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1999 | Buch

Water Quality Monitoring Network Design

verfasst von: Nilgun B. Harmancioglu, Okan Fistikoglu, Sevinc D. Ozkul, Vijay P. Singh, M. Necdet Alpaslan

Verlag: Springer Netherlands

Buchreihe : Water Science and Technology Library

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Über dieses Buch

In recent years, the adequacy of collected water quality data and the performance of existing monitoring networks have been seriously evaluated for two basic reasons. First, an efficient information system is required to satisfy the needs of water quality management plans and to aid in the decision-making process. Second, this system has to be realized under the constraints of limited financial resources, sampling and analysis facilities, and manpower. Problems observed in available data and shortcomings of current networks have led researchers to focus more critically on the design procedures used.
The book is intended to present an up-to-date overview of the current network design procedures and develop basic guidelines to be followed in both the design and the redesign of water quality monitoring networks. The book treats the network design problem in a comprehensive and systematic framework, starting with objectives of monitoring and elaborating on various technical design features, e.g. selection of sampling sites, sampling frequencies, variables to be monitored, and sampling duration. The design procedures presented are those that the authors have recently applied in a number of national and international projects on the design and redesign of water quality monitoring networks. Thus, the book covers real case studies where not only the methods described in the earlier titles are used but also new techniques are introduced. Where earlier methods are used, they are assessed with respect to their efficiency and applicability to real case problems.
Audience: Essentially, the framework adopted in the book applies as well to other hydrometric data collection networks besides those of water quality. In this respect, it is expected that planners, designers, scientists, and engineers who are involved in hydrometric network design will benefit from the in-depth approach assumed in this book. It will also be of interest to research and data centers, international programs and organizations related to environmental monitoring. The book may also be used as a reference text in graduate courses of water resources and environmental engineering programs.

