نتایج جستجو برای: month spi time series scale end of march then
تعداد نتایج: 21343879 فیلتر نتایج به سال:
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...
in many arid and semi-arid regions, groundwater resources exploitation is inevitable to meet water demands. this paper aims to study the response of phreatic and confined aquifers in a multilayer groundwater system to climate variability. to achieve this aim, gorgan plain multilayer aquifer has been investigated using different meteorological and hydrological drought indices (di, pni, spi and g...
the current study aimed at investigating the relationship between motivation and test preparation strategies (tpss) used by iranian pre-university students in their preparation period for the university entrance exam (uee). due to the importance of uee in iran, this study also attempted to show its impact on these two important variables. to this end, 100 pre-university students in an iranian p...
Meteorological drought monitoring is important for drought early warning and disaster prevention. Regional meteorological drought can be evaluated and analyzed with standardized precipitation index (SPI). Two main processing schemes are frequently adopted: (1) mean of all SPI calculated from precipitation at individual stations (SPI-mean); and (2) SPI calculated from all-station averaged precip...
Droughts are natural events and could lead to declining surface water quality of regional basin. Understanding the complex impacts of drought may help authorities to monitor changes in different regional basin and to make appropriate decision on development of a river basin management plan. In this study 20 years annual precipitation time series from 1994-2013 from 7 synoptic weather stations l...
Drought is one of the major water-related natural hazards. Understanding spatial and temporal variation rainfall great importance in water resources planning management as it related with food security scarce resource, which becomes critical case drought events. The advent GIS to produce spatially interpolated map helps managers undertake appropriate measures relief prioritization mitigation wo...
Meteorological droughts occur when there is deficiency in rainfall; i.e. rainfall availability below some acclaimed normal values. Hence, the greater challenge to be able obtain suitable methods for assessing drought occurrence, its onset or initiation and termination. Thus, an attempt was made this paper evaluate performance of Standardised Precipitation Index (SPI) Anomaly (SPAI) characterise...
today, scouring is one of the important topics in the river and coastal engineering so that the most destruction in the bridges is occurred due to this phenomenon. whereas the bridges are assumed as the most important connecting structures in the communications roads in the country and their importance is doubled while floodwater, thus exact design and maintenance thereof is very crucial. f...
Drought is one of the disastrous natural hazards with complex seasonal and spatial patterns. Understanding patterns drought predicting likelihood inter-seasonal persistence can provide substantial operational guidelines for water resource management agricultural production. This study examines by identifying frequency in northeastern region Pakistan. The Standardized Precipitation Index (SPI) a...
the major aim of this study was to investigate the relationship between iq, eq and test format in the light of test fairness considerations. this study took this relationship into account to see if people with different eq and iq performed differently on different test formats. to this end, 90 advanced learners of english form college of ferdowsi university of mashhad were chosen. they were ask...
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