نتایج جستجو برای: rainfall forecasting

تعداد نتایج: 72486  

2016
Jingwan Li Ashish Sharma Jason Evans Fiona Johnson

Addressing systematic biases in regional climate model simulations of extreme rainfall is a necessary first step before assessing changes in future rainfall extremes. Commonly used bias correction methods are designed to match statistics of the overall simulated rainfall with observations. This assumes that change in the mix of different types of extreme rainfall events (i.e. convective and non...

2000
V. KRISHNAMURTHY J. SHUKLA

A gridded daily rainfall dataset prepared from observations at 3700 stations is used to analyze the intraseasonal and interannual variability of the summer monsoon rainfall over India. It is found that the major drought years are characterized by large-scale negative rainfall anomalies covering nearly all of India and persisting for the entire monsoon season. The intraseasonal variability of ra...

Journal: :The American journal of tropical medicine and hygiene 2007
Pietro Ceccato Tewolde Ghebremeskel Malanding Jaiteh Patricia M Graves Marc Levy Shashu Ghebreselassie Andom Ogbamariam Anthony G Barnston Michael Bell John del Corral Stephen J Connor Issac Fesseha Eugene P Brantly Madeleine C Thomson

Eritrea has a successful malaria control program, but it is still susceptible to devastating malaria epidemics. Monthly data on clinical malaria cases from 242 health facilities in 58 subzobas (districts) of Eritrea from 1996 to 2003 were used in a novel stratification process using principal component analysis and nonhierarchical clustering to define five areas with distinct malaria intensity ...

2013
D. L. Shrestha D. E. Robertson Q. J. Wang T. C. Pagano H. A. P. Hapuarachchi

The quality of precipitation forecasts from four Numerical Weather Prediction (NWP) models is evaluated over the Ovens catchment in Southeast Australia. Precipitation forecasts are compared with observed precipitation at point and catchment scales and at different temporal resolutions. The four models evaluated are the Australian Community Climate Earth-System Simulator (ACCESS) including ACCES...

Journal: :تحقیقات جغرافیایی 0
زهرا سیفری پژوهشکده هواشناسی سازمان هواشناسی کشور سیده مژگان قاضی میرسعید پژوهشکده هواشناسی سازمان هواشناسی کشور مجتبی ذوالجودی پژوهشکده هواشناسی سازمان هواشناسی کشور

abstract: in this study, it has been tried to test the accuracy of output and hence the model efficiency in the predictions of 24 and 48 hour precipitation forecasting by choosing different schemes be assessed. therefore, in order to test the accuracy of model product, two conditions of rainfall precipitation and lack of rainfall precipitation were considered. four thresholds were taken. adapti...

2017
Esther Love Darkoh John Aseidu Larbi Eric Adjei Lawer

This study investigated the effects of climatic variables, particularly, rainfall and temperature, on malaria incidence using time series analysis. Our preliminary analysis revealed that malaria incidence in the study area decreased at about 0.35% annually. Also, the month of November recorded approximately 21% more malaria cases than the other months while September had a decreased effect of a...

2008
Renata J. ROMANOWICZ Marzena OSUCH

The aim of this work is the development of an integrated Data Based Mechanistic (DBM) rainfall-flow/flow-routing model of the Upper River Narew catchment and the river reach between Bondary and Suraż suitable for scenario analysis. The modelling tool developed is formulated in MATLAB-SIMULINK language. It has a flexible, modular structure that can easily be extended by adding new features, such...

1997
A. Allen Bradley

Lumped parameter hydrologic models are frequently used for operational streamflow forecasting in the United States. With the deployment of the Weather Surveillance Radar 1988 Doppler (WSR88D), many hydrologists will use radar-rainfall data as input to these models. WSR-88D precipitation products can be used in a variety of ways (Shedd and Fulton, 1993; Lindsey, 1993). In this paper, we examine ...

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