Download or read book Rainfall runoff Modelling in Gauged and Ungauged Catchments written by Thorsten Wagener and published by World Scientific. This book was released on 2004 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: This important monograph is based on the results of a study on the identification of conceptual lumped rainfall-runoff models for gauged and ungauged catchments. The task of model identification remains difficult despite decades of research. A detailed problem analysis and an extensive review form the basis for the development of a Matlab- modelling toolkit consisting of two components: a Rainfall-Runoff Modelling Toolbox (RRMT) and a Monte Carlo Analysis Toolbox (MCAT). These are subsequently applied to study the tasks of model identification and evaluation. A novel dynamic identifiability approach has been developed for the gauged catchment case. The theory underlying the application of rainfall-runoff models for predictions in ungauged catchments is studied, problems are highlighted and promising ways to move forward are investigated. Modelling frameworks for both gauged and ungauged cases are developed. This book presents the first extensive treatment of rainfall-runoff model identification in gauged and ungauged catchments."

Download or read book Hydrologic Modeling of Gauged and Ungauged Catchments written by Shibayan Sarkar and published by LAP Lambert Academic Publishing. This book was released on 2010 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describe the modeling approach for the flood flows for gauged and ungauged catchments. This book comprise of modeling approaches of intensity duration frequency curve, unit hydrograph, geomorphologic instantaneous unit hydrograph, rainfall excess computations, parameter estimation, hydraulic modeling, etc. Apart from this, application of Geographic Information System (GIS) in surface hydrology is described in the book. This book will provide the good understanding of using the hydrologic models for estimating the flood flows. For replication of the approches, computer programmes appended in the book will be very helpful to users. This book will be beneficial to the hydrologist, researchers, civil and agricultural engineers.

Download or read book Rainfall runoff Modelling in Gauged and Ungauged Catchments written by Thorsten Wagener and published by . This book was released on 2004 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Runoff Prediction in Ungauged Basins written by Günter Blöschl and published by Cambridge University Press. This book was released on 2013-04-18 with total page 491 pages. Available in PDF, EPUB and Kindle. Book excerpt: Predicting water runoff in ungauged water catchment areas is vital to practical applications such as the design of drainage infrastructure and flooding defences, runoff forecasting, and for catchment management tasks such as water allocation and climate impact analysis. This full colour book offers an impressive synthesis of decades of international research, forming a holistic approach to catchment hydrology and providing a one-stop resource for hydrologists in both developed and developing countries. Topics include data for runoff regionalisation, the prediction of runoff hydrographs, flow duration curves, flow paths and residence times, annual and seasonal runoff, and floods. Illustrated with many case studies and including a final chapter on recommendations for researchers and practitioners, this book is written by expert authors involved in the prestigious IAHS PUB initiative. It is a key resource for academic researchers and professionals in the fields of hydrology, hydrogeology, ecology, geography, soil science, and environmental and civil engineering.

Download or read book Predictions in Ungauged Basins written by Murugesu Sivapalan and published by . This book was released on 2006 with total page 534 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Distributed Hydrologic Modeling for Streamflow Prediction at Ungauged Basins written by Christina Bandaragoda and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Hydrologic modeling and streamflow prediction of ungauged basins is an unsolved scientific problem as well as a policy-relevant science theme emerging as a major challenge to the hydrologic community. One way to address this problem is to improve hydrologic modeling capability through the use of spatial data and spatially distributed physically based models. This dissertation is composed of three papers focused on 1) the use of spatially distributed hydrologic models with spatially distributed precipitation inputs, 2) advanced multi-objective calibration techniques that estimate parameter uncertainty and use stream gauge and temperature data from multiple locations, and 3) an examination of the relationship between high-resolution soils data and streamflow recession for use in a priori parameter estimation in ungauged catchments. This research contributes to the broad quest to reduce uncertainty in predictions at ungauged basins by integrating developments of innovative modeling techniques with analyses that advance our understanding of natural systems.

