نتایج جستجو برای: as based on thestandardized precipitation index spi and the reconnaissance drought index rdi
تعداد نتایج: 22492948 فیلتر نتایج به سال:
a significant problem in multicarrier communication systems is the necessity to reduce the value of papr (peak-to-average power ratio) of transmitting signal. in this thesis we study the effect of the system parameters such as coding and modulation types on papr and ultimate ber in a mc-cdma system. in this study we consider fading channel as well as the nonlinearity of transmitter’s amplifier ...
Defining droughts based on a single variable/index (e.g., precipitation, soil moisture, or runoff) may not be sufficient for reliable risk assessment and decision-making. In this paper, a multivariate, multiindex droughtmodeling approach is proposed using the concept of copulas. The proposed model, named Multivariate Standardized Drought Index (MSDI), probabilist ically combines the Standardize...
The source region of the Yellow River Basin (SRYRB) is not only sensitive to climate change and vulnerable ecological environment but also primary runoff generating (YRB). Its changes drought wetness profoundly impact water resources security, food production in middle downward reaches YRB. In context global warming, based on daily precipitation, maximum minimum temperature 12 national meteorol...
The objective of this study is to analyze drought patterns in the Tano River Basin (TRB) Ghana using Standardized Precipitation Index (SPI) and Reconnaissance Drought (RDI). data from 1981 2019 for TRB was accessed Climate Hazards Group InfraRed with Station (CHIRPS), extracted into time Series Python four locations within basin used analysis together National Aeronautics Space Administration (...
among the low–dimensional allotropes of carbon, nanotubes and graphene have attracted very much attention from nano–science and nanotechnology specialists. they have been proposed as building blocks in nanometer device engineering. however, these structures are not defect–free. in this thesis, we focused on defective carbon nanotubes and graphene, and studied the effect of couple of very common...
abstract precipitation is an important variable which is used in definition of drought. based on precipitation amounts, some indices are devised for drought monitoring including, the standardized precipitation index (spi) and the standard index of annual precipitation (siap). each of these drought indices are classified into some classes so that each class descripts a given severity of drought....
Abstract In this research, SPEI (standardized precipitation and evaporation index) was used as an alternative index to SPI to study drought in warm southern coastal regions of Iran. Drought has a multi-scale nature that can be analyzed in time scales via analysis of precipitation and temperature data. Therefore, data were colected from 105 synoptic stations in Iran in 2015; Respective stati...
hydrological drought analysis using sdi index in halilrud basin of iran abstract nowadays, drought is considered as damaging environmental phenomenon which affects natural resources and social communities. therefore it will be an important issues that magnitude and effects of these phenomena to be considered. to do this we used l-moment method for regional homogeneity testing. the streamflow dr...
this thesis is going to delineate the concept of the reader as implied in 18th century literary theory; based on the study of the major reader oriented elements of criticism of the age-taste, the sublime, and aesthetic pleasure-its aim is to explain what sott of reader is implied and what kind of response on the part of the reader is proposed in 18th century english literary theory and aestheti...
The purpose of this work is to evaluate the applicability five drought indices (Surface Water Supply Index—SWSI, Reclamation Drought Index—RDI, Streamflow Index—SDI, Standardized Precipitation Index—SPI, and Evaporative Demand Index—EDDI) as tools for monitoring, in identifying duration, intensity, frequency hydrological droughts basins Banabuiú, Castanhão, Orós reservoirs, located state Ceará,...
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