Design Aspects of Hydrological Networks
Design Aspects of Hydrological Networks

Author: J. W. van der Made

Publisher:

Published: 1986

Total Pages: 200

ISBN-13:

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The design of hydrological networks takes place between the field of the phenomena to be measured on the one hand and the needs to measure on the other hand. Apart from a classification of the networks according to the variables to be measured one can distinguish the networks according to their objective, going from short term objectives, such as forecasting and operational management of water projects to long term objectives, such as trend detection. Again another distinction can be made in networks for water quantity and water quality data.

Entropy Applications in Environmental and Water Engineering
Entropy Applications in Environmental and Water Engineering

Author: Huijuan Cui

Publisher: MDPI

Published: 2019-03-07

Total Pages: 512

ISBN-13: 3038972223

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Entropy theory has wide applications to a range of problems in the fields of environmental and water engineering, including river hydraulic geometry, fluvial hydraulics, water monitoring network design, river flow forecasting, floods and droughts, river network analysis, infiltration, soil moisture, sediment transport, surface water and groundwater quality modeling, ecosystems modeling, water distribution networks, environmental and water resources management, and parameter estimation. Such applications have used several different entropy formulations, such as Shannon, Tsallis, Rényi, Burg, Kolmogorov, Kapur, configurational, and relative entropies, which can be derived in time, space, or frequency domains. More recently, entropy-based concepts have been coupled with other theories, including copula and wavelets, to study various issues associated with environmental and water resources systems. Recent studies indicate the enormous scope and potential of entropy theory in advancing research in the fields of environmental and water engineering, including establishing and explaining physical connections between theory and reality. The objective of this Special Issue is to provide a platform for compiling important recent and current research on the applications of entropy theory in environmental and water engineering. The contributions to this Special Issue have addressed many aspects associated with entropy theory applications and have shown the enormous scope and potential of entropy theory in advancing research in the fields of environmental and water engineering.

Artificial Neural Networks in Hydrology
Artificial Neural Networks in Hydrology

Author: R.S. Govindaraju

Publisher: Springer Science & Business Media

Published: 2013-03-09

Total Pages: 338

ISBN-13: 9401593418

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R. S. GOVINDARAJU and ARAMACHANDRA RAO School of Civil Engineering Purdue University West Lafayette, IN. , USA Background and Motivation The basic notion of artificial neural networks (ANNs), as we understand them today, was perhaps first formalized by McCulloch and Pitts (1943) in their model of an artificial neuron. Research in this field remained somewhat dormant in the early years, perhaps because of the limited capabilities of this method and because there was no clear indication of its potential uses. However, interest in this area picked up momentum in a dramatic fashion with the works of Hopfield (1982) and Rumelhart et al. (1986). Not only did these studies place artificial neural networks on a firmer mathematical footing, but also opened the dOOf to a host of potential applications for this computational tool. Consequently, neural network computing has progressed rapidly along all fronts: theoretical development of different learning algorithms, computing capabilities, and applications to diverse areas from neurophysiology to the stock market. . Initial studies on artificial neural networks were prompted by adesire to have computers mimic human learning. As a result, the jargon associated with the technical literature on this subject is replete with expressions such as excitation and inhibition of neurons, strength of synaptic connections, learning rates, training, and network experience. ANNs have also been referred to as neurocomputers by people who want to preserve this analogy.

Integrated Approach to Environmental Data Management Systems
Integrated Approach to Environmental Data Management Systems

Author: Nilgun B. Harmanciogammalu

Publisher: Springer Science & Business Media

Published: 2012-12-06

Total Pages: 550

ISBN-13: 9401156166

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An integrated approach to environmental data management is necessitated by the complexity of the environmental problems that need to be addresses, coupled with the interdisciplinary approach that needs to be adopted to solve them. Agenda 21 of the Rio Environmental Conference mandated international programmes and organizations to take steps to develop common data and information management plans, and steps have been taken in this direction. The key word that defines the framework of the present book is `integration'. The book establishes the basics of integrated approaches and covers environmental data management systems within that framework, covering all aspects of data management, from objectives and constraints, design of data collection networks, statistical and physical sampling, remote sensing and GIS, databases, reliability of data, data analysis, and the transformation of data into information.