نتایج جستجو برای: hydrologic behaviour

تعداد نتایج: 185668  

2014
HUMBERTO VERGARA YANG HONG JONATHAN J. GOURLEY EMMANOUIL N. ANAGNOSTOU VIVIANA MAGGIONI DIMITRIOS STAMPOULIS

Uncertainty due to resolution of current satellite-based rainfall products is believed to be an important source of error in applications of hydrologic modeling and forecasting systems. A method to account for the input’s resolution and to accurately evaluate the hydrologic utility of satellite rainfall estimates is devised and analyzed herein. A radar-based Multisensor Precipitation Estimator ...

2012
R. T. Hanson L. E. Flint A. L. Flint M. D. Dettinger C. C. Faunt Dan Cayan Wolfgang Schmid

[1] Potential climate change effects on aspects of conjunctive management of water resources can be evaluated by linking climate models with fully integrated groundwater– surface water models. The objective of this study is to develop a modeling system that links global climate models with regional hydrologic models, using the California Central Valley as a case study. The new method is a suppl...

2006
S. Vicuna M. W. Hanemann L. L. Dale J. A. Dracup

Climate change is likely to affect the generation of energy from California’s high-elevation hydropower systems. To investigate these impacts, this study formulates a linear programming model of an 11-reservoir hydroelectric system operated by the Sacramento Municipal Utility District in the Upper American River basin. Four sets of hydrologic scenarios are developed using the Variable Infiltrat...

2007
Arthur Boller Jennifer Moslemi

Human use of freshwater resources has altered the dynamics of hydrologic regimes in rivers around the world. Frequency, timing, and periodicity of extreme fluctuations in water flow have been modified, disrupting the flow regimes to which lotic biota have adapted over evolutionary time. The goal of the proposed research is to increase our understanding of how the hydrologic regime modulates lin...

دل افروز, هادی, فاضلی فرد, محمدحسن, قاهری, عباس, قربانی, محمدعلی,

One of the challenges for hydrologists is finding a new method for hydrologic classification of catchments. An appropriate classification method can be effective in many branches of hydrologic science like modeling. To deal with the complexity and nonlinearity of hydrologic processes, some researchers have proposed using the chaos theory for catchment classification. In this research, possibili...

1998
Knut Alfredsen Bjørn Sæther

This paper presents an object-oriented toolkit for building computer models for water resource planning. The focus is on building a program for flood calculations in river systems with several reservoirs and water transfer structures. The foundation for the flood model is a framework for building hydrologic models. The general framework provides the user with tools for describing the structural...

Journal: :International Journal Of Engineering & Applied Sciences 2017

With regard to the importance of instantaneous peak discharge estimation for watershed management study, and due to the lack of and unqualified climatic and hydrologic data for estimation and measurement in countries such as Iran, researchers were obliged to establish a link between constant parameters (geomorphologic) and variables (hydrologic) to present models with minimum dependence on clim...

Journal: :تحقیقات جغرافیایی 0
داریوش رحیمی حسنعلی غیور حسنعلی غیور حسنعلی غیور

hydrologists have always tried to classify atmospheric and hydrologic events in order to simplify the hydrologic convolutions and the observations or to save the time and the budget. most of these methods are used for the regionalization of hydrologic phenomena like rainfall,streamflow and other components of water cycle.multivariate techniques have been underlined as suitableand powerful tools...

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