Search Results - "Clarke, Robin T."

Estimating suspended sediment concentrations from turbidity measurements and the calibration problem by Minella, Jean P.G, Merten, Gustavo H, Reichert, José M, Clarke, Robin T

“…In situ turbidity meters are being increasingly used to generate continuous records of suspended sediment concentration in rivers. However, the usefulness of…”
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Reduced precipitation over large water bodies in the Brazilian Amazon shown from TRMM data by Paiva, Rodrigo Cauduro Dias, Buarque, Diogo Costa, Clarke, Robin T., Collischonn, Walter, Allasia, Daniel Gustavo

“…Tropical Rainfall Measurement Mission (TRMM) data show lower rainfall over large water bodies in the Brazilian Amazon. Mean annual rainfall (P), number of wet…”
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Issues of spatial correlation arising from the use of TRMM rainfall estimates in the Brazilian Amazon by Clarke, Robin T., Buarque, Diogo Costa, de Paiva, Rodrigo Cauduro Dias, Collischonn, Walter

“…This paper discusses issues arising when Tropical Rainfall Measuring Mission (TRMM) estimates of rainfall characteristics are calculated for the sparsely…”
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Issues of experimental design for comparing the performance of hydrologic models by Clarke, R.T

“…Research to compare the performance of precipitation-runoff models (and indeed models of other hydrologic and geophysical processes) is increasingly reported…”
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A bootstrap calculation of confidence regions for proportions of sediment contributed by different source areas in a 'fingerprinting' model by Clarke, Robin T.

“…When ‘fingerprinting’ is used to identify what proportions Ps (s = 1, …, g) of suspended sediment come from g different source areas, measures of the…”
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How should trends in hydrological extremes be estimated? by Clarke, Robin T.

“…A comparison of six procedures for estimating the linear trend parameter β in annual maximum 1 day river flows at five sites in southern Brazil showed marked…”
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effects of sample scheduling and sample numbers on estimates of the annual fluxes of suspended sediment in fluvial systems by Horowitz, Arthur J, Clarke, Robin T, Merten, Gustavo Henrique

“…Since the 1970s, there has been both continuing and growing interest in developing accurate estimates of the annual fluvial transport (fluxes and loads) of…”
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On the (mis)use of statistical methods in hydro-climatological research by Clarke, Robin T.

“…This paper discusses four areas where, in the author's view, statistical methods are misused in reporting results of hydro-climatological research. They are:…”
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Calculating uncertainty in regional estimates of trend in streamflow with both serial and spatial correlations by Clarke, Robin T.

“…An expression is derived for the variance of a regional linear trend in annual runoff (units: mm of runoff per km2 per year), averaged over P gauging sites,…”
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The relation between interannual storage and frequency of droughts, with particular reference to the Pantanal Wetland of South America by Clarke, Robin T.

“…A large volume of natural storage within a drainage basin has a marked effect on its regime of hydrologic extremes. In this paper, the carry‐over effects from…”
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A comparison of Amazon rainfall characteristics derived from TRMM, CMORPH and the Brazilian national rain gauge network by Buarque, Diogo Costa, de Paiva, Rodrigo Cauduro Dias, Clarke, Robin T., Mendes, Carlos André Bulhões

“…This paper compares four selected characteristics (mean annual rainfall; mean number of wet days in the year; mean number of days with 2mm or more of rain; and…”
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Long‐term sediment yield from a small catchment in southern Brazil affected by land use and soil management changes by Minella, Jean P.G., Merten, Gustavo H., Barros, Claúdia A.P., Ramon, Rafael, Schlesner, Alexandre, Clarke, Robin T., Moro, Michele, Dalbianco, Leandro

“…Sediments produced from eroding cultivated land can cause on‐site and off‐site effects that cause considerable economic and social impacts. Despite the…”
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Evaluating sampling efficiency when estimating sediment source contributions to suspended sediment in rivers by fingerprinting by Clarke, Robin T., Minella, Jean P. G.

“…A general method is proposed which measures the increase in uncertainty when sampling effort is reduced in sediment fingerprinting. The method gives…”
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A critique of present procedures used to compare performance of rainfall-runoff models by Clarke, Robin T

“…The purpose of this paper is to stimulate debate on how to compare models of watershed behavior. It is argued that procedures commonly used at present to…”
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Spatial correlation in precipitation trends in the Brazilian Amazon by Buarque, Diogo Costa, Clarke, Robin T., Mendes, Carlos Andre Bulhoes

“…A geostatistical analysis of variables derived from Amazon daily precipitation records (trends in annual precipitation totals, trends in annual maximum…”
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Comparison of forecasts of mean monthly water level in the Paraguay River, Brazil, from two fractionally differenced models by Prass, Taiane S., Bravo, Juan Martin, Clarke, Robin T., Collischonn, Walter, Lopes, Sílvia R. C.

“…The paper compares forecasts of mean monthly water levels up to six months ahead at Ladário, on the Upper Paraguay River, Brazil, estimated from two long‐range…”
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A comparison of extreme rainfall characteristics in the Brazilian Amazon derived from two gridded data sets and a national rain gauge network by Clarke, Robin T., Bulhoes Mendes, Carlos Andre, Costa Buarque, Diogo

“…Two issues of particular importance for the Amazon watershed are: whether annual maxima obtained from reanalysis and raingauge records agree well enough for…”
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An experimental comparison of methods for estimating rainfall intensity-duration-frequency relations from fragmentary records by Svensson, Cecilia, Clarke, Robin T., Jones, David A.

“…The calculation of intensity-duration-frequency (IDF) relationships for rainfall requires records of rainfall accumulated over periods shorter than 1 day when…”
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Consistency and normality of estimates of hydrological extremes derived from a model for fragmented data by Clarke, Robin T.

“…This paper deals with a non-standard application of frequency analysis of extremes of hydrologic variables in which some years of record are incomplete. If F(…”
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Statistically combining rainfall characteristics estimated from remote-sensed and rain gauge data sets in the Brazilian Amazon-Tocantins Basins by Clarke, Robin T., Buarque, Diogo C.

“…This paper explores the use of a parametric geostatistical model for combining rainfall characteristics derived from rain gauge data with the same…”
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