Download or read book Evaluating the Effects of Urbanization and Land use Planning Using Ground water and Surface water Models written by R. J. Hunt and published by . This book was released on 2001 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fact Sheet written by and published by . This book was released on 2001 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Watershed Hydrology written by Vijay P. Singh and published by Allied Publishers. This book was released on 2003 with total page 588 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1991 with total page 884 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Status and New Capabilities of Computer Program HEC 6 Scour and Deposition in Rivers and Reservoirs written by Robert C. MacArthur and published by . This book was released on 1990 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: Last year the Hydrologic Engineering Center (HEC) and the Waterways Experiment Station incorporated the results from more than ten years of research and development into a new version of computer program HEC-6: 'Scour and Deposition in Rivers and Reservoirs' (HEC, 1977). Because of the extensive modifications made to HEC-6, an entirely new User's Manual was also prepared. HEC released a Beta Test Version of the program in the fall of 1989, for field testing. Public release of the new version of HEC-6 is scheduled for September 1990. This paper describes the present status of the program as of April 1990, the expanded capabilities, and the improved documentation to be included in the forthcoming release of computer program HEC-6. Keywords: Computer programs; User manuals; Sediment transport modeling; Deposition; One-dimensional mobile boundary model; Rivers; Reservoirs. (CP).
Download or read book Two dimensional Floodplain Modeling written by D. Michael Gee and published by . This book was released on 1990 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: A two-dimensional horizontal finite element numerical model (RMA-2) was applied to a 15 mile (24 km) river channel-floodplain reach in West Germany. Previous applications of such models have been restricted to much smaller scales. The results indicate that finite element schemes may successfully estimate river stage in large scale floodplain applications. Computed stage hydrographs compared well with observed data using loss coefficients within expected ranges. Two-dimensional flow models have been applied to certain classes of river channel problems. Applications have included detailed analyses of flow patterns near structures such as bridges and floodplains. In all these problems the scale of interest has been small, e.g. reaches of river a few river widths long. Many estuary studies have been done that were of large scale; some of these utilized a hybrid (numerical plus physical) modeling technique. In a review of the application of finite element methods to river channels, Samuels reported that the river channel was resolved separately from the floodplain in only two studies. Missing in previous work is attention to large scale floodplain modeling. The work reported in this paper focuses on the feasibility and accuracy of applying a two-dimensional flow model to a large floodplain. Traditional floodplain studies have used semi-empirical flow routing with steady, one-dimensional computation of water surface elevations to define inundated areas. Keywords: Army Corps of Engines. (kr).
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1982 with total page 638 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Download or read book Environmental Protection Research Catalog Indexes written by Smithsonian Science Information Exchange and published by . This book was released on 1972 with total page 1478 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Muskingum Cunge Channel Flow Routing Method for Drainage Networks written by Jürgen Garbrecht and published by . This book was released on 1991 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Prescriptive Reservoir System Analysis Model written by Darryl W. Davis and published by . This book was released on 1991 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Reservoir System Analysis written by and published by . This book was released on 1992 with total page 760 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Impacts of Urbanization and Climate Change on the Hydrological Cycle written by Lele Shu and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The past one hundred years have seen a tremendous migration to towns and cities worldwide. This population movement exerts serious impacts on surface and ground- water supplies, soil health, and the sustainability of ecosystems. At the same time, climate change has become a decisive influence on water systems as land conversion continues. Historically, urbanization and climate change were two important determinants in the sustainability of water, food and energy supplies, as well as the increasing risk of environmental hazards.At the watershed scale the evolving land use change in urban areas does not only change the flood risk because of increasing impervious areas or by directly reducing the consumption of water by trees and plants, but also fundamentally alters the local water balance and the partitioning of water within the land-atmosphere- ecological system. Both land use change and climate change may influence the urban watershed in ways that reinforce or compensate sustainable management.In this study we applied two spatially explicit models to the problem. One is the Penn State Integrated Hydrologic Model (PIHM), a hydrologic model that partitions the water balance in space and time over the urban catchment. The other is the Cellular Automata Land Use Change Model (CALUC), a land use change model, which simulates the evolution of land use classes based on physical measures associated with population change and land use demand factors.We selected two study sites, one modern and one ancient, to highlight the capability of coupling catchment hydrology with land use change models. The goal is to assess the role of hydrologic change in urbanizing watersheds and to evaluate the contemporaneous impacts of climate change. The modern sites are the Conestoga watershed and the Lancaster PA urban center; the historical site is the ancient Maya city of Tikal in Peten region of Guatemala. In each setting, the essential data was developed and the models were used to evaluate how urbanization and land use change gradually altered the entire water balance often in unexpected ways.Chapter 1 introduces the overall problem and carries out a comprehensive literature review for each of the following chapters. Chapter 2 discusses the relevant models used in the study, and the role of model parameterization, particularly the important role that macropores have on maintaining a healthy soil and supporting soil moisture and recharge to groundwater. Chapter 2 also describes the Cellular Automata Land Use Change model, which is adopted here to simulate land use conditions. Chapter 3 then evaluates the past, present and future land use conditions in the Conestoga watershed and develops quantitative metrics of evaluation. Chapter 4 extends the Conestoga case study to evaluate hydrologic performance when dynamic land use and future climate change scenarios from IPCC are the drivers. An evaluation of the relative importance of land use and climate to hydrologic change is presented. Chapter 5 implements the models in a retrospective scenario of the water history of the ancient Maya city of Tikal and discusses the problem of urbanization-deforestation-agriculture land conversion, and the likely sensitivity of their water supply to extreme climate events. Chapter 6 summarizes the two case studies and makes inferences on the resilience and elasticity of the two study sites to climate and land use change.
Download or read book HEC River Analysis System HEC RAS written by Gary W. Brunner and published by . This book was released on 1994 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book HEC 6 written by and published by . This book was released on 1995 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Predicting Deposition Patterns in Small Basins written by D. Michael Gee and published by . This book was released on 1991 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hydrologic Aspects of Flood Warning preparednness Programs written by Harry W. Dotson and published by . This book was released on 1990 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Review of GIS Applications in Hydrologic Modeling written by Bruce A. DeVantier and published by . This book was released on 1993 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