Download or read book Circular Statistics in R written by Arthur Pewsey and published by OUP Oxford. This book was released on 2013-09-26 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt: Circular Statistics in R provides the most comprehensive guide to the analysis of circular data in over a decade. Circular data arise in many scientific contexts whether it be angular directions such as: observed compass directions of departure of radio-collared migratory birds from a release point; bond angles measured in different molecules; wind directions at different times of year at a wind farm; direction of stress-fractures in concrete bridge supports; longitudes of earthquake epicentres or seasonal and daily activity patterns, for example: data on the times of day at which animals are caught in a camera trap, or in 911 calls in New York, or in internet traffic; variation throughout the year in measles incidence, global energy requirements, TV viewing figures or injuries to athletes. The natural way of representing such data graphically is as points located around the circumference of a circle, hence their name. Importantly, circular variables are periodic in nature and the origin, or zero point, such as the beginning of a new year, is defined arbitrarily rather than necessarily emerging naturally from the system. This book will be of value both to those new to circular data analysis as well as those more familiar with the field. For beginners, the authors start by considering the fundamental graphical and numerical summaries used to represent circular data before introducing distributions that might be used to model them. They go on to discuss basic forms of inference such as point and interval estimation, as well as formal significance tests for hypotheses that will often be of scientific interest. When discussing model fitting, the authors advocate reduced reliance on the classical von Mises distribution; showcasing distributions that are capable of modelling features such as asymmetry and varying levels of kurtosis that are often exhibited by circular data. The use of likelihood-based and computer-intensive approaches to inference and modelling are stressed throughout the book. The R programming language is used to implement the methodology, particularly its "circular" package. Also provided are over 150 new functions for techniques not already covered within R. This concise but authoritative guide is accessible to the diverse range of scientists who have circular data to analyse and want to do so as easily and as effectively as possible.

Download or read book Streamflow Estimation in Ungauged Catchments Through the Process of Regionalization written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Precise and dependable long-term streamflow record is a vital component in the modelling of hydrologic cycle. Quantitative and qualitative information regarding streamflow is needed for several practical application intended at various locations. However, lack of historical streamflow records makes its prediction in ungauged catchments a daunting task. Most of the catchments present across the globe are either partially gauged or completely ungauged. The scenario worsens in case of developing countries. The subject of 'prediction in ungauged basins' (PUB) is not prevalent in India. Regionalization is an alternative way for streamflow prediction in ungauged catchments. The present study deals with few regionalization approach for daily streamflow estimation in thirty-two identified catchments located in the Eastern and Southern India. The first category of regionalization i.e. hydrologic model-dependent approach is carried out using spatial proximity [Inverse Distance Weighted (IDW), Kriging and Global mean], regression analysis and physical similarity in conjunction with Soil and Water Assessment Tool (SWAT) for streamflow estimation in each catchment considered as ungauged in turn. The other type is hydrologic model-independent regionalization which is carried out using Flow Duration Curve (FDC). Area-Index, IDW, Kriging and regression analysis are the techniques used for information transfer from donor to receiver catchments. IDW and Kriging are the two techniques based on geographical distance between gauged and ungauged catchments produced superior results among all the implemented techniques in terms of Nash-Sutcliffe efficiency (NSE), Root Mean Square Error (RMSE)-observations standard deviation ratio (RSR) and Percent Bias (PBIAS). SWAT based regionalization techniques displayed better capability for capturing the variation in daily streamflow than regional FDC based approach. However, Information transfer between dissimilar catchments is likely to produce in

Download or read book Congo Basin Hydrology Climate and Biogeochemistry written by Raphael M. Tshimanga and published by John Wiley & Sons. This book was released on 2022-03-22 with total page 596 pages. Available in PDF, EPUB and Kindle. Book excerpt: New scientific discoveries in the Congo Basin as a result of international collaborations The Congo is the world's second largest river basin and home to 120 million people. Understanding the cycling of water, sediments, and nutrients is important as the region faces climatic and anthropogenic change. Congo Basin Hydrology, Climate, and Biogeochemistry: A Foundation for the Future explores variations in and influences on rainfall, hydrology and hydraulics, and sediment and carbon dynamics. It features contributions from experts in the region and their international collaborators. Volume highlights include: New in-situ and remotely sensed measurements and model results Use of historic data to assess precipitation and hydrologic changes Exploration of water exchange between wetlands and rivers Biogeochemical processes in the Congo's forests and wetlands A scientific foundation for hydrologic resource management in the region Studies from different parts of the Congo river and its adjoining basins This book is available in English and French. The American Geophysical Union promotes discovery in Earth and space science for the benefit of humanity. Its publications disseminate scientific knowledge and provide resources for researchers, students, and professionals. Find out more about this book in this short video and this article.

