Predicting Diel, Diurnal and Nocturnal Dynamics of Dissolved Oxygen and Chlorophyll-a Using Regression Models and Neural Networks

KARAKAYA N., EVRENDİLEK F., GÜNGÖR K., Onal D.

CLEAN-SOIL AIR WATER, cilt.41, sa.9, ss.872-877, 2013 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 41 Sayı: 9
  • Basım Tarihi: 2013
  • Doi Numarası: 10.1002/clen.201200683
  • Dergi Adı: CLEAN-SOIL AIR WATER
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.872-877
  • Anahtar Kelimeler: Data-driven modeling, Lake water quality, Non-linear dynamics, Time series data, NET ECOSYSTEM EXCHANGE, EDDY COVARIANCE, CARBON-DIOXIDE, WATER-QUALITY, ANNUAL SUMS, LAKE, RESPIRATION, FORESTS, FLUXES, BOLU
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

Human-induced and natural interruptions with continuous streams of observational data necessitate the development of gap-filling and prediction strategies towards better understanding, monitoring and management of aquatic systems. This study quantified the efficacy of multiple non-linear regression (MNLR) versus artificial neural network (ANN) models as well as the temporal partitioning of diurnal versus nocturnal data for the predictions of chlorophyll-a (chl-a) and dissolved oxygen (DO) dynamics. The temporal partitioning increased the predictive performances of the best MNLR models of diurnal DO by 45% and nocturnal DO by 4%, relative to the best diel MNLR model of diel DO (r(adj)(2) = 68.8%). The ANN-based predictions had a higher predictive power than the MNLR-based predictions for both chl-a and DO except for diurnal DO dynamics. The best ANNs based on independent validations were multilayer perceptron (MLP) for diel chl-a, generalized feedforward (GFF) for diurnal and nocturnal chl-a, MLP for diel DO, GFF for diurnal DO, and MLP for nocturnal DO.