نتایج جستجو برای: standardized precipitation index spi

تعداد نتایج: 519315  

Aridity and drought are two inevitable occurrences of the climate change in the region. So, any kinds of planning and futurism, without regard to them, lead to failure. Climate change cause drought phenomenon. The anomalies and irregularities in the precipitation mainly cause drought. Fars Province, one of the important centers of agriculture, population and industry in the country, with specif...

Journal: :journal of rangeland science 0
mahtab safari shad phd student, department of natural resource, university of sari, iran. alireza ildoromi associate professor, dept of range& watershed management, malayer university iran. davoud akhzari davoud akhzari, department of watershed and rangeland management, malayer university, malayer 6571995863, iran. e-mail: [email protected], [email protected]

drought is a major problematic phenomenon mostly for semi-arid areas of iran. during drought periods, reduction in vegetation levels causes such problems as soil erosion, surface runoff, flood risk, etc. therefore, the assessment of drought effects on plant covers is the most important issue. this research was conducted in 2015 using the extracted vegetation indices from moderate resolution ima...

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...

Drought monitoring is one of the key factors in drought risk management and the use of drought indices such as the standardized precipitation index (SPI) is a useful tool in this regard. The aim of this study is to evaluate and zone drought risk in different years and return periods in Karkheh basin. For this purpose, Standardized Precipitation Index (SPI) as a selected index was used to assess...

2004
Ian J. Cottingham Steve Goddard Shifeng Zhang X. Wu K. Lu A. Rutledge William J. Waltman

The National Agricultural Decision Support System (NADSS) is a web based geospatial decision support system used to aid producers and decision makers in analyzing and effectively mitigating the effects of drought. The NADSS application is unique in its implementation, containing web-based implementations of commonly utilized drought indices including the Newhall Simulation Model (NSM), Palmer D...

2014
ZENGCHAO HAO AMIR AGHAKOUCHAK

Accurate and reliable drought monitoring is essential to drought mitigation efforts and reduction of social vulnerability. A variety of indices, such as the standardized precipitation index (SPI), are used for drought monitoring based on different indicator variables. Because of the complexity of drought phenomena in their causation and impact, droughtmonitoring based on a single variable may b...

Journal: :Atmospheric and climate science 2021

Drought is primarily an agricultural phenomenon that refers to conditions where plants are responsive certain levels of moisture stress affect both the vegetative growth and yield crops. It occurs when supply stored in soil insufficient meet optimum need a particular type crop. Causes drought Bangladesh related climate variability non-availability surface water resources. While it may be possib...

Journal: :Water 2023

The aim of this study is to investigate the patterns and trends drought occurrence in northern part Poland on example Łeba river basin years 1956–2015. meteorological was conducted basis Standardized Precipitation Index (SPI) scale 1, 3, 6, 9, 12 months. Annual precipitation totals did not show significant changes analyzed period, except for station Wejherowo, which characterized by a increasin...

2010
SERGIO M. VICENTE-SERRANO SANTIAGO BEGUERÍA JUAN I. LÓPEZ-MORENO

The authors propose a new climatic drought index: the standardized precipitation evapotranspiration index (SPEI). The SPEI is based on precipitation and temperature data, and it has the advantage of combining multiscalar character with the capacity to include the effects of temperature variability on drought assessment. The procedure to calculate the index is detailed and involves a climatic wa...

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