نتایج جستجو برای: annual average of precipitation

تعداد نتایج: 21179088  

2015
Gopal Chandra Saha

Climate change would significantly affect the temporal pattern and amount of annual precipitation at the regional level, which in turn would affect the regional water resources and future water availability. The Peace Region is a critical region for northern British Columbia’s social, environmental, and economic development, due to its potential in various land use activities. This study invest...

Hydrologic regime is highly dependent on climate change, as hydrologic cycle components are directly influenced by climatic conditions. This paper analyzes the impacts of climate change on the hydrologic regime of the Atrak River basin in the northeast of Iran. It drains to the Caspian Sea. The data collected at 11 hydrometeorological stations were examined to detect trends in hydroclimatologic...

Journal: :آب و خاک 0
نرگس صالح نیا محمدعلی فلاحی

abstract in order to evaluation the effects of price policies (wheat guarantee price in each period and its price lag), environmental (planted area) and climatic (min and max average temperature, total annual precipitation, cold-day degree and hot-day degree) factors, we considered wheat yield in razavi-khorasan province (9 cities) for a 13-year statistical period (1371-72 to 1383-84). in this ...

2009
A. K. Gilgen N. Buchmann

Water is an important resource for plant life. Since climate scenarios for Switzerland predict an average reduction of 20% in summer precipitation until 2070, understanding ecosystem responses to water shortage, e.g. in terms of plant productivity, is of major concern. Thus, we tested the effects of simulated summer drought on three managed grasslands along an altitudinal gradient in Switzerlan...

Journal: :محیط شناسی 0
زینب جعفریان دانشگاه علوم کشاورزی و منابع طبیعی ساری، استادیار دانشکده منابع طبیعی آمنه کریم زاده کارشناسی ارشد مرتع داری دانشکده منابع طبیعی، دانشگاه علوم کشاورزی و منابع طبیعی ساری جمشید قربانی دانشگاه علوم کشاورزی و منابع طبیعی ساری، استادیار دانشکده منابع طبیعی محمد اکبرزاده مرکز تحقیقات کشاورزی و منابع طبیعی ساری ، مربی

this study was carried out in sorkhdeh rangeland in semnan province in order to determine the ecological species groups and their relationships with environmental factors as a tool for better management. vegetation sampling was performed in 230 plots under equal random classification method and soil samples were taken in 0-15 depth. climatic and topographic data were extracted by overlaying sam...

ژورنال: علوم آب و خاک 2022

Dust storms in arid and semi-arid regions have harmful impacts on the environment, the economy, and the health of local and global communities. In this study, the frequency of annual dust events in twenty-five stations and five climatic variables including rainfall, maximum annual wind speed, average annual wind speed, maximum annual temperature, and average annual temperature in arid regions o...

Journal: :مرتع و آبخیزداری 0
یوسف نبی پور دانشجوی کارشناسی ارشد آبخیزداری، دانشکده منابع طبیعی، دانشگاه تربیت مدرس مهدی وفاخواه دانشیار، دانشکده منابع طبیعی، دانشگاه تربیت مدرس

rainfall spatial analysis methods are very helpful since there are not enough rainfall gauge stations and watersheds are scattered in large extent. there are many different methods for estimating average precipitation such as; arithmetic method and thiessen polygon. however, the arrangement and location of data and their correlations are not considered by classic methods. thus, geostatistical t...

Journal: :Remote Sensing 2018
Haigen Zhao Shengtian Yang Songcai You Yingchun Huang Qianfeng Wang Qiuwen Zhou

The Integrated Multi-satellitE Retrievals for Global Precipitation Measurement Final Run (IMERGF) product has now been upgraded to Version 4 (V4), which has been available since March 2017. Therefore, it is desirable to evaluate the characteristic differences between the V4 and the previous V3 products. A comprehensive performance evaluation of the errors of the successive V3 and V4 IMERGF prod...

Journal: Pollution 2017

The present study attempts to introduce a method of statistical downscaling with a synoptic view. The precipitation data of Golestan Province has been used for the years 1971 to 2010. Employing multivariable regression, this study models the precipitation gauges in the station scale, by making use of 26 predicting components of model HadCM3, on the basis of two A2 and B2 scenarios. However, the...

Journal: :تحقیقات جغرافیایی 0
مرضیه یونسی دانشگاه اصفهان گروه جغرافیای طبیعی

daily precipitation data from aphrodite's water resources with a spatial resolution of 0.25ëšfor 57 years has been used to detect the trend of precipitation in azerbaijan republic. first of all monthly, seasonal and yearly maps and regional mean time series calculated. according to the annual map mean annual precipitation of the country is about 410 m.m there are two precipitation maximal ...

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