EAN: 9783319088570

SYSTEM ENGINEERING APPLIED TO FUENMAYOR KARST A...

This thesis tackles fundamental questions concerning the discharge of a pre-Pyrenean karst
aquifer system and an Antarctic glacier system  utilizing a system engineering methodology and
data-driven approach. It presents for the first time a simplified and effective linear transfer
function for karst aquifers. The author provides detailed wavelet spectrum results  which
reveal certain non-linearities in drought periods. In addition  structures based on
Hammerstein-Wiener blocks have yielded a nonlinear model that is substantially more efficient
than its linear counterparts.Another pioneering finding is the use of wavelet coherence between
glacier discharge and air temperature to estimate SEC (Seasonal Effective Core) boundaries. The
yearly SEC is essential to obtaining a model based on Hammerstein-Wiener structures  which
offers considerably higher efficiency. Moreover  two different types of glacier dynamics have
been discovered (over damped and overshoot)  depending on the annual cycle and the SEC average
temperature.

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