One‐year‐long runoff forecast by a single snowpack evaluation     

Rodolfo Soncini‐Sessa  Marialuisa Volta 《水文研究》2005,19(7):1419-1430

A degree‐day‐based model is presented for a 1 year ahead runoff forecast, with 1 day time steps. The input information is a single snowpack evaluation collected at the beginning of the snowmelt season. The snow‐cover dynamics, the key information for long‐term snowmelt forecast, are described by the snow‐line dynamics, i.e. by the movements of the downhill snowpack limit. The snowmelt volume, estimated by the snow‐line dynamics, is the exogenous input of an autoregressive transformation model. The model is calibrated by a least‐squares procedure on the basis of observed daily runoff data and the corresponding measurements of the snowpack volume (one measurement per year). A real‐world case study on the Alto Tunuyan River basin (2380 km², Argentinean Andes) is presented. The 1 year ahead Alto Tunuyan River runoff patterns, computed for both calibration and validation periods, reveal high agreement with observed streamflows. Copyright © 2004 John Wiley & Sons, Ltd.  相似文献   

Late Mesozoic crustal extension along the southern Eurasian margin: evidence from volcanic rocks of the Bangong-Nujiang Suture zone, Tibet     

Decibel FAUSTINO-ESLAVA  Jonathan A. AITCHISON  Rodolfo A. TAMAYO  Jr.Graciano P. YUMUL  Jr.Carla B. DIMALANTA 《地球学报》2009,30(Z1):8-8

The Mesozoic was a period of marginal basin formations, closures and reactivations along segments of the southern Eurasian margin. Remnants of some of these events are now preserved as exposures of Juras-sic-Cretaceous ophiolites and ophiolitic mélanges, thick sequences of Jurassic flysch deposits and Middle Cretaceous sedimentary and volcanic formations along the Bangong-Nujiang Suture Zone (BNS).  相似文献   

Extreme rainfall-induced lahars and dike breaching, 30 November 2006, Mayon Volcano,Philippines   总被引：1，自引：1，他引：0  

E. M. R. Paguican  A. M. F. Lagmay  K. S. Rodolfo  R. S. Rodolfo  A. M. P. Tengonciang  M. R. Lapus  E. G. Baliatan  E. C. ObilleJr. 《Bulletin of Volcanology》2009,71(8):845-857

On 29–30 November 2006, heavy rains from Supertyphoon Durian remobilized volcanic debris on the southern and eastern slopes of Mount Mayon, generating major lahars that caused severe loss of life and property in downstream communities. The nearby Legaspi City weather station recorded 495.8 mm of rainfall over 1.5 days at rates as high as 47.5 mm/h, far exceeding the initiation threshold for Mayon lahars. For about 18 h, floods and lahars from the intense and prolonged rainfall overtopped river bends, breaching six dikes through which they created new paths, buried downstream communities in thick, widespread deposits, and caused most of the 1,266 fatalities. In order to mitigate damage from future lahars, the deposits were described and analyzed for clues to their generation and impact on structures and people. Post-disaster maps were generated from raw ASTER and SPOT images, using automated density slicing to characterize lahar deposits, flooded areas, croplands, and urbanized areas. Fieldwork was undertaken to check the accuracy of the maps, especially at the edges of the lahar deposits, and to measure the deposit thicknesses. The Durian event was exceptional in terms of rainfall intensity, but the dikes eventually failed because they were designed and built according to flood specifications, not to withstand major lahars.  相似文献   

Study on the Historical Distribution of Metals in Aquatic Sediments     

Wagner José Barreto  Dílson Norio Ishikawa  Andressa Clara Nicolau  Evandro Domingues Magalhães  Fabiana Inoue  Paulo dos Santos Nora  Rodolfo Funfas  Sônia Regina Giancoli Barreto 《洁净——土壤、空气、水》2010,38(7):608-613

