نتایج جستجو برای: rainfall analysis

تعداد نتایج: 2848298  

2007
KATJA FRIEDRICH URS GERMANN JONATHAN J. GOURLEY PIERRE TABARY

Radar reflectivity (Zh), differential reflectivity (Zdr), and specific differential phase (Kdp) measured from the operational, polarimetric weather radar located in Trappes, France, were used to examine the effects of radar beam shielding on rainfall estimation. The objective of this study is to investigate the degree of immunity of Kdp-based rainfall estimates to beam shielding for C-band rada...

2005
R. J. FENSHAM R. J. FAIRFAX

1 The relative roles of climate and management for driving changes in woody cover in savannas over the past century are the subject of active debate. Perspectives arising from short-term, small-scale, local experiments are rarely tested over larger scales and longer time frames. 2 Regression analysis and aerial photography were used to assess the relative importance of land-use history (fire an...

2011
KEISUKE ONO SO KAZAMA

The objective of this study is to estimate the daily extreme precipitation distribution in an Asian monsoon region considering orographic precipitation in mountainous areas. For this purpose, the APHRODITE data set and precipitation observations from 150 raingauges throughout Thailand were used as the main input. First, a bias-correction for underestimated precipitation in the APHRODITE data se...

2007
A. M. Greene A. W. Robertson S. Kirshner

A 70-year record of daily monsoon-season rainfall at a network of 13 stations in central-western India is analyzed using a 4state homogeneous hidden Markov model (HMM). The diagnosed states are seen to play distinct roles in the seasonal march of the monsoon, can be associated with “active” and “break” monsoon phases and capture the northward propagation of convective disturbances associated wi...

2011
M. Zhou

This discussion paper is/has been under review for the journal Hydrology and Earth System Sciences (HESS). Please refer to the corresponding final paper in HESS if available. Abstract Monsoon rainfall is of great importance for the agricultural production in both China and India. Understanding its rule and possibility of long term prediction is a challenge for research. This paper gives a joint...

2014

Extreme rainfall frequency analysis for Meteorological Sub-Division 4 of India was analyzed using Lmoments approach. Serial Correlation and Mann Kendall tests were conducted for checking serially independent and stationarity of the observations. The discordancy measure for the sites was conducted to detect the discordant sites. The regional homogeneity was tested by comparing with 500 generated...

Journal: :مدیریت آب و آبیاری 0
حسین انصاری دانشیار گروه مهندسی آب، دانشکده کشاورزی، دانشگاه فردوسی مشهد، مشهد - ایران محمد نادریان فر دانشجوی دکتری تخصصی گروه مهندسی آب، دانشکده کشاورزی، دانشگاه فردوسی مشهد، مشهد - ایران

in recent decades, neyshabour basin as a semi-arid climate has faced with dramatic increasing of groundwater withdrawal. so, water demand management is important in this basin. in this study, the effects of evapotranspiration and rainfall on groundwater fluctuations have been considered with 22 rain gage and evaporation gage station data during 1973-2006. the average amount of rainfall and evap...

2008
A. M. Greene A. W. Robertson

A 70-year record of daily monsoon-season rainfall at a network of 13 stations in central-western India is analyzed using a 4state homogeneous hidden Markov model (HMM). The diagnosed states are seen to play distinct roles in the seasonal march of the monsoon, can be associated with “active” and “break” monsoon phases and capture the northward propagation of convective disturbances associated wi...

2009
M. T. Brunetti G. Tonelli S. Luciani

We are designing a system to forecast rainfall-induced landslides in Italy. The system is based on a set of rainfall thresholds for the possible initiation of landslides, and an ensemble of small scale landslide hazard and risk zonations. Rainfall thresholds include existing and new, national, regional and local empirical thresholds of the intensity-duration (ID) and normalized-ID types. The ne...

2013
T. O. Oseni

Climate variability has been and continues to be, the principal source of fluctuations in global food production in countries of the developing world and is of serious concern in the Kingdom of Swaziland. The mean annual rainfall is considerably low in most parts of the country and temporal variability is quite high. In some places, as much as 60% of the annual total rainfall is recorded in jus...

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