Download or read book A review of methods of hydrological estimation at ungauged sites in India written by Ramakar Jha and published by IWMI. This book was released on 2008-06-27 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: The paper reviews the existing methods used in India for estimation of flow characteristics at ungauged sites. It focuses on low and high flows, long-term mean flow and flow duration curves. Since it lists the actual formulae, it can be used as a quick reference guide for selecting a suitable technique for various geographical regional and/or river basins in India.

Download or read book Catchment Classification Applied to the Estimation of Hydrological Parameters at Ungauged Catchments written by Donald H. Burn and published by . This book was released on 1992 with total page 71 pages. Available in PDF, EPUB and Kindle. Book excerpt: Estimates of hydrological parameters at ungauged sites have traditionally been obtained from regression equations. This study investigates alternative methods based on the classification of catchments according to their flow regime, the assignment of ungauged catchments to a class based on physical characteristics of the catchment, and the use of similarity measures to transfer parameters from gauged to ungauged catchments. This report considers the methods that can be adopted in this type of approach, and the many variations that must be considered in their implementation. The methods are examined using a set of 99 catchments from the UK, and are seen to be efficacious in estimating the unit hydrograph time to peak and standard percentage runoff, as defined by the UK Flood Studies Report. A step-by-step guide and worked example show how the method can be applied in practice.

Download or read book Catchment Hydrological Modelling written by Shreedhar Maskey and published by Elsevier. This book was released on 2022-04-12 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: Catchment Hydrological Modelling: The Science and Art covers various methods (and equations) for modeling all components of a CHM. Readers are presented with multiple methods and approaches to modeling the same component, allowing them to distinguish the differences between methods. The books also provides a clear understanding of what makes some commonly used hydrological models similar or different and what their strengths and weaknesses may be. This comprehensive guide contains questions and answers in each chapter, along with concepts and detailed equations that are fundamental to understanding CHM. This book is useful to students and professionals in the fields of catchment and hydrology, as well as environmental and civil engineers. Includes practical advice on developing and/or applying CHM models, empowering readers to do so themselves Presents practical aspects of catchment modeling, from model structure design to model operation Presents hydrological catchment modeling in a clear and coherent way while also describing different approaches for the same processes

Download or read book Predictions in Ungauged Basins written by Stewart W. Franks and published by International Assn of Hydrological Sciences. This book was released on 2005 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hydrological prediction where data are available is relatively easily achieved, albeit subject to uncertainty that is often unquantified. But, ungauged catchments (by far the majority) present major difficulties for hydrological prediction, hence the IAHS Predictions in Ungauged Basins (PUB) initiative. This volume combines chapters presenting innovative theoretical and practical possibilities of different approaches for prediction, with contributions describing the differing perspectives and specific needs of Australia and Japan in particular.

Download or read book Conceptual Hydrologic Modeling written by Tyler Jon Smith and published by . This book was released on 2012 with total page 470 pages. Available in PDF, EPUB and Kindle. Book excerpt: Water is a fundamental resource, essential for human activities and underpinning economic and environmental sustainability. As such, management of water resources is a critical task, even more so in this time of climate uncertainty and change. Though hydrologic models have long been used to address water resource management, there is a growing desire to develop more reliable, transferable, and physically meaningful hydrologic models in light of data scarcity and uncertainty. In this dissertation, the three primary topics of (1) statistical implementation of models under uncertainty, (2) hydrologic model development, and (3) model applicability/transferability under data scarcity are considered. As a result of this research, we have: (1) developed methods for improved statistical implementation of hydrologic models through the development of a formal likelihood function for ephemeral catchments, the creation of a framework for identifying adequate likelihood functions across catchment conditions, and the introduction of a time domain transformation that was not previously used in hydrologic modeling; (2) developed a new model of catchment hydrologic connectivity based on extensive empirical observations that was shown to be consistent with both external and internal hydrologic variables, as well as transferable; and (3) introduced a new hierarchical Bayesian approach that was shown to accurately quantify uncertainty at an ungauged catchment based on pooled information from similar gauged catchments. This dissertation is divided into six key chapters/manuscripts that each address various aspects involved in improving hydrologic model performance, whose cumulative contribution results in a better understanding of how to construct, implement, and apply hydrologic models to lead to improved water resource management and planning problems of societal importance.

