Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 1900 for “"Rainfall"”.
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Extreme rainfall regime characterization in Sardinia using daily rainfall data
… is fundamental the knowledge of the ``extreme rainfall regime'' in the area where the hydraulic structures must be set up. Indeed the design flood is commonly evaluated as output of rainfall-runoff models that receive as input the quantitative description of a rainfall extreme event with a …
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Tropical orographic rainfall regimes according to the tropical rainfall measuring mission
… region of complex terrain. The Tropical Rainfall Measuring Mission (TRMM) precipitation radar (PR) 2A25v6 data is used to determine the vertical and horizontal structure and propagation of the precipitation systems as well as precipitation frequency and intensity. The resulting regimes …
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Extreme rainfall intensities and long-term rainfall risk from tropical cyclones
… a methodology for the frequency of extreme rainfall intensities caused by tropical cyclones (TCs) in coastal areas. The mean rainfall field associated with a TC with maximum tangential wind speed Vmax, radius of maximum winds Rmax, and translation speed Vmax, is obtained using a …
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Rainfall variability over southern Africa
Southern Africa is subject to high inter annual rainfall variability and the factors influencing southern African rainfall are not fully understood. The variability has been linked with various sea surface temperature anomalies (SSTAs) in each of the three major ocean basins as well as variability …
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Mechanisms of observed spatial heterogeneity in rainfall variability over the winter rainfall zone of South Africa
Renewed interest in South Africa's Winter Rainfall Zone (WRZ) has emerged in the wake of the 2015–2017 “Day Zero” drought and water crisis. However, this has yielded little insight into the spatial heterogeneity in WRZ climatological seasonality and rainfall variability or their drivers, despite …
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Decadal rainfall variability over Southern Africa
… with high seasonal and interannual rainfall variability combined with rain-dependent agriculture. This variability is underpinned by influences from ENSO and other oceanic forcing, and known to exhibit quasi-decadal variability at 16-20 years (Tyson, 1975). This study uses a …
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Rainfall-induced Landslide Hazard Rating System
… a Landslide Hazard Rating System for the rainfall-induced landslides in the Chenyulan River basin area in central Taiwan. This system is designed to provide a simplified and quick evaluation of the possibility of landslide occurrence, which can be used for planning and risk management. A …
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Modeling karst aquifer response to rainfall
… potential gradient in a karst aquifer system. Rainfall excess in the form of potential energy from sinkhole sub-basins is input to element nodes and routed through a one-dimensional finite-element mesh to the karst spring represented by the last node in the finite element mesh. A fracture-flow …
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Transformation of Rainfall by Plant Canopy (Erosion)
… is influenced by plant cover over the soil. Rainfall characteristics which are transformed as a result of interception by plant canopy and which are important factors in models of splash detachment are drop size, drop velocity and rainfall intensity. The influence of plant canopy on drop size …
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Nonlinear Analysis of the Rainfall-Runoff Process
Made available in DSpace on 2014-12-08T23:57:10Z (GMT). No. of bitstreams: 1 6901417.pdf: 4488055 bytes, checksum: 01460d3270b796e42322f62c1d23cb1a (MD5) Previous issue date: 1968
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Variability of summer rainfall over southwestern Madagascar
… to March) of the period 1971 to 2000 at four rainfall stations in southwestern Madagascar. For each station, the frequency of wet days was correlated with ENSO indices, SIOD index, SST, 850 hPa geopotential height, zonal and meridional winds at the surface. Composite anomalies of moisture flux …
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Evaluation of rainfall-induced landslide transit characterization
… for landslide hazard analysis in this study. The Rainfall-induced Landslide Hazard Rating System is developed and applied in the landslide transit characterization analyses. The results show that landslide transit characterization varies according to geological and topographic factors in the study …
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On rainfall-induced landslides : a deterministic approach
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2000.
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Analysis of Soil Splash Erosion Under Simulated Rainfall
Threshold energy based on the regression results, required to initiate soil splash, was dependent upon soil type, with greater clay content soils exhibiting a greater threshold energy. Soil splash rate increased with increasing kinetic energy, with large differences between soils. Soil loss …
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Rainfall variability characteristics over the East African coast.
This study explores inter-annual rainfall variability over the East African coast region (Kenya and Tanzania) for the period 1980-2010 and focuses on dry and wet spell characteristics during the two rainy seasons. The atmospheric and ocean conditions associated with the rainfall variability are …
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Optimizing and verifying an ensemble-based rainfall model
… verified the stochastic Recursive Cluster-point Rainfall model of Chatdarong (2006). A novel error metric allows comparison of the stochastic ensemble of rainfall image forecasts to a single observation (radar) image. The error metric forgives position errors and provides a flexible framework for …
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Short-term rainfall prediction using a multifractal model
… to predict multifractal measure of temporal rainfall intensity by using Kalman filter, and gives some examples of prediction for generated rainfall. The model for the rainfall generation proposed here is established using a continuous-time, discrete-scale lognormal cascade (CLC) with AR(1) …
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Multi-sensor rainfall data assimilation using ensemble approaches
Rainfall is a major process transferring water mass and energy from the atmosphere to the surface. Rainfall data is needed over large scales for improved understanding of the Earth climate system. Although there are many instruments for measuring rainfall, none of them can provide continuous global …
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