GODOY FAUNDEZ, ALEX ORIEL
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GODOY FAUNDEZ, ALEX ORIEL
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GODOY FAUNDEZ, ALEX ORIEL
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alexgodoy@udd.cl
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23481970600

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Publication

Multiperiod Optimisation of Irrigated Crops under Different Conditions of Water Availability

2018 , Mathias Kuschel-Otárola , Diego Rivera Salazar , Eduardo Holzapfel , PALMA INFANTE, CRISTIAN DERECK , GODOY FAUNDEZ, ALEX ORIEL

We propose a nonlinear optimisation model which maximises profits by resource allocation on a monthly time scale, considering a monthly crop yield model. The proposed model was applied to six management scenarios (two seasonal and four monthly), nine conditions of water availability, and two situations of resource availability under Chilean conditions. These situations provided the same seasonal amount of resources, but different distributions over time. The model included improvements in water resource management such as water storage and water transactions, being the latter a monthly decision variable that can increase farmers’ profits. According to our results, monthly scenarios gave high profits, even better with appropriate resource distribution. When water costs are high, water transactions allow loss reduction of up to 50%. Regarding labour, the lack of availability is more critical than the wages.

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Understanding water disputes in Chile with text and data mining tools

2019 , HERRERA MARÍN, MAURICIO RENÉ , CANDIA VALLEJOS, CRISTIAN ESTEBAN , Diego Rivera Salazar , Douglas Aitken , Daniel Brieba , BOETTIGER PHILIPPS, CAMILA , Guillermo Donoso , GODOY FAUNDEZ, ALEX ORIEL

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Validation of Cryogenic Vacuum Extraction of Pore Water from Volcanic Soils for Isotopic Analysis

2019 , Diego Rivera Salazar , Karen Gutierrez , Walter Valdivia-Cea , Mauricio Zambrano-Bigiarini , GODOY FAUNDEZ, ALEX ORIEL , Amaya Álvez , Laura Farías

Andean headwater catchments are key components of the hydrological cycle, given that they capture moisture, store water and release it for Chilean cities, industry, agriculture, and cities in Chile. However, knowledge about within-Andean catchment processes is far from clear. Most soils in the Andes derive from volcanic ash Andosols and Arenosols presenting high organic matter, high-water retention capacity and fine pores; and are very dry during summer. Despite their importance, there is little research on the hillslope hydrology of Andosols. Environmental isotopes such as Deuterium and 18-O are direct tracers for water and useful on analyzing water-soil interactions. This work explores, for the first time, the efficiency of cryogenic vacuum extraction to remove water from two contrasting soil types (Arenosols, Andosols) at five soil water retention energies (from −1500 to −33 kPa). Two experiments were carried out to analyse the impact of extraction time, and initial water content on the amount of extracted water, while a third experiment tested whether the cryogenic vacuum extraction changed the isotopic ratios after extraction. Minimum extraction times to recover over 90% of water initially in the soil samples were 40–50 min and varied with soil texture. Minimum volume for very dry soils were 0.2 mL (loamy sand) and 1 mL (loam). After extraction, the difference between the isotope standard and the isotopic values after extraction was acceptable. Thus, we recommend this procedure for soils derived from volcanic ashes.

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Water Scarcity and the Impact of the Mining and Agricultural Sectors in Chile

2016 , Douglas Aitken , Diego Rivera Salazar , GODOY FAUNDEZ, ALEX ORIEL , Eduardo Holzapfel

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Exploring soil databases: a self-organizing map approach

2015 , Diego Rivera Salazar , M. Sandoval , GODOY FAUNDEZ, ALEX ORIEL

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Legal disputes as a proxy for regional conflicts over water rights in Chile

2016 , Diego Rivera Salazar , GODOY FAUNDEZ, ALEX ORIEL , Mario Lillo , Amaya Alvez , Verónica Delgado , Consuelo Gonzalo-Martín , Ernestina Menasalvas , Roberto Costumero , Ángel García-Pedrero

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Uncertainty in a monthly water balance model using the generalized likelihood uncertainty estimation methodology

2015 , Diego Rivera Salazar , Yessica Rivas , GODOY FAUNDEZ, ALEX ORIEL

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