In this study, the historical distribution of metals, phosphorous, and sulfur at four different depths in the sediments of different lakes formed in the course of an urban river (in Londrina, Parana State, Brazil) were determined. The transport of metals along the course of the river was observed mainly for Mn, Cr, and Zn. High concentrations of Pb in the Capivara Bay and Cr in the river were attributed to contamination from a battery plant and a tannery, respectively. The concentrations of heavy metals in the deepest layers of the sediments remain high several years after deposition.  相似文献   

Carlin-type Gold Prospects in Surigao del Norte, Mindanao Island, Philippines: Their Geology and Mineralization Potential     

Victor B. Maglambayan    Sj Montes    Katherine Hipol    Maireen Mamitag    Rikki Pamela Pineda    Raymond Rodolfo    Noel Oliveros  Antonio Sy 《Resource Geology》2005,55(3):145-154

Abstract. Three calcareous sedimentary rock-hosted Carlin type-like gold prospects were mapped in a mineral production sharing agreement area of Philex Gold Philippines Inc. in Taganaan municipality, Surigao del Norte province in Mindanao island in the Philippines. They occur along a 20–25 km long trend of known epigenetic gold and porphyry copper deposits that lie close to several splays of the Philippine Fault Zone. The gold district forms part of the Late Cretaceous Eastern Mindanao Range that hosts early Paleogene and late Pliocene to Quaternary intrusive rocks.
Gold is invisible in the jasperoid outcrops in Lascogon, Napo, and Danao prospects. The jasperoids occur in lenses of marls belonging to the Taganaan Marl Member that is associated to a turbiditic member of the Middle Miocene Mabuhay Formation. The marl lenses include gently dipping interbedded silty limestones and calcareous shales. The "invisible gold" mineralization in silicified calcareous rocks resembles Carlin-type deposits. Based on the mapped igneous and sedimentary rocks, a possible heat source for the gold mineralization is either or both of the two main phases of intrusion, Mabuhay An-desite or Alipao Andesite Porphyry. Forty-eight rock samples, fifteen stream sediment samples, and one soil sample were critical in delineating the general features of the potential Carlin-type prospects. The gold grades of jasperoids in the three prospects range from trace amounts to 20 g/t Au. Regional studies of gold and porphyry copper mineralization in the Surigao del Norte mineral district are important in delineating ore targets for drilling in the three prospects.  相似文献   

Discussion: “Evidence for a transgressive barrier within a regressive strandplain system: implications for complex response to environmental change” by Hein,et al. (2013), Sedimentology 60, 469–502     

Sérgio R. Dillenburg  Eduardo G. Barboza  Patrick A. Hesp  Maria Luiza C.C. Rosa  Rodolfo J. Angulo  Maria C. Souza  Paulo C.F. Giannini  André O. Sawakuchi 《Sedimentology》2014,61(7):2205-2212

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The symbiotic binary system RX Puppis: a possible recurrent nova with a Mira companion     

Joanna Miko&#;ajewska  Estela Brandi †  Warren Hack  Patricia A. Whitelock  Rodolfo Barba ‡  Lia Garcia  Freddy Marang 《Monthly notices of the Royal Astronomical Society》1999,305(1):190-210

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A physics-based earthquake simulator and its application to seismic hazard assessment in Calabria (Southern Italy) region     

Rodolfo Console  Anna Nardi  Roberto Carluccio  Maura Murru  Giuseppe Falcone  Tom Parsons 《Acta Geophysica》2017,65(1):243-257

The use of a newly developed earthquake simulator has allowed the production of catalogs lasting 100 kyr and containing more than 100,000 events of magnitudes ≥4.5. The model of the fault system upon which we applied the simulator code was obtained from the DISS 3.2.0 database, selecting all the faults that are recognized on the Calabria region, for a total of 22 fault segments. The application of our simulation algorithm provides typical features in time, space and magnitude behavior of the seismicity, which can be compared with those of the real observations. The results of the physics-based simulator algorithm were compared with those obtained by an alternative method using a slip-rate balanced technique. Finally, as an example of a possible use of synthetic catalogs, an attenuation law has been applied to all the events reported in the synthetic catalog for the production of maps showing the exceedance probability of given values of PGA on the territory under investigation.  相似文献