Download or read book Evaluation of State of the art Precipitation Estimates written by Shekhar Raj Mote and published by . This book was released on 2018 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: Availability of precipitation data is very important in every aspect related to hydrology. Readings from the ground stations are reliable and are used in hydrological models to do various analysis. However, the predictions are always associated with uncertainties due to the limited number of ground stations, which requires interpolation of the data. Meanwhile, groundbreaking approach in capturing precipitation events from vantage point through satellites in space has created a platform to not only merge ground data with satellite estimates to produce more accurate result, but also to find the data where ground stations are not available or scarcely available. Nevertheless, the data obtained through these satellite missions needs to be verified on its temporal and spatial resolution as well as the uncertainties associated before we make any decisions on its basis. This study focuses on finding and evaluating data obtained from two multi-satellite precipitation measurements missions: i) Tropical Rainfall Measuring Mission (TRMM) Multi-satellite Precipitation Analysis (TMPA) ii) Global Precipitation Measurement (GPM) mission. GPM is the latest mission launched on Feb 28, 2014 after the successful completion of TRMM mission which collected valuable data for 17 years since its launch in November 1997. Both near real time and final version precipitation products for TMPA and GPM are considered for this study. Two study areas representing eastern and western parts of the United States of America (USA) are considered: i) Charlotte (CLT) in North Carolina ii) San Francisco (SF) in California. Evaluation is carried out for daily accumulated rainfall estimates and single rainfall events. Statistical analysis and error categorization of daily accumulated rainfall estimates were analyzed in two parts: i) Ten yeas data available for TMPA products were considered for historical analysis ii) Both TMPA and GPM data available for a ten-month common period was considered for GPM Era analysis. To study how well the satellite estimates with their finest temporal and spatial resolution capture single rainfall event and to explore their engineering application potential, an existing model of SF watershed prepared in Infoworks Integrated Catchment Model (ICM) was considered for hydrological simulation. Infoworks ICM is developed and maintained by Wallingford Software in the UK and SF watershed model is owned by San Francisco Public Works (SFPW). The historical analysis of TMPA products suggested overestimation of rainfall in CLT region while underestimation in SF region. This underestimation was largely associated with missed-rainfall events and negative hit events in SF. This inconsistency in estimation was evident in GPM products as well. However, in the study of single rainfall events with higher magnitude of rainfall depth in SF, the total rainfall volume and runoff volume generated in the watershed were over-estimated. Hence, satellite estimates in general tends to miss rainfall events of lower magnitude and over-estimate rainfall events of higher magnitude. From statistical analysis of GPM Era data, it was evident that GPM has been able to correct this inconsistency to some extent where it minimized overestimation in CLT region and minimized negative error due to underestimation in SF. GPM products fairly captured the hydrograph shape of outflow in SF watershed in comparison to TMPA. From this study, it can be concluded that even though GPM precipitation estimates could not quiet completely replace ground rain gage measurements as of now, with the perpetual updating of algorithms to correct its associated error, it holds realistic engineering application potential in the near future.
Download or read book Military Hydrology written by Willard R. McDaniel and published by . This book was released on 1991 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of NEXRAD Precipitation Estimates and Their Potential Use for Nonpoint Source Pollution Modeling written by Christopher Bryan Young and published by . This book was released on 2000 with total page 458 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Radar Hydrology written by Yang Hong and published by CRC Press. This book was released on 2018-09-03 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: Radar Hydrology: Principles, Models, and Applications provides graduate students, operational forecasters, and researchers with a theoretical framework and practical knowledge of radar precipitation estimation. The only text on the market solely devoted to radar hydrology, this comprehensive reference: Begins with a brief introduction to radar Focuses on the processing of radar data to arrive at accurate estimates of rainfall Addresses advanced radar sensing principles and applications Covers radar technologies for observing each component of the hydrologic cycle Examines state-of-the-art hydrologic models and their inputs, parameters, state variables, calibration procedures, and outputs Discusses contemporary approaches in data assimilation Concludes with methods, case studies, and prediction system design Includes downloadable MATLAB® content Flooding is the #1 weather-related natural disaster worldwide. Radar Hydrology: Principles, Models, and Applications aids in understanding the physical systems and detection tools, as well as designing prediction systems.
Download or read book Evaluation of Precipitation Estimates from PRISM for the 1961 90 and 1971 2000 Data Sets Nevada written by Anne E. Jeton and published by . This book was released on 2006 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hydrological Modelling and the Water Cycle written by Soroosh Sorooshian and published by Springer Science & Business Media. This book was released on 2008-07-18 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume is a collection of a selected number of articles based on presentations at the 2005 L’Aquila (Italy) Summer School on the topic of “Hydrologic Modeling and Water Cycle: Coupling of the Atmosphere and Hydrological Models”. The p- mary focus of this volume is on hydrologic modeling and their data requirements, especially precipitation. As the eld of hydrologic modeling is experiencing rapid development and transition to application of distributed models, many challenges including overcoming the requirements of compatible observations of inputs and outputs must be addressed. A number of papers address the recent advances in the State-of-the-art distributed precipitation estimation from satellites. A number of articles address the issues related to the data merging and use of geo-statistical techniques for addressing data limitations at spatial resolutions to capture the h- erogeneity of physical processes. The participants at the School came from diverse backgrounds and the level of - terest and active involvement in the discussions clearly demonstrated the importance the scienti c community places on challenges related to the coupling of atmospheric and hydrologic models. Along with my colleagues Dr. Erika Coppola and Dr. Kuolin Hsu, co-directors of the School, we greatly appreciate the invited lectures and all the participants. The members of the local organizing committee, Drs Barbara Tomassetti; Marco Verdecchia and Guido Visconti were instrumental in the success of the school and their contributions, both scienti cally and organizationally are much appreciated.
