نتایج جستجو برای: rainfall analysis

تعداد نتایج: 2848298  

2000
C. M. Mannaerts D. Gabriels

This paper presents rainfall erosivity values derived from a 7-year rainfall recording in the Cape Verde islands, Central East Atlantic. The data set consisted of 63 storm events, continuously registered in 15-min intervals. Kinetic energy of storm rainfall corresponded to established values in other tropical locations. Two algorithms to estimate erosivity, expressed as energy times intensity, ...

Journal: :caspian journal of environmental sciences 2008
m. b. hiremath a. josephrajkumar v. mukund r. ramesh p. k. shetty

studies of rainfall variation generally focus on large areas. for example, in india, the area average monsoon rainfall series of the whole country or meteorological subdivisions are used. this would be of no use for local agriculture, particularly in places where rainfall is very high or very low, especially for crops like small cardamom and vanilla which are very sensitive to soil moisture and...

B. Saghafian, H. Taheri Shahraeeni and J. Ghayoomian, S. Rahimi Bandarabadi,

Rainfall is one of the most important climatic variables in the hydrology cycle. In flood estimation as well as environmental pollution studies in medium to large watersheds not only mus temporal pattern of rainfall t be known, but also the knowledge of its spatial distribution is required. Estimation of daily rainfall distribution without comparison and selection of suitable methods may lead...

2006
SHUYI S. CHEN JOHN A. KNAFF FRANK D. MARKS

Vertical wind shear and storm motion are two of the most important factors contributing to rainfall asymmetries in tropical cyclones (TCs). Global TC rainfall structure, in terms of azimuthal distribution and asymmetries relative to storm motion, has been previously described using the Tropical Rainfall Measuring Mission Microwave Imager rainfall estimates. The mean TC rainfall distribution and...

2017
Zhiwei Zhu Shengjie Chen Kai Yuan Yini Chen Song Gao Zhenfei Hua

The middle and lower reaches of the Yangtze River basin (MLRYB) are prone to flooding because their orientation is parallel to the East Asian summer monsoon rain belt. Since the East Asian summer monsoon presents pronounced intraseasonal variability, the subseasonal prediction of summer precipitation anomalies in the MLRYB region is an imperative demand nationwide. Based on rotated empirical or...

Journal: :تحقیقات جغرافیایی 0
زهره مریانجی هواشناسی سید ابوالفضل مسعودیان دانشگاه اصفهان حسین عساکره علی اکبر سبزی پرور دانشگاه بوعلی سعید موحدی دانشگاه اصفهان

abstract one of the most variability of atmospheric parameter is precipitation, which changes seasonally. it is important to understand exact characteristic of rainfall seasonal variable. therefore, it is avoidable to study rainfall season in hamedan province, because hameden is one of the important centers of agriculture in iran. in this research, the seasonal variability of rainfall is consid...

Journal: :International Journal of Atmospheric Sciences 2016

1995
MARTIN ZWICK HUI SHU

(Received) This study explores an information-theoretic/log-linear approach to multivariate time series analysis. The method is applied to daily rainfall data (4 sites, 9 years), originally quantitative but here treated as dichotomous. The analysis ascertains which lagged variables are most predictive of future rainfall and how season can be optimally deened as an auxiliary predicting parameter...

Journal: :journal of rangeland science 2013
jinbai huang jing li hiroshi yasuda jiawei wen

the objectives of this study were to understand the rainfall characteristics of thewind-water erosion crisscross region on the northern loess plateau, china, to provide basisfor the studies on mitigation of soil erosion, estimation on surface water resources andlocal hydrological circle, etc. the liudaogou catchment with representative climatic andhydrologic conditions of wind-water erosion cri...

Journal: :international journal of agricultural science, research and technology in extension and education systems 2011
shahram karimi-googhari

rainfall and evapotranspiration are the two most popular climatic factors which have crucial function on agricultural production. rainfall can be directly measured easily in an area but evapotranspiration is estimated from weather data. in this study reference evapotranspiration eto was estimated using penman–monteith equation. monthly rainfall and evapotarnspiration were plotted and compared i...

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