نتایج جستجو برای: hydrologists

تعداد نتایج: 296  

Journal: :آب و خاک 0
بهار صلواتی سید حمیدرضا صادقی عبدالرسول تلوری

abstract flood is among phenomena which result considerable damages to resources and is a serious issue among hydrologists. the proper estimation of runoff is necessary for designating appropriate approaches for its control or optimal management. various problems have been reported in application of empirical models. the regional analysis of runoff with different return periods by applying wate...

Journal: :اکو هیدرولوژی 0
محمدحسین جهانگیر استادیار گروه انرژی های نو و محیط ‍ زیست، دانشکدة علوم و فنون نوین، دانشگاه تهران سعیده صادقی دانشجوی کارشناسی ارشد مهندسی طبیعت، دانشکدة علوم و فنون نوین، دانشگاه تهران حدیث سلیمانی دانشجوی کارشناسی ارشد مهندسی طبیعت، دانشکدة علوم و فنون نوین، دانشگاه تهران

flood is one of the major hydroecological phenomena that in each period causes damages to human achievements. therefore, controlling this phenomenon is the subject of many researchers' works and studies specially hydrologists who have tried to predict the flood`s possible behavior by modeling it. this paper is trying to help one of the most widely used methods to estimate the maximum disch...

B. Ghahreman,

A knowledge of rainfall distribution over a finite area is needed for small bydraulic structures design. Hydrologists have always been concerned about Depth- Area- Duration (DAD) for a specific storm in a watershed. An intense storm occurred on June 6, 1992 which claimed some lives in parts of Mashhad, Khorasan Province, Iran. Data of rainfall depth at 29 raingauge stations around the city and ...

ژورنال: علوم آب و خاک 2008
خواجه‌الدین, سید جمال‌الدین, براتی, سوسن , رایگانی, بهزاد , سلطانی کوپایی, سعید ,

‏Snow is a huge water resource in most parts of the world. Snow water equivalent supplies 1/3 of the water requirement for farming and irrigation throughout the world. Water content estimation of a snow-cover or estimation of snowmelt runoff is necessary for Hydrologists. Several snowmelt-forecasting models have been suggested, most of which require continuous monitoring of snow-cover. Today mo...

B. Ghahreman,

A knowledge of rainfall distribution over a finite area is needed for small bydraulic structures design. Hydrologists have always been concerned about Depth- Area- Duration (DAD) for a specific storm in a watershed. An intense storm occurred on June 6, 1992 which claimed some lives in parts of Mashhad, Khorasan Province, Iran. Data of rainfall depth at 29 raingauge stations around the city and ...

The lack of complete coverage of hydrological data forces hydrologists to use the homogenization methods in regional analysis. In this research, in order to choose the best Hierarchical clustering method for regional analysis, base flow and related index were extracted from daily stream flow data using two parameter recursive digital filters in 43 hydrometric stations of the Kerman province. Ph...

موسوی, سیدفرهاد, مهدوی, محمد, نکویی مهر, محمد ,

As unit hydrograph is an important item in flood estimation of the rivers and since flood hydrograph and simultaneous rainfall hyetograph is needed to derive a unit hydrograph, hydrologists recommend synthetic unit hydrographs for areas lacking these hydrometeorological data. A research was conducted in the Zayandehrud-dam watershed (Pelasjan sub-basin) to test the efficiency of synthetic unit ...

Journal: :Water Resources Research 2022

Dominant processes in a watershed are those that most strongly control hydrologic function and response. Estimating dominant enables hydrologists to design physically realistic streamflow generation models, management interventions, understand how climate landscape features function. A recent approach estimating is through their link signatures, which metrics characterize the timeseries. Previo...

2006
PAUL A. CONRADS

Hydrologists and ecologists have been working in the Everglades on integrating a long-term hydrologic data network and a short-term ecological database to support ecological models of the habitat of the snail kite, a threatened and endangered bird. Data mining techniques, including artificial neural network (ANN) models, were applied to simulate the hydrology of snail kite habitat in the Water ...

2012
Alexander Y. Sun Ronald Green Sean Swenson Matthew Rodell

0022-1694/$ see front matter 2011 Published by doi:10.1016/j.jhydrol.2011.10.025 ⇑ Corresponding author. Present address: Bureau o School of Geosciences, University of Texas at Austi Tel.: +1 512 475 6190. E-mail address: [email protected] (A.Y. Sun). Regional groundwater models are increasingly used for shortand long-termwater resources planning, in anticipation of greater climate variability and ...

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