Download or read book An Evaluation of the Factors Affecting Wintertime Quantitative Precipitation Forecasts in an Explicit Cloud Model Over Mountainous Terrain written by Michael P. Meyers and published by . This book was released on 1989 with total page 127 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book State of the art written by William W-G. Yeh and published by . This book was released on 1981* with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A State of the art Report on Precipitation Modification written by United States. National Water Commission and published by . This book was released on 1970 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Deep Learning Framework for Precipitation Estimation from Bispectral Satellite Information written by Yumeng Tao and published by . This book was released on 2017 with total page 151 pages. Available in PDF, EPUB and Kindle. Book excerpt: Compared to ground-based precipitation measurements, satellite-based precipitation estimates have the advantage of global coverage and high spatiotemporal resolutions. However, the accuracy of satellite-based precipitation observations is still insufficient to serve many weather, climate, and hydrologic applications. In the development of a satellite-based precipitation product, the two most important aspects are the provision of sufficient precipitation-related information in the selected satellite data and the use of the proper methodologies to extract such information and link it to precipitation estimates.In this dissertation, a state-of-the-art deep learning framework for precipitation estimation using bispectral satellite information, Infrared (IR) and water vapor (WV) channels, is developed. I explore the effectiveness of deep learning techniques in extracting useful features from the satellite information and demonstrate the value of incorporating multiple satellite channels.Specifically, I first provide a bias reduction model for satellite-based precipitation products using deep learning approaches to demonstrate their capability of extracting additional useful information from the satellite data. I then design a two-stage framework for precipitation estimation from bispectral information, consisting of an initial rain/no-rain (R/NR) binary classification, followed by a second stage estimating the non-zero precipitation amount. In the first stage, the model aims to eliminate the large fraction of NR pixels and to precisely delineate precipitation regions. In the second stage, the model aims to estimate the point-wise precipitation amount accurately while preserving its heavy-tailed distribution. Stacked denoising auto-encoders (SDAEs), a commonly used deep learning method, are applied in both stages.The operational product, Precipitation Estimation from Remotely Sensed Information using Artificial Neural Networks Cloud Classification System (PERSIANN-CCS), serves as a baseline model throughout this dissertation. I evaluate performance along a number of common performance measures, including both R/NR and real-valued precipitation accuracy. Case studies focusing on the model's performance for specific events are also included. The experiments show that our proposed two-stage model outperforms original PERSIANN-CCS in different verification periods over the central United States and in large-scale application. Therefore, the two-stage deep learning framework has the potential to serve as a more accurate and more reliable satellite-based precipitation estimation algorithm.
Download or read book The State of the Art of Probabilistic Weather Forecasting written by Allan H. Murphy and published by . This book was released on 1984 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Floods in a Changing Climate written by Ramesh S. V. Teegavarapu and published by . This book was released on 2012 with total page 269 pages. Available in PDF, EPUB and Kindle. Book excerpt: Measurement, analysis and modeling of extreme precipitation events linked to floods is vital in understanding the world's changing climate. This book examines and documents the impacts of climate change and climate variability on extreme precipitation events, providing methods for assessment of the trends in these events, and their impacts. It also provides a basis to develop procedures and guidelines for climate-adaptive hydrologic engineering. Topics covered include approaches for assessment of hydrometerological floods, recent developments in hydrologic design for flood mitigation, and applications and limitations of improved precipitation forecasts, using information about internal modes of climate (teleconnections). State-of-the-art methodologies for precipitation analysis, estimation and interpolation are included, and exercises for each chapter, supported by modelling software and computational tools available online at www.cambridge.org/teegavarapu, enable the reader to apply and engage with the innovative methods of assessment"
Download or read book Probable Maximum Precipitation Estimates United States Between the Continental Divide and the 103rd Meridian written by United States. National Oceanic and Atmospheric Administration and published by . This book was released on 1984 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Rainfall written by Firat Y. Testik and published by John Wiley & Sons. This book was released on 2013-05-02 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt: Published by the American Geophysical Union as part of the Geophysical Monograph Series, Volume 191. Rainfall: State of the Science offers the most up-to-date knowledge on the fundamental and practical aspects of rainfall. Each chapter, self-contained and written by prominent scientists in their respective fields, provides three forms of information: fundamental principles, detailed overview of current knowledge and description of existing methods, and emerging techniques and future research directions. The book discusses Rainfall microphysics: raindrop morphodynamics, interactions, size distribution, and evolution Rainfall measurement and estimation: ground-based direct measurement (disdrometer and rain gauge), weather radar rainfall estimation, polarimetric radar rainfall estimation, and satellite rainfall estimation Statistical analyses: intensity-duration-frequency curves, frequency analysis of extreme events, spatial analyses, simulation and disaggregation, ensemble approach for radar rainfall uncertainty, and uncertainty analysis of satellite rainfall products The book is tailored to be an indispensable reference for researchers, practitioners, and graduate students who study any aspect of rainfall or utilize rainfall information in various science and engineering disciplines.
Download or read book NBS Special Publication written by and published by . This book was released on 1980 with total page 964 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Water resources Investigations Report written by and published by . This book was released on 2000 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Precipitation Advances in Measurement Estimation and Prediction written by Silas C. Michaelides and published by Springer Science & Business Media. This book was released on 2008-02-27 with total page 552 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume is the outcome of contributions from 51 scientists who were invited to expose their latest findings on precipitation research and in particular, on the measurement, estimation and prediction of precipitation. The reader is presented with a blend of theoretical, mathematical and technical treatise of precipitation science but also with authentic applications, ranging from local field experiments and country-scale campaigns to multinational space endeavors.