Download or read book Parameterization of Hydrological Model in Ungauged Catchments written by Shailesh Kumar Singh and published by LAP Lambert Academic Publishing. This book was released on 2010-07 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: A prediction in ungauged basins is one of the challenging tasks for a hydrologist of this century. Even though the physically based hydrological models can be the more appropriate in ungauged basins but data requirement limit the use. Conceptual hydrological models are simple and easy to use. These models are needed to be calibrated to obtain the parameters of the model. Availability of data at all location in the basin limits the calibration of conceptual hydrological models. In this book a calibration methodology is presented for discharge series limited condition using upstream and downstream data.

Download or read book Flood Routing in Ungauged Catchments Using Muskingum Methods written by Mesfin H. Tewolde and published by Universal-Publishers. This book was released on 2008-03-27 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt: River stage or flow rates are required for the design and evaluation of hydraulic structures. Most river reaches are ungauged and a methodology is needed to estimate the stages, or rates of flow, at specific locations in streams where no measurements are available. Flood routing techniques are utilised to estimate the stages, or rates of flow, in order to predict flood wave propagation along river reaches. Models can be developed for gauged catchments and their parameters related to physical characteristics such as slope, reach width, reach length so that the approach can be applied to ungauged catchments in the region. The objective of this study is to assess Muskingum-based methods for flow routing in ungauged river reaches, both with and without lateral inflows. Using observed data, the model parameters were calibrated to assess performance of the Muskingum flood routing procedures and the Muskingum-Cunge method was then assessed using catchment derived parameters for use in ungauged river reaches. The Muskingum parameters were derived from empirically estimated variables and variables estimated from assumed river cross-sections within the selected river reaches used. Three sub-catchments in the Thukela catchment in KwaZulu-Natal, South Africa were selected for analyses, with river lengths of 4, 21 and 54 km. The slopes of the river reaches and reach lengths were derived from a digital elevation model. Manning roughness coefficients were estimated from field observations. Flow variables such as velocity, hydraulic radius, wetted perimeters, flow depth and top flow width were determined from empirical equations and cross-sections of the selected rivers. Lateral inflows to long river reaches were estimated from the Saint-Venant equation. Observed events were extracted for each sub-catchment to assess the Muskingum-Cunge parameter estimation method and Three-parameter Muskingum method. The extracted events were further analysed using empirically estimated flow variables. The performances of the methods were evaluated by comparing both graphically and statistically the simulated and observed hydrographs. Sensitivity analyses were undertaken using three selected events and a 50% variation in selected input variables was used to identify sensitive variables. The performance of the calibrated Muskingum-Cunge flood routing method using observed hydrographs displayed acceptable results. Therefore, the Muskingum-Cunge flood routing method was applied in ungauged catchments, with variables estimated empirically. The results obtained shows that the computed outflow hydrographs generated using the Muskingum-Cunge method, with the empirically estimated variables and variables estimated from cross-sections of the selected rivers resulted in reasonably accurate computed outflow hydrographs with respect to peak discharge, timing of peak flow and volume. From this study, it is concluded that the Muskingum-Cunge method can be applied to route floods in ungauged catchments in the Thukela catchment and it is postulated that the method can be used to route floods in other ungauged rivers in South Africa.

Download or read book Evaluating Model Behavior for Hydrologic Forecasting in Gauged and Ungauged Watersheds written by Kathryn Lynn Van Werkhoven and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: