Download or read book Parameter Optimization of a Small Watershed Model written by Douglas Michael Hahn and published by . This book was released on 1977 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Parameter Optimization in a Hydrologic Watershed Model written by Agustin E. Maristany and published by . This book was released on 1983 with total page 137 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mathematical Models of Small Watershed Hydrology and Applications written by Vijay P. Singh and published by Water Resources Publication. This book was released on 2002 with total page 984 pages. Available in PDF, EPUB and Kindle. Book excerpt: Comprehensive account of some of the most popular models of small watershed hydrology and application ~~ of interest to all hydrologic modelers and model users and a welcome and timely edition to any modeling library
Download or read book Modeling Parameter Optimization And Ecohydrologic Assessment Of Watershed Systems written by Xuan Yu and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Integrated watershed models describe the land-phase of hydrologic cycles by coupling processes such as canopy interception, infiltration, recharge, evapotranspiration, overland flow, vadose zone flow, groundwater flow, and channel routing. This modeling scheme serves as an important strategy for understanding the moisture redistribution processes across the watershed and river-basin landscape. For example, the Penn State Integrated Hydrologic Model (PIHM) has successfully been applied to explain the impacts of antecedent soil moisture on peak streamflow and timing. However, due to the heavy computational cost of solving integrated models with complex model structure, efficient parameter estimation for PIHM is a major computational and algorithmic challenge. The focus of this dissertation has four main themes: (1) develop an efficient calibration strategy for PIHM; (2) develop a weighted-objective calibration scheme for multi-variable distributed parameters (e.g., streamflow, water table depth, and eddy flux data); (3) test the parameter-estimation process for spatial shallow groundwater calibration of PIHM using national wetland geospatial data (National Wetland Inventory: NWI); (4) extend the capabilities of PIHM for linking vegetation dynamics from an ecosystem model and evaluating the importance of vegetation growth in water balance studies.The temporal and geospatial complexity of the data requirements for integrated and fully coupled catchment models increases the difficulty of applying parameter optimization in real watershed applications. In this research, a new strategy known as partition calibration was proposed to enable the automatic calibration of PIHM. The concept can be thought of as a "divide-and-conquer algorithm," where the parameter space is divided into two or more sub-problems that can be solved sequentially. The first partition of the parameter vector is divided according to the two dominant time-scales of catchment hydrological processes: 1) event-scale hydrologic response parameters; and 2) seasonal-scale response parameters. Once divided, the event-scale group parameters and seasonal-scale group parameters are then calibrated sequentially. The second partition focused on the separation of the total calibration objective onto multiple targets to predict each observed hydrological variable. The "informativeness" of each calibration target was defined in terms of a weighted objective function. Application of the scheme suggested the use of an informativeness-based partitioning of streamflow, groundwater, and ET parameters and demonstrated that partition calibration was superior to both single-objective calibration and un-weighted average multi-objective calibration.Applications of the PIHM were found to be efficient with the partition calibration strategy. The first PIHM application involves characterization of the freshwater wetland response to climate change at seven catchments within the Susquehanna River Basin. In this case, streamflow time series and geospatial mapping of wetlands in the National Wetland Inventory (NWI) were used to calibrate the model to capture the distributed groundwater and streamflow dynamics. After calibration, the model was applied to an IPCC climate change scenario (2046-2065), and the modeling results suggested that upland groundwater levels were more sensitive to climate change than water levels of wetlands in lower parts of the catchment, as expected. In the final part of this research, long-term modeling of PIHM compared the role of fixed seasonal variation in LAI (Leaf Area Index) and a fully dynamic vegetation growth model. The community ecosystem model BIOME-BGC was linked to PIHM to test the hypothesis that default monthly LAI values are sufficient to represent long-term water balances in a catchment. By comparing model results for fixed LAI and dynamic LAI, it was demonstrated that fixed LAI is not sufficient for capturing interannual variability of forest vegetation and water flow dynamics, especially as it relates to the onset and growth of forest.
