نتایج جستجو برای: standardized precipitation index

تعداد نتایج: 516279  

خلیلی, علی , رحمانی, الهام , لیاقت, عبدالمجید ,

The growing season climatic parameters, especially rainfall, play the main role to predict the yield production. Therefore, the main objective of this research was to find out some possible relations among meteorology parameters and drought indexes with the yield using classical statistical methods. To achieve the objective, ten meteorological parameters and twelve drought indexes were evaluate...

Journal: :آب و خاک 0
وجیهه محمدی ثابت محمد موسوی بایگی حجت رضائی پژند

introduction: the southern oscillation is a large scale phenomenon that changes the normal oscillating air pressure on both sides of the pacific ocean. it disrupted the normal conditions and the patterns of temperature and precipitation change in the nearby region and other regions of the world. this phenomenon is caused by changing the water slope in the pacific ocean between peru (northwester...

Journal: :IOP conference series 2022

Abstract This study aims to analyse the extreme events and diurnal climate for Indonesia capital city in Kalimantan islands, called IKN. Dataset was prepared rainfall data over 60 years based from 1954 2015 APHRODITE database. In addition, hydroclimate event analysed using SPI (Standardized Precipitation Index) ETCCDI (The Expert Team on Climte Change Detction Index). The results showed that pr...

2012
Ping Han Pengxin Wang Miao Tian Shuyu Zhang Junming Liu Dehai Zhu

The standardized precipitation index (SPI) was used to quantify the classification of drought in the Guanzhong Plain, China. The autoregressive integrated moving average (ARIMA) models were developed to fit and forecast the SPI series. Most of the selected ARIMA models are seasonal models (SARIMA). The forecast results show that the forecasting power of the ARIMA models increases with the incre...

ژورنال: علوم آب و خاک 2008
خلیلی, علی , رحمانی, الهام , لیاقت, عبدالمجید ,

The growing season climatic parameters, especially rainfall, play the main role to predict the yield production. Therefore, the main objective of this research was to find out some possible relations among meteorology parameters and drought indexes with the yield using classical statistical methods. To achieve the objective, ten meteorological parameters and twelve drought indexes were evaluate...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه یزد - دانشکده منابع طبیعی 1392

خشکسالی به عنوان بلای طبیعی و پدیده ای اجتناب‏ناپذیر در مناطق خشک و نیمه خشک که مسائل مدیریت منابع آب امری ضروری است، وقوع می یابد. در دهه های اخیر بین حوادث طبیعی که جمعیت های انسانی را تحت تاثیر قرار داده است، پدیده خشکسالی از نظر فراوانی، شدت، مدت، فضای تحت پوشش، تلفات جانی، خسارت های اقتصادی و اثر های اجتماعی دراز مدت در جامعه، بیشتر از سایر بلایای طبیعی بوده است. بررسی روند شدت خشکسالی در ...

Journal: :IOP conference series 2021

Abstract Drought is an anomaly from normal climatic conditions, which affects most of the zones worldwide. monitoring a very crucial step to detect drought vulnerable and raise awareness about future development. The present study aimed investigate efficiency indicators: standardized precipitation index (SPI) Normalized Difference Water Index (NDWI) spatially description conditions Babylon gove...

2017
Somsubhra Chattopadhyay Dwayne R. Edwards Yao Yu Athanasios Loukas

Climatic variability can lead to large-scale alterations in the hydrologic cycle, some of which can be characterized in terms of indices involving precipitation depth, duration and frequency. This study evaluated the spatiotemporal behavior of precipitation indices over the Kentucky River watershed for both the baseline period of 1986–2015 and late-century time frame of 2070–2099. Historical pr...

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