Inhaltsverzeichnis

Frontmatter
Chapter 1. Introduction
Abstract
Assessment of water resources requires knowledge and full understanding of both the water quantity and the water quality processes. The quality of water itself is a significant factor to put limits on the amount of available water that may be used for various purposes. That is, what nature provides as available quantities may be reduced if the quality of water does not permit its use for a specific purpose. This implies extra costs in the development of the resource to meet both the quantity and quality requirements imposed by the particular need. Thus, water quality directly affects the quantity of water that can be employed for various purposes. This fact further implies both the technical and the economical impact of water quality upon attempts at maximal development of the natural resource in the general perspective.
Nilgun B. Harmancioglu, Okan Fistikoglu, Sevinc D. Ozkul, Vijay P. Singh, M. Necdet Alpaslan
Chapter 2. Current Status of Monitoring Networks and Design Procedures
Abstract
Considering the current problems in water quality management, this chapter is intended to review the current status of monitoring networks and design procedures on examples from developed and developing countries. This review covers details of the network design problem with respect to monitoring objectives, sampling sites, time frequencies, sampling duration, and variables to be sampled. Shortcomings of current monitoring programs and design procedures are assessed to infer on requirements for better designs.
Nilgun B. Harmancioglu, Okan Fistikoglu, Sevinc D. Ozkul, Vijay P. Singh, M. Necdet Alpaslan
Chapter 3. Network Assessment and Redesign
Abstract
Two major conclusions to be drawn from the review presented in Chapter 2 are that: a) significant problems exist in available water quality data; b) current monitoring networks reflect several shortcomings that hinder their efficiency and cost-effectiveness. The inevitable consequence of these two problems is the significant gap between information needs on water quality and the information produced by current systems of data collection. This difficulty has led to a critical assessment of methodologies used in network design. Eventually, the majority of developed and developing countries have started to evaluate their current monitoring practices and to redesign their networks (National Research Council, 1994; Ward, 1996; Ward et al., 1989 and 1994; WMO, 1994; Whitfield, 1997; Villars and Groot, 1997; Adriaanse et al., 1995; Niederlander et al., 1996; Harmancioglu and Alpaslan, 1997). Thus, what had earlier been a “design” problem in water quality monitoring has recently turned out to be an “assessment and redesign” problem. This current trend in network design underlies the basic approach adopted in this work, namely that the “design” process is treated within an “assessment and redesign” perspective.
Nilgun B. Harmancioglu, Okan Fistikoglu, Sevinc D. Ozkul, Vijay P. Singh, M. Necdet Alpaslan
Chapter 4. Basic Tools — Statistics and Modeling
Abstract
Design of a water quality monitoring network is an iterative process. It evolves in time in response to changing data needs, objectives of monitoring, economic vagaries, changing force functions, and so on. The design must reflect the societal need. In this sense, one might even say the design process is a state of mind.
Nilgun B. Harmancioglu, Okan Fistikoglu, Sevinc D. Ozkul, Vijay P. Singh, M. Necdet Alpaslan
Chapter 5. Definition of Monitoring Objectives
Abstract
Definition of monitoring objectives is the initial step that plays a key role in water quality monitoring network design and redesign. The design process becomes complex basically due to the difficulties involved in determination of objectives. As emphasized in Chapter 2, one of the most significant problems associated with current networks is the lack of a precise and proper definition of monitoring objectives. Objectives delineate the eventual information expected from the network, and failure in specification of the expected information leads to failure of the network itself (Harmancioglu et al., 1992). Essentially, definition of monitoring goals is significant both for the design and the operation of a network. A clear statement of objectives can ensure the collection of only the necessary data and can avoid needless and wasteful expenditures in time, money, and cost (Harmancioglu et al., 1998).
Nilgun B. Harmancioglu, Okan Fistikoglu, Sevinc D. Ozkul, Vijay P. Singh, M. Necdet Alpaslan
Chapter 6. Assessment of Sampling Sites
Abstract
Assessment of an existing network starts with a review of monitoring objectives along with a thorough survey of social, legal, economic, political, administrative, and operational constraints. The next step is devoted to the evaluation of technical features that make up a network. This is the stage where sampling sites and frequencies, variables sampled and sampling duration are assessed.
Nilgun B. Harmancioglu, Okan Fistikoglu, Sevinc D. Ozkul, Vijay P. Singh, M. Necdet Alpaslan
Chapter 7. Selection of Variables to be Sampled
Abstract
The selection of water quality variables to be sampled is a highly complicated issue since there are several variables to choose from. A brief discussion on current selection procedures is already presented in Sections 2.2 and 2.3.5 of Chapter 2.
Nilgun B. Harmancioglu, Okan Fistikoglu, Sevinc D. Ozkul, Vijay P. Singh, M. Necdet Alpaslan
Chapter 8. Assessment of Temporal Frequencies
Abstract
As discussed in section 2.2.3 of Chapter 2, temporal frequencies of sampling are significant with respect to two important characteristics of a monitoring network: (a) cost-effectiveness, and (b) information to be extracted from available data (data utility). Thus, selection and assessment of temporal design criteria have received considerable attention from designers and researchers.
Nilgun B. Harmancioglu, Okan Fistikoglu, Sevinc D. Ozkul, Vijay P. Singh, M. Necdet Alpaslan
Chapter 9. Assessment of Combined Space/Time Design Criteria
Abstract
Some design procedures combine both the spatial and the temporal design criteria to evaluate space-time trade-offs. The approach in such combined design programs is to compensate for lack of information with respect to one dimension by increasing the intensity of efforts in the other dimension (Harmancioglu and Alpaslan, 1992).
Nilgun B. Harmancioglu, Okan Fistikoglu, Sevinc D. Ozkul, Vijay P. Singh, M. Necdet Alpaslan
Chapter 10. Transfer of Data into Information
Abstract
Monitoring networks are designed and operated to eventually obtain information on water quality. This information is contained in the data collected by the network and has to be extracted from the data to produce the final output of a data management system described in Fig.1.1 of Chapter 1. Essentially, these methods do not only serve to produce the output information but they also help to assess the efficiency of the monitoring system by which the data are collected.
Nilgun B. Harmancioglu, Okan Fistikoglu, Sevinc D. Ozkul, Vijay P. Singh, M. Necdet Alpaslan
Chapter 11. Conclusions and Recommendations
Abstract
The studies leading to the present book have derived their impetus from the recommendations expressed at international levels towards improved availability of information on the water environment for better water management (Harmancioglu et al., 1998). Examples include the Dublin Statement of the International Conference on Water and Environment; Agenda 21 of UNCED; various workshops and meetings held by WMO, WHO, UNESCO, UNEP, the World Bank, IAHS, and IAWQ; recent Directives foreseen by the EU Community; and a number of international programmes such as the EEA (European Environmental Agency) work programme, WHYCOS of WMO and the World Bank, GRID and GEMS of UNEP, to name but a few (see Chapter 1). Essentially, Chapter 18 of Agenda 21 best describes the problem associated with current information systems: information on the hydrologic cycle, including both water quantity and water quality constitutes the basis for effective water management. However, current monitoring systems experience a declining trend in terms of effectiveness; this is in contrast to the increasing trend in our demand for water. This situation has resulted in significant emphasis directed towards assessment and redesign of the current water quality monitoring networks. The basic problem, in this respect, is that generally accepted guidelines do not exist on how the assessment and redesign processes should be addressed.
Nilgun B. Harmancioglu, Okan Fistikoglu, Sevinc D. Ozkul, Vijay P. Singh, M. Necdet Alpaslan
Backmatter
Metadaten
Titel
Water Quality Monitoring Network Design
verfasst von
Nilgun B. Harmancioglu
Okan Fistikoglu
Sevinc D. Ozkul
Vijay P. Singh
M. Necdet Alpaslan
Copyright-Jahr
1999
Verlag
Springer Netherlands
Electronic ISBN
978-94-015-9155-3
Print ISBN
978-90-481-5150-9
DOI
https://doi.org/10.1007/978-94-015-9155-3