Search Results - "Pegram, G. G. S."

Copula based multisite model for daily precipitation simulation by Bárdossy, A., Pegram, G. G. S.

“…From the point of view of multisite stochastic daily rainfall modelling, there are two new ideas introduced in this paper. The first is the use of asymmetrical…”
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Investigation of hydrological time series using copulas for detecting catchment characteristics and anthropogenic impacts by Sugimoto, Takayuki, Bárdossy, András, Pegram, Geoffrey G. S, Cullmann, Johannes

“…Global climate change can have impacts on characteristics of rainfall–runoff events and subsequently on the hydrological regime. Meanwhile, the catchment…”
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A comparison of ASCAT and modelled soil moisture over South Africa, using TOPKAPI in land surface mode by Sinclair, S., Pegram, G. G. S.

“…In this paper we compare two independent soil moisture estimates over South Africa. The first estimate is a Soil Saturation Index (SSI) provided by automated…”
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Empirical Mode Decomposition in 2-D space and time: a tool for space-time rainfall analysis and nowcasting by Sinclair, S., Pegram, G. G. S.

“…A data-driven method for extracting temporally persistent information, at different spatial scales, from rainfall data (as measured by radar/satellite) is…”
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Comparison of soil moisture fields estimated by catchment modelling and remote sensing: a case study in South Africa by Vischel, T, Pegram, G.G.S, Sinclair, S, Wagner, W, Bartsch, A

“…The paper compares two independent approaches to estimate soil moisture at the regional scale over a 4625 km2 catchment (Liebenbergsvlei, South Africa). The…”
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Empirical Mode Decomposition on the sphere: application to the spatial scales of surface temperature variations by Fauchereau, N., Pegram, G. G. S., Sinclair, S.

“…Empirical Mode Decomposition (EMD) is applied here in two dimensions over the sphere to demonstrate its potential as a data-adaptive method of separating the…”
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Space‐time conditional disaggregation of precipitation at high resolution via simulation by Bárdossy, András, Pegram, Geoffrey G. S.

“…Daily rainfall data are more plentiful and reliable than pluviometer data and are the best data set to start data‐repair from, worldwide. Clusters of…”
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SBMcast – An ensemble nowcasting technique to assess the uncertainty in rainfall forecasts by Lagrangian extrapolation by Berenguer, Marc, Sempere-Torres, Daniel, Pegram, Geoffrey G.S.

“…► Error propagation studies in hydrological models need the description of rainfall structure. ► The ensemble approach fulfills the requirements of error…”
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Downscaling rainfields in space and time, using the String of Beads model in time series mode by Pegram, G. G. S., Clothier, A. N.

“…The String of Beads model is a space-time model of rainfields measured by weather radar. It is here driven by two auto-regressive time series models, one at…”
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Improved radar rainfall estimation at ground level by Wesson, S. M., Pegram, G. G. S.

“…A technique has been developed to provide an estimate of the rainfall reaching the earth's surface by extrapolating radar data contained aloft to ground level,…”
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Hydraulics of Skimming Flow on Modeled Stepped Spillways by Pegram, Geoffrey G. S, Officer, Andrew K, Mottram, Samuel R

“…Two sets of models of stepped spillways of slope 1 upon 0.6 with the same crest-shape and with a range of step sizes (0.25-2.0 m on the 1:10 scale and 0.5-2.0…”
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A nested multisite daily rainfall stochastic generation model by (Sri) Srikanthan, Ratnasingham, Pegram, Geoffrey G.S.

“…This paper describes a nested multisite daily rainfall generation model which preserves the statistics at daily, monthly and annual levels of aggregation. A…”
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Global analysis of runs of annual precipitation and runoff equal to or below the median: run magnitude and severity by Peel, Murray C., Mcmahon, Thomas A., Pegram, Geoffrey G. S.

“…Fluctuations of wet and dry years have long been investigated in the climatology and hydrology literature. In this, the second of two papers investigating runs…”
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Global streamflows – Part 1: Characteristics of annual streamflows by McMahon, Thomas A., Vogel, Richard M., Peel, Murray C., Pegram, Geoffrey G.S.

“…This is the first of three related papers that summarizes streamflow characteristics of a set of 1221 global rivers. The rivers are well distributed…”
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Global analysis of runs of annual precipitation and runoff equal to or below the median: run length by Peel, Murray C., Pegram, Geoffrey G. S., Mcmahon, Thomas A.

“…The investigation of fluctuations of wet and dry years has a long history in the climatology and hydrology literature. In this, the first of two papers…”
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A sensitivity assessment of the TOPKAPI model with an added infiltration module by Sinclair, S., Pegram, G.G.S.

“…► Investigate sensitivity of PyTOPKAPI model to systematic bias in forcing/parameters. ► Sensitivity assessed over years for a wide array of climates and land…”
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Design rainfall estimation in South Africa using Bartlett-Lewis rectangular pulse rainfall models by SMITHERS, J. C, PEGRAM, G. G. S, SCHULZE, R. E

“…Relatively few recording raingauges with long, reliable records are available in South Africa for the estimation of short duration ( less than or equal to 24…”
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A Simple Methodology for Estimating Mean and Variability of Annual Runoff and Reservoir Yield under Present and Future Climates by McMahon, Thomas A., Peel, Murray C., Pegram, Geoffrey G. S., Smith, Ian N.

“…Overlying the challenge of managing within natural hydroclimatic variability is the likely modification of runoff variability along with average runoff due to…”
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Revisiting reservoir storage–yield relationships using a global streamflow database by McMahon, Thomas A., Pegram, Geoffrey G.S., Vogel, Richard M., Peel, Murray C.

“…Annual and monthly streamflows for 729 rivers from a global data set are used to assess the adequacy of five techniques to estimate the relationship between…”
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Global streamflows – Part 2: Reservoir storage–yield performance by McMahon, Thomas A., Vogel, Richard M., Pegram, Geoffrey G.S., Peel, Murray C., Etkin, Derek

“…This is the second of three papers describing hydrologic analyses of monthly and annual streamflow data for a global set of 729 unregulated rivers with at…”
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