Abstract. Aiming at developing real time water balance modelling for irrigation scheduling, this study assesses the accuracy of using the reference evapotranspiration (ET o ) estimated from daily weather forecast messages (ET o,WF ) as model input. A previous study applied to eight locations in China (Cai et al., 2007) has shown the feasibility for estimating ET o,WF with the FAO Penman-Monteith equation using daily forecasts of maximum and minimum temperature, cloudiness and wind speed. In this study, the global radiation is estimated from the difference between the forecasted maximum and minimum temperatures, the actual vapour pressure is estimated from the forecasted minimum temperature and the wind speed is obtained from converting the common wind scales into wind speed. The present application refers to a location in the North China Plain, Daxing, for the wheat crop seasons of 2005-2006 and 2006-2007. Results comparing ET o,WF with ET o computed with observed data (ET o,obs ) have shown favourable goodness of fitting indicators and a RMSE of 0.77 mm d −1 . ET o was underestimated in the first year and overestimated in the second. The water balance model ISAREG was calibrated with data from four treatments for the first season and validated with data of five treatments in the second season using observed weather data. The calibrated crop parameters were used in the simulations of the same treatments using ET o,WF as model input. Errors in predicting the soil water content are small, 0.010 and 0.012 m 3 m −3 , respectively for the first and second year. Other indicators also confirm the goodness of model predictions. It could be concluded that using ET o computed from daily weather forecast messages provides for accurate model predictions and to use an irrigation scheduling model in real time.

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Modelling for Improved Irrigation Water Management in a Temperate Region of Northern Spain

Cited by 40 publications

References 15 publications

Estimation of the daily water consumption by maize under Atlantic climatic conditions (A Coruña, NW Spain) using Frequency Domain Reflectometry – a case study

Estimation of the daily water consumption by maize under Atlantic climatic conditions (A Coruña, NW Spain) using Frequency Domain Reflectometry – a case study

The efficiency of different estimation methods of hydro-physical limits

Simulation of the soil water balance of wheat using daily weather forecast messages to estimate the reference evapotranspiration

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