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Accueil du site → Master → Etats Unis → 2018 → Effects of changing available water regimes on riparian vegetation in the Mesilla Valley Basin Aquifer, New Mexico, USA

New Mexico State University (2018)

Effects of changing available water regimes on riparian vegetation in the Mesilla Valley Basin Aquifer, New Mexico, USA

Aracely Tellez

Titre : Effects of changing available water regimes on riparian vegetation in the Mesilla Valley Basin Aquifer, New Mexico, USA

Auteur : Aracely Tellez

Université de soutenance : New Mexico State University

Grade : Mastr of Science (MS) 2018

Résumé
There is a need to understand the responses of riparian vegetation to fluctuating levels of surface and groundwater interactions from excessive drought conditions. I processed aerial photography from 2005 and 2014 through Geographical Information System to calculate changes in vegetation with the use of unsupervised and supervised classification methods. These methods were compared to identify the most accurate classification. Unsupervised classification had higher overall accuracies and kappa coefficient values. Both classifications showed decline in large vegetation and increase in dead vegetation and bare land between 2005 and 2014. Additionally, both annual flow and well data were compared to the difference in vegetation cover from 2005 and 2014 to identify if a relationship was present. Riparian Evapotranspiration (ET) was also calculated as most of water lost in arid lands comes from ET. Riparian ET values accounted for the smallest portion of the ET water budget (approx. 700 AF/month). Both surface water and groundwater decreased in water availability between 2000-2015. It is apparent that with frequent and longer lasting droughts, riparian zones in New Mexico and the Southwest are expected to continue to experience water scarcity issues in the future

Présentation (WorldCat)

Annonce (NMSU Library)

Page publiée le 3 novembre 2018, mise à jour le 23 décembre 2019