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Recursive Streamflow Forecasting

RRP $254.99

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Record-breaking floods in many places in the world in recent years have underlined the need for accurate flood forecasting models. By knowing in advance when, where and at what level a river will crest, appropriate protection works can be planned and damage to life and property can be reduced. This book presents a streamflow model technique, which has been adopted by various hydrological forecasting services. The physics-based structural-stochastic forecasting model is formulated with discrete data, accounts for model uncertainties, is adaptive, and mathematically accessible. The reader is guided gradually through the model building and forecasting process and through the generation of the relevant system matrices with the enclosed MATLAB codes. The many examples and sample inflow and outflow data illustrate real life flow routing problems in Europe and the US and allow, with the adaptable MATLAB codes, the simulation of streamflows and the creation of real-time hydrological forecasts.

This volume was developed as course material for hydroinformatics, surface hydrology and water management courses. It is moreover intended for hydrologists and civil, environmental and agricultural engineers, who are involved with flood forecasting and water resources management. A CD-ROM with MATLAB codes is included.


Value Stream Design

RRP $82.95

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Value stream design is increasingly asserting itself as the key approach for production optimization, but there has never been a detailed and systematic presentation of the value stream method before - a gap that has now been filled by this book.

The author provides an easily comprehensible code of practice for the effective analysis of production processes, product family-oriented factory structuring and the target-oriented development of an ideal future state of production. The book plausibly conveys ten design guidelines for production optimization with corresponding equations, descriptive illustrations and industrial examples well-proven in numerous industrial projects. It addresses the professional public, practitioners wishing to avoid waste and systematically improve their factories' value streams, and students - tomorrow's practitioners.

In contrast to other publications, this book complements the value stream analysis and its unique compact visualization of the entire production process by a detailed illustration of the information flow and a comprehensive discussion of the operator balance chart. The »traditional« concept of value stream design is significantly expanded with a view to its applicability in complex productions by way of methodological innovation and further development concerning campaign formation, value stream management and technological process integration. The method is embedded in a comprehensive procedural approach for factory planning, starting with the definition of the desired lean production goals.


Evaluation Of Wet Testing As An Indicator Of Aquatic Health In Effluent-dominated Streams

RRP $54.95

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This project evaluated the quality of data needed to determine relationships between chronic Whole Effluent Toxicity (WET) test results and in-stream biological condition. A data quality objectives approach was used, which included several proposed measurement quality objectives (MQOs) that specified desired precision, bias, and sensitivity of methods used. Six facilities (four eastern and two western U.S.) participated in this study, all having design effluent concentrations > 60% of the stream flow. In accordance with a Quality Assurance Project Plan most of the facilities completed four quarters of chronic Ceriodaphnia dubia, and Pimephales promelas (fathead minnow) WET tests, and three quarters of Selenastrum capricornutum (green algae) WET testing following the most recent USEPA methods. Several other WET tests were conducted to address MQOs including splits, duplicates, and blind positive and negative controls. Macroinvertebrate, fish, and periphyton bioassessments were conducted at multiple locations up and downstream of each facility following the most recent USEPA Office of Water bioassessment protocols.
Test acceptance criteria were met for most WET tests, however, this study demonstrated the need to incorporate other MQOs in a full study (such as minimum and maximum percent significant differences and performance on blind samples) to ensure accurate interpretation of effluent toxicity. More false positives, lower test endpoint (i.e., higher toxicity), and more "failed" (non-compliant) tests were observed using No Observed Effect Concentrations (NOEC) as compared to IC25s (concentration causing >= 25% decrease in organism response compared to controls). Algae tests often yielded the most effluent toxicity in this study, however, this test was most susceptible to false positives and high inter-laboratory variability. WET test results exhibited few relationships with bioassessment results, even when incorporating actual effluent dilution. Neither frequency of WET non-compliance nor magnitude of WET were clearly related to differences in biological condition up and downstream of a discharge for the most part. Macroinvertebrate assessments were most able to discriminate small changes downstream of the effluent, followed by periphyton and then fish. The sampling methods used were robust but a full study should collect more field replicates up and downstream of each discharge to increase detection power. Macroinvertebrate and periphyton assessments together appeared to be sufficient to address project objectives. Fish assessments could be useful as well but would entail more effort and cost per site than expended in this project, to be useful.



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