Download or read book Hydrologic Modeling of Small Watersheds written by Charles Thomas Haan and published by . This book was released on 1982 with total page 552 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Parameter Optimization for Stimulating Semi arid Watershed Hydrology written by Arthur P. O'Hayre and published by . This book was released on 1972 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Calibration of Watershed Models written by Qingyun Duan and published by John Wiley & Sons. This book was released on 2003-01-10 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt: Published by the American Geophysical Union as part of the Water Science and Application Series, Volume 6. During the past four decades, computer-based mathematical models of watershed hydrology have been widely used for a variety of applications including hydrologic forecasting, hydrologic design, and water resources management. These models are based on general mathematical descriptions of the watershed processes that transform natural forcing (e.g., rainfall over the landscape) into response (e.g., runoff in the rivers). The user of a watershed hydrology model must specify the model parameters before the model is able to properly simulate the watershed behavior.
Download or read book Computer Models of Watershed Hydrology written by Vijay P. Singh and published by . This book was released on 1995 with total page 1150 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mathematical Models of Large Watershed Hydrology written by Vijay P. Singh and published by Water Resources Publication. This book was released on 2002 with total page 930 pages. Available in PDF, EPUB and Kindle. Book excerpt: Comprehensive account of some of the most popular models of large watershed hydrology ~~ of interest to all hydrologic modelers and model users and a welcome and timely edition to any modeling library
Download or read book Masters Theses in the Pure and Applied Sciences written by W. H. Shafer and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 319 pages. Available in PDF, EPUB and Kindle. Book excerpt: Masters Theses in the Pure and Applied Sciences was first conceived, published, and dis seminated by the Center for Information and Numerical Data Analysis and Synthesis (CINDAS) * at Purdue University in 1957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dissemination phases of the ac tivity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all concerned if the printing and distribution of the volume were handled by an international publishing house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Corporation of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 22 (thesis year 1977) a total of 10,658 theses titles from 28 Canadian and 227 United States universities. We are sure that this broader base for theses titles reported will greatly enhance the value of this important annual reference work. While Volume 22 reports theses submitted in 1977, on occasion, certain universities do report theses submitted in previous years but not reported at the time.
Download or read book Parameter Optimization of Conceptual Hydrological Models written by Charles William Owen Eeles and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Optimal Parameter Estimation and Investigation of Objective Functions of Urban Runoff Models written by Ji Han and published by . This book was released on 1980 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Multivariate Analysis of the Stanfod Model Parameters as Applied to Small Watersheds written by Sant Sharan Garg and published by . This book was released on 1972 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Parameter Estimation and Uncertainty Quantification in Water Resources Modeling written by Philippe Renard and published by Frontiers Media SA. This book was released on 2020-04-22 with total page 177 pages. Available in PDF, EPUB and Kindle. Book excerpt: Numerical models of flow and transport processes are heavily employed in the fields of surface, soil, and groundwater hydrology. They are used to interpret field observations, analyze complex and coupled processes, or to support decision making related to large societal issues such as the water-energy nexus or sustainable water management and food production. Parameter estimation and uncertainty quantification are two key features of modern science-based predictions. When applied to water resources, these tasks must cope with many degrees of freedom and large datasets. Both are challenging and require novel theoretical and computational approaches to handle complex models with large number of unknown parameters.
Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1988 with total page 1064 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Unsaturated zone Modeling written by R.A. Feddes and published by Springer Science & Business Media. This book was released on 2004-10-11 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mankind has manipulated the quantity and quality of soil water for millennia. Food production was massively increased through fertilization, irrigation and drainage. But malpractice also caused degradation of immense areas of once fertile land, rendering it totally unproductive for many generations. In populated areas, the pollutant load ever more often exceeds the soil’s capacity for buffering and retention, and large volumes of potable groundwater have been polluted or are threatened to be polluted in the foreseeable future. In the past decades, the role of soil water in climate patterns has been recognized but not yet fully understood. The soil-science community responded to this diversity of issues by developing numerical models to simulate the behavior of water and solutes in soils. These models helped improve our understanding of unsaturated-zone processes and develop sustainable land-management practices. Aimed at professional soil scientists, soil-water modelers, irrigation engineers etc., this book discusses our progress in soil-water modeling. Top scientists present case studies, overviews and analyses of strengths, weaknesses, opportunities and threats related to soil-water modeling. The contributions cover a wide range of spatial scales, and discuss fundamental aspects of unsaturated-zone modeling as well as issues related to the application of models to real-world problems.
Download or read book Modeling Automated Parameter Calibration and Sensitivity Analysis of a Watershed Model of the Shaw Road Basin written by Alexandre Daniel Remnek and published by . This book was released on 2003 with total page 590 pages. Available in PDF, EPUB and Kindle. Book excerpt:
