نتایج جستجو برای: base flow

تعداد نتایج: 730080  

Journal: :desert 0
h. rouhani assistant professor, university of gonbad_e_ kavous, gonbad-e-kavous, iran a. malekian assistant professor, university of tehran, karaj, iran

understanding of the runoff generation processes is important in understanding the magnitude and dynamics ofgroundwater discharge. however, these processes continue to be difficult to quantify and conceptualize. in this study,two digital filter based separation modules, the recursive filtering method (rdf) and a generalization of therecursive digital filter (grdf) were1991–2002 in the hableh ro...

Journal: :تحقیقات جغرافیایی 0
مهدی تیموری دانشگاه فردوسی مشهد

hydrograph analysis is a complex problem in a variety of water resources investigations and its estimate is critical in the assessment of low flow characteristics of river for use in water supply, water management and pollution assessment. the paper describes different methods of base flow separation based recession analysis from daily river flow records and distinguishes the most suitable meth...

Journal: :desert 2013
h. rouhani a. malekian

understanding of the runoff generation processes is important in understanding the magnitude and dynamics ofgroundwater discharge. however, these processes continue to be difficult to quantify and conceptualize. in this study,two digital filter based separation modules, the recursive filtering method (rdf) and a generalization of therecursive digital filter (grdf) were1991–2002 in the hableh ro...

Journal: :اکو هیدرولوژی 0
رفعت زارع بیدکی استادیار، دانشکدۀ منابع طبیعی و علوم زمین، دانشگاه شهرکرد، شهرکرد مریم مهدیانفرد کارشناس ارشد آبخیزداری، دانشکدۀ منابع طبیعی و علوم زمین، دانشگاه شهرکرد، شهرکرد افشین هنربخش دانشیار، دانشکدۀ منابع طبیعی و علوم زمین، دانشگاه شهرکرد، شهرکرد حسین زینی وند استادیار، دانشکدۀ منابع طبیعی، دانشگاه لرستان، خرم‏آباد

commonly used environmental flow evaluation techniques range in complexity. some requires stream flow records alone, and some accounts for the habitat requirements of individual species life-stages and physical characteristics of the stream. hydrological based methods for environmental flow assessment are the first step in planning for environmental allocation in developing countries. for deter...

دهقانی, امیراحمد, رحیمی, لیلا, قربانی, خلیل,

     Knowledge of river discharge and water-quality trend can be useful for planning and management of water resources. Due to the fact that the river base flow is supplied by ground water, considering of base flow for managing environmental demand. The Mann-Kendall's test is one of the approaches which is used for investigating of the trend in time series. In this study, the Mann-Kendall's tes...

ژورنال: مواد پرانرژی 2018

In this work, the rheological parameters such as yield stress, viscosity coefficient and power law index were obtained for a double-base propellants and modified double-base propellants formulations using the Squeeze flow rheometric method. Squeeze Flow test was used to investigate the rheological behavior without wall slip condition, and to determine the temperature dependency of fluidity in d...

تیموری, مهدی , غلامی, شعبانعلی , قنبرپور, محمدرضا ,

Estimating the volume of groundwater contribution to runoff within a watershed is one of the most important subjects in water resources management and hydrology. In this paper, groundwater contribution to total runoff as a base flow index was estimated using hydrograph separation in six stream gauging stations in southwest of Iran. The major objective of this research is to distinguish the most...

ژورنال: علوم آب و خاک 2008
تیموری, مهدی , غلامی, شعبانعلی , قنبرپور, محمدرضا ,

Estimating the volume of groundwater contribution to runoff within a watershed is one of the most important subjects in water resources management and hydrology. In this paper, groundwater contribution to total runoff as a base flow index was estimated using hydrograph separation in six stream gauging stations in southwest of Iran. The major objective of this research is to distinguish the most...

Journal: :Journal of Hydrologic Engineering 2004

Base-flow can be considered as a part of stream-flow which is connected to discharged flow from aquifers. Due to high variations in rainfall values and other hydrological components in arid and semi-arid areas, watershed scale simulation of the flow is very important. Hydrological models are generally employed as an appropriate tool in this field of study. This work makes uses of use a distribu...

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