نتایج جستجو برای: rain intensity

تعداد نتایج: 197380  

Journal: :desert 2008
m. pajuohesh h. gh. refahi gh. r. zehtabian a. salehpour jam m. k. kianian

abstract in order to study the effect of super absorbent on runoff volume in slopes and various intensity of rainfall research was accomplish according to split – factorial blocks method with main treatment and two accessory treatments in three replicate . the main treatment consist of three dominant slopes (10 , 20 , 30 percent ) and accessory treatments consist of five levels of substance sup...

2016

This paper presents some data from an two months experiment. The examined dataset included three polarimetric X-band weather radars supplemented by MRRs, disdrometers and rain-gauges. The focus of the paper is on the radar observations. The recorded rain events were of low intensity and this didn’t permit a more advanced evaluation of radars performance. Thus, instead of just showing some daily...

Journal: Desert 2007
A. Salehpour Jam GH. Zehtabian H. Refahi M. Kianian M. Pajuohesh,

Abstract In order to study the effect of super absorbent on runoff volume in slopes and various intensity of rainfall research was accomplish according to split – factorial blocks method with main treatment and two accessory treatments in three replicate . the main treatment consist of three dominant slopes (10 , 20 , 30 percent ) and accessory treatments consist of five levels of substance su...

2008
F. Torricella E. Cattani V. Levizzani

The identification of precipitation areas by microwave based rain algorithms can be improved by means of cloud classification schemes based on multispectral observations. Several recent studies have demonstrated the potential of cloud microphysical and optical characterization for the improvement of passive microwave rain estimates, especially in detecting likely precipitating pixels over land....

2017
Adam Št'ovíček Ani Azatyan M. Ines M. Soares Osnat Gillor

Hot desert ecosystems experience rare and unpredictable rainfall events that resuscitate the arid flora and fauna. However, the effect of this sudden abundance of water on soil microbial communities is still under debate. We modeled varying rainfall amounts and temperatures in desert soil mesocosms and monitored the microbial community response over a period of 21 days. We studied two different...

2015
Josephine Sahner Sri Wilarso Budi Henry Barus Nur Edy Marike Meyer Marife D. Corre Andrea Polle Robert Bradley

Conversion of tropical forests into intensely managed plantations is a threat to ecosystem functions. On Sumatra, Indonesia, oil palm (Elaeis guineensis) plantations are rapidly expanding, displacing rain forests and extensively used rubber (Hevea brasiliensis) agro-forests. Here, we tested the influence of land use systems on root traits including chemical traits (carbon, nitrogen, mineral nut...

2017
Zidan Jiang Xingliang Jiang Zhijin Zhang Yujun Guo Yongfu Li

The cleaning effect of heavy rain (the rainfall reaches 5 mm every day) on surface contamination of insulators is more effective than dew, fog, mist, and other light rain conditions which can initiate leakage currents and increase the likelihood of flashover. It is well understood that heavy rain can wash away contamination from the surface of high voltage (HV) insulators and thereby reduce the...

2008
Mahen Konwar Diganta Kumar Sarma Sanjay Sharma

Two Multi-Layer Perceptron (MLP) models are developed to estimate the radar reflectivity factor (dBZ) and rain intensity (R) from the spectral moments of an L-band wind profiler. Out of the four spectral moment inputs of the MLP models, the backscattered power (P) and Doppler velocity (VD) were found to have better correlation with the rain parameters. The model results were validated with the ...

2006
NICOLAS VILTARD CORINNE BURLAUD CHRISTIAN D. KUMMEROW

This study focuses on improving the retrieval of rain from measured microwave brightness temperatures and the capability of the retrieved field to represent the mesoscale structure of a small intense hurricane. For this study, a database is constructed from collocated Tropical Rainfall Measuring Mission (TRMM) precipitation radar (PR) and the TRMM Microwave Imager (TMI) data resulting in about ...

2013
S. M. HRISTOVA-VELEVA P. S. CALLAHAN R. S. DUNBAR B. W. STILES S. H. YUEH J. N. HUDDLESTON S. V. HSIAO G. NEUMANN B. A. VANHOFF E. RODRIGUEZ D. E. WEISSMAN

Scatterometer ocean surface winds have been providing very valuable information to researchers and operational weather forecasters for over 10 years. However, the scatterometer wind retrievals are compromised when rain is present. Merely flagging all rain-affected areas removes the most dynamic and interesting areas from the wind analysis. Fortunately, the Advanced Earth Observing Satellite II ...

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