Author: Jamie C. DouglasPublisher:
ISBN:
Category :
Languages : en
Pages : 166
Book Description
Use of Inverse Parameter Estimation Software to Calibrate and Validate a Field Scale Model of Winter and Spring Infiltration
Author: Jamie C. DouglasParameter Estimation and Inverse Problems
Author: Richard C. AsterPublisher:
ISBN:
Category : Inverse problems (Differential equations)
Languages : en
Pages : 0
Book Description
Parameter Estimation at Regional Scale Through Solution of the Inverse Problem
Author: Ahmeda M. SalemApproaches to Highly Parameterized Inversion
Author: John DohertyPublisher: CreateSpace
ISBN: 9781500505349
Category :
Languages : en
Pages : 40
Book Description
Pilot points have been used in geophysics and hydrogeology for at least 30 years as a means to bridge the gap between estimating a parameter value in every cell of a model and subdividing models into a small number of homogeneous zones. Pilot points serve as surrogate parameters at which values are estimated in the inverse-modeling process, and their values are interpolated onto the modeling domain in such a way that heterogeneity can be represented at a much lower computational cost than trying to estimate parameters in every cell of a model. Although the use of pilot points is increasingly common, there are few works documenting the mathematical implications of their use and even fewer sources of guidelines for their implementation in hydrogeologic modeling studies. This report describes the mathematics of pilot-point use, provides guidelines for their use in the parameter-estimation software suite (PEST), and outlines several research directions. Two key attributes for pilot-point definitions are highlighted. First, the difference between the information contained in the every-cell parameter field and the surrogate parameter field created using pilot points should be in the realm of parameters which are not informed by the observed data (the null space). Second, the interpolation scheme for projecting pilot-point values onto model cells ideally should be orthogonal. These attributes are informed by the mathematics and have important ramifications for both the guidelines and suggestions for future research.
Root Zone Water Quality Model
Author: Lajpat AhujaPublisher: Water Resources Publication
ISBN: 9781887201087
Category : Technology & Engineering
Languages : en
Pages : 388
Book Description
This publication comes with computer software and presents a comprehensive simulation model designed to predict the hydrologic response, including potential for surface and groundwater contamination, of alternative crop-management systems. It simulates crop development and the movement of water, nutrients and pesticides over and through the root zone for a representative unit area of an agricultural field over multiple years. The model allows simulation of a wide spectrum of management practices and scenarios with special features such as the rapid transport of surface-applied chemicals through macropores to deeper depths and the preferential transport of chemicals within the soil matrix via mobile-immobile zones. The transfer of surface-applied chemicals (pesticides in particular) to runoff water is also an important component.
Runoff Prediction in Ungauged Basins
Author: Günter BlöschlPublisher: Cambridge University Press
ISBN: 1107067553
Category : Science
Languages : en
Pages : 491
Book Description
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.
Pilot Analysis of Global Ecosystems
Author: Carmen RevengaPublisher:
ISBN:
Category : Science
Languages : en
Pages : 104
Book Description
Also available via the Internet from the World Resources Institute web site.
Guidelines for Determining Flood Flow Frequency
Author: Urban Stormwater Management in the United States
Author: National Research CouncilPublisher: National Academies Press
ISBN: 0309125391
Category : Nature
Languages : en
Pages : 611
Book Description
The rapid conversion of land to urban and suburban areas has profoundly altered how water flows during and following storm events, putting higher volumes of water and more pollutants into the nation's rivers, lakes, and estuaries. These changes have degraded water quality and habitat in virtually every urban stream system. The Clean Water Act regulatory framework for addressing sewage and industrial wastes is not well suited to the more difficult problem of stormwater discharges. This book calls for an entirely new permitting structure that would put authority and accountability for stormwater discharges at the municipal level. A number of additional actions, such as conserving natural areas, reducing hard surface cover (e.g., roads and parking lots), and retrofitting urban areas with features that hold and treat stormwater, are recommended.
Advances in Crop Modelling for a Sustainable Agriculture
Author: Kenneth BootePublisher: Burleigh Dodds Series in Agric
ISBN: 9781786762405
Category : Technology & Engineering
Languages : en
Pages : 420
Book Description
Crop modelling has huge potential to improve decision making in farming. This collection reviews advances in next-generation models focused on user needs at the whole farm system and landscape scale.