نتایج جستجو برای: daily and monthly scales

تعداد نتایج: 16847680  

2012
Jinliang Huang Pei Zhou Zengrong Zhou Yaling Huang

Land use and land cover (LULC) information is an important component influencing watershed modeling with regards to hydrology and water quality in the river basin. In this study, the sensitivity of the Soil and Water Assessment Tool (SWAT) model to LULC datasets with three points in time and three levels of detail was assessed in a coastal subtropical watershed located in Southeast China. The r...

Journal: :Earth System Science Data 2021

Abstract. The main drawback of the reconstruction high-resolution distributed global radiation (Rg) time series in mountainous semiarid environments is common lack station-based solar registers. This work presents 19 years (2000–2018) high-spatial-resolution (30 m) daily, monthly, and annual maps derived using GIS-based model proposed by Aguilar et al. (2010) a area southern Europe: Sierra Neva...

Journal: :Remote Sensing 2015
Xiaoduo Pan Xin Li Guodong Cheng Hongyi Li Xiaobo He

To obtain long term accurate high resolution precipitation for the Heihe River Basin (HRB), Weather Research and Forecasting (WRF) model simulations were performed using two different initial boundary conditions, with nine microphysical processes for different analysis parameterization schemes. High spatial-temporal precipitation was simulated from 2000 to 2013 and a suitable set of initial, bo...

Journal: :مدیریت آب و آبیاری 0
بهنام آبابایی دکتری مهندسی آبیاری و زهکشی گروه مهندسی آبیاری و آبادانی، دانشکدة مهندسی و فناوری کشاورزی، پردیس کشاورزی و منابع طبیعی کرج، دانشگاه تهران، کرج - ایران. فرهاد میرزایی اصلی به ترتیب، استادیار و استاد گروه مهندسی آبیاری و آبادانی، دانشکدة مهندسی و فناوری کشاورزی، پردیس کشاورزی و منابع طبیعی کرج، دانشگاه تهران، کرج - ایران. تیمور سهرابی به ترتیب، استادیار و استاد گروه مهندسی آبیاری و آبادانی، دانشکدة مهندسی و فناوری کشاورزی، پردیس کشاورزی و منابع طبیعی کرج، دانشگاه تهران، کرج - ایران.

in this research, data fusion (df) method was applied to simulate the hydrological process of taleghan reservoir daily inflow. two different df algorithms were proposed and assessed based on k-nearest neighbors (knn) algorithm. four artificial neural network models and two hammerstein-wiener (hw) models were used as the individual simulation models. comparison of the results between individual ...

2016
Kasra Mohammadi Shahaboddin Shamshirband Mohammad Hossein Anisi Khubaib Amjad Alam Dalibor Petković Aleksandra Medvedeva

In this paper, the support vector regression (SVR) methodology was adopted to estimate the horizontal global solar radiation (HGSR) based upon sunshine hours (n) and maximum possible sunshine hours (N) as input parameters. The capability of two SVRs of radial basis function (rbf) and polynomial basis function (poly) was investigated and compared with the conventional sunshine duration-based emp...

2010
J. P. Evans M. F. McCabe

[1] The climate of the Murray‐Darling basin (MDB) has been simulated using the Weather Research and Forecasting (WRF) model. WRF was implemented using a 10 km horizontal grid and run for 24 years from 1985 through 2008. The model simulated climate was evaluated against gridded precipitation and temperature observations from the Australian Water Availability Project (AWAP) at daily, monthly, int...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علامه طباطبایی - دانشکده ادبیات و زبانهای خارجی 1390

monumental changes occurring on a daily basis have altered the world into a global village of expanding technology and shrinking geography in which preparing language learners for intercultural communication seems to be a sine qua non for modern language education. employing a cross-sectional design in its first phase, this study investigated the intercultural sensitivity and language proficien...

پایان نامه :وزارت بهداشت، درمان و آموزش پزشکی - دانشگاه علوم پزشکی و خدمات بهداشتی درمانی مشهد - دانشکده دندانپزشکی 1390

objective: the objective of this study was to investigate the invitro fluoride release of four new self-adhesive resin cements; set (sdi, australia), breeze (pentron, usa), embrace wetbond (pulpdent, usa), g-cem (gc, japan) and to assess the bonding performance of these self-adhesive resin cements for bonding of orthodontic brackets. materials and methods: for fluoride release experiment, six ...

ژورنال: علوم آب و خاک 2010
اخوان, سمیرا , اسلامیان , سید سعید , افیونی, مجید , عابدی کوپایی, جهانگیر , عباسپور, کریم , موسوی, سید فرهاد ,

Temporal and spatial distribution of water components in watersheds, estimation of water quality, and uncertaintiesassociated with these estimations are important issues in freshwater studies. In this study, Soil and Water AssessmentTool (SWAT) model was used to estimate components of freshwater availability: blue water (surface runoff plus deepaquifer recharge), green water flow (actual evapot...

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