Refining the Committee Approach and Uncertainty Prediction in Hydrological Modelling: IHE Delft PhD Thesis Series
Autor Nagendra Kayasthaen Limba Engleză Paperback – 5 ian 2015
Another topic addressed is the prediction of hydrologic models’ uncertainty. The traditionally used Monte Carlo method is based on the past data and cannot be directly used for estimation of model uncertainty for the future model runs during its operation. In this thesis the so-called MLUE (Machine Learning for Uncertainty Estimation) approach is further explored and extended; in it the machine learning techniques (e.g. neural networks) are used to encapsulate the results of Monte Carlo experiments in a predictive model that is able to estimate uncertainty for the future states of the modelled system.
Furthermore, it is demonstrated that a committee of several predictive uncertainty models allows for an increase in prediction accuracy. Catchments in Nepal, UK and USA are used as case studies.
In flood modelling hydrological models are typically used in combination with hydraulic models forming a cascade, often supported by geospatial processing. For uncertainty analysis of flood inundation modelling of the Nzoia catchment (Kenya) SWAT hydrological and SOBEK hydrodynamic models are integrated, and the parametric uncertainty of the hydrological model is allowed to propagate through the model cascade using Monte Carlo simulations, leading to the generation of the probabilistic flood maps. Due to the high computational complexity of these experiments, the high performance (cluster) computing framework is designed and used.
This study refined a number of hydroinformatics techniques, thus enhancing uncertainty-based hydrological and integrated modelling.
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Specificații
ISBN-13: 9781138027466
ISBN-10: 1138027464
Pagini: 212
Ilustrații: NO
Dimensiuni: 174 x 246 mm
Greutate: 0.36 kg
Ediția:1
Editura: CRC Press
Colecția CRC Press
Seria IHE Delft PhD Thesis Series
ISBN-10: 1138027464
Pagini: 212
Ilustrații: NO
Dimensiuni: 174 x 246 mm
Greutate: 0.36 kg
Ediția:1
Editura: CRC Press
Colecția CRC Press
Seria IHE Delft PhD Thesis Series
Public țintă
PostgraduateCuprins
Summary
1 Introduction
2 Conceptual and data-driven hydrological modelling
3 Committees of hydrological models
4 Hybrid committees of hydrological models
5 Model parametric uncertainty and effects of sampling strategies
6 Prediction of uncertainty by machine learning techniques
7 Committees of models predicting models' uncertainty
8 Integration of hydrological and hydrodynamic models and their uncertainty in inundation modelling
9 Conclusions and recommendations
1 Introduction
2 Conceptual and data-driven hydrological modelling
3 Committees of hydrological models
4 Hybrid committees of hydrological models
5 Model parametric uncertainty and effects of sampling strategies
6 Prediction of uncertainty by machine learning techniques
7 Committees of models predicting models' uncertainty
8 Integration of hydrological and hydrodynamic models and their uncertainty in inundation modelling
9 Conclusions and recommendations
Descriere
This study concentrates on: (i) committee modelling of hydrological models, (ii) hybrid committee hydrological models, (iii) influence of sampling strategies on prediction uncertainty of hydrological models, (iv) uncertainty prediction using machine learning techniques, (v) committee of predictive uncertainty models and (vi) flood inundation model and their uncertainty. This thesis is a contribution to hydroinformatics, which aims to connect various scientific disciplines: hydrological modelling, hydrodynamic modelling, multi-model averaging, data driven models, hybrid hydrological models, uncertainty analysis and high performance computing. The conclusions drawn allow for advancing the theory and practice of hydrological and integrated modelling. The developed software components is made available for public use and can be used by the researchers and practitioners to advance the mentioned areas further.