Analysis of Reference Evapotranspiration under Climate Change Conditions in The Lerma-Chapala Basin, Mexico
Journal Title: American journal of Engineering Research - Year 2017, Vol 6, Issue 3
Abstract
Evapotranspiration is one of the main factors determining the crop water requirements. Evapotranspiration depends on climate conditions, which suggest that under climate change conditions, it can increase in the future threatening the satisfaction of the crop water needs especially in the case of rainfed agriculture. In this manner, the objective of the study was to analyze the behavior of the reference evapotranspiration (ETo) in the Lerma-Chapala basin using the FAO Penman-Monteith method and then evaluates the sensitivity of ETo to changes in the climate conditions as predicted by global circulation models. Results show that during the rainy season the evapotranspiration in the Lerma-Chapala basin is highly variable, showing a decreasing pattern from May to September. Sensitivity analysis showed that ETo is very sensitive to increases in temperature and radiation as well as to decrease in air humidity. Impacts on ETo due to simultaneous changes in the behavior of multiple variables are greater than that observed when only presents an increase in temperature. Therefore, it could be expected that under the climate change conditions predicted for the study area at the end of this century, a higher evapotranspiration could be observed.
Authors and Affiliations
Gerardo Núñez-González
Keywords
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