Die Grösse der Globalstrahlung verschieden orientierter Flächen     

Fl. Ambrosetti  J. C. Thams 《Pure and Applied Geophysics》1953,26(1):198-210

Zusammenfassung Mit einem Solarimeter Moll-Gorczynski wurden in Locarno-Monti die Wärmemengen gemessen, die von Sonne+Himmel auf die fünf Seiten eines nach Süden gerichteten, senkrecht stehenden Einheitswürfels eingestrahlt werden. Unter Hinzuziehung von Messungen der Intensität der direkten Sonnenstrahlung konnte auch an heiteren Tagen der Anteil der Himmelsstrahlung bestimmt werden. Es zeigte sich zudem, dass die Strahlung der verschiedenen Flächen zu jener der Horizontalen in einem bestimmten, mit der Jahreszeit wechselnden, Verhältnis steht. Mit Hilfe dieser Verhältniszahlen lassen sich langjährige Registrierungen der Globalstrahlung der horizontalen Fläche auf andere Flächen umrechnen. Schliesslich wurde noch der Strahlungsgenuss der Flächen des Würfels für bedeckte Tage ermittelt.

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Summary By means of a solarimeter Moll-Gorczynski the quantities of heat were measured at Locarno-Monti which radiated from the sun and sky upon the five sides of unity cube facing South and standing vertically. By adding the measurements of the intensity of direct sun radiation it was possible on bright days also to determine the proportion by sky radiation. Furthermore it was revealed that the radiation for the various planes moves in a definite proportion, varying in accordance with the season, to that for the horizontal plane. With the help of these proportional figures, registrations over many years of global radiation for the horizontal plane can be converted into those for other planes. Finally, the radiation of the surfaces of the cube on cloudy days was determined.

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Riassunto A Locarno-Monti furono misurate con un solarimetro Moll-Gorczynski, le quantità di energia calorica, irradiate da sole+cielo sulle cinque facce di un cubo, unitario, disposto perpendicolarmente e orientato verso sud. Considerando misure della intensità della radiazione solare diretta si potè calcolare la parte della radiazione del cielo anche per giorni sereni. Inoltre si trovò che la radiazione per le diverse superfici sta a quella della superficie orizzontale in un determinato rapporto, variabile con le stagioni. Con l'aiuto di tali rapporti si può calcolare dalla registrazione pluriannuale della radiazione globale sulla superficie orizzontale, quella per altre superfici. Da ultimo fu determinata anche la quantità di radiazione ricevuta dalle superfici del cubo in giorni coperti.

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Gravitational drainage systems in urban areas: case study (Galaţi town, Romania)     

Fl. Zamfirescu  I. Popa  Al. Danchiv 《Environmental Geology》2006,49(6):887-896

The water leakage in the urban areas causes a continuous rise in the water table, with harmful effects. An experimental drainage system, based on horizontal well technology, was designed and implemented in a populated area. Groundwater flow modeling was used to assess the hydrodynamic efficiency of the system through drain conductance parameter estimation.  相似文献   

Temporali e precipitazioni temporalesche al margine meridionale delle Alpi     

Fl. Ambrosetti 《Pure and Applied Geophysics》1954,28(1):261-272

Riassunto Per il periodo 1936–1950 vengono comunicati il numero medio annuo dei giorni con temporali (udito almeno un tuono) e la statistica dei periodi di giorni successivi con temporali, secondo la loro lunghezza, per 8 stazioni poste pressapoco su di una sezione da sud a nord attraverso le Alpi, con estremi Milano e Zurigo. Per Locarno-Monti, periodo 1936–1953, sono confrontate le precipitazioni dei giorni con temporali con la quantità totale. Per il semestre aprile-settembre del quinquennio 1949–1953, le precipitazioni di Locarno-Monti dei giorni con temporali vengono suddivise secondo i tre tipi di temporali: frontali, di Südstau e locali, tenendo conto che nello stesso giorno ad ore diverse possono verificarsi temporali di diverso tipo, e paragonate fra loro.

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Zusammenfassung Von acht Stationen, die ungefähr auf der Linie Mailand-Zürich liegen, wurden für die Periode 1936–1950 die mittlere Anzahl der Tage mit Gewittern und Andauer aufeinanderfolgender Gewittertage berechnet. Des weiteren wurde für die Station Locarno-Monti (1936–1953) der Anteil der Niederschlagsmenge an Gewittertagen an der Gesamtmenge ermittelt und für die Periode 1949–1953 von April bis September die Niederschlagsmenge an den Tagen untersucht, an denen Front-, Südstauoder Lokalgewitter vorkamen. Auch die Fälle, an denen am gleichen Tag verschiedene Gewitterarten auftraten, wurden berücksichtigt.

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Comunicazione presentata alla II Assemblea Generale della Società Italiana di Geofisica e Meteorologia, Genova, 23–25 Aprile 1954.  相似文献   

A Methodology for the Definition of Geotechnical Mine Sectors Based on Multivariate Cluster Analysis     

Nazareth  Ana Flávia Delbem Vidigal  Lana  Milene Sabino 《Geotechnical and Geological Engineering》2021,39(6):4405-4426

This paper offers a new method for the definition of geotechnical sectors in open pit mines based on multivariate cluster analysis. A geological-geotechnical data set of a manganese open pit mine was used to demonstrate the methodology. The data set consists of a survey of geological and geotechnical parameters of the rock mass, measured directly in several points of the mine, structured initially in twenty-eight variables. After the preprocessing of the data set, the clustering technique was applied using the k-Prototype algorithm. The squared Euclidean distance was used to quantify the proximity between numerical variables, and the Jaccard's coefficient of similarity was used to quantify the proximity between the nominal variables. The different cluster results obtained were validated by the multivariate analysis of variance. The identification of cluster structures was achieved by plotting them on the mine map for spatial visualization and definition of geotechnical sectors. These sectors are spatially contiguous and relatively homogeneous regarding their geological–geotechnical properties, indicated by a high density of points of the same group. It was possible to observe a great adherence of the proposed sectors to the mine geology, demonstrating the practical representativeness of the clustering results and the proposed sectors.

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Punica granatum Shell Preparation,Characterization, and Use for Crystal Violet Removal from Aqueous Solution          下载免费PDF全文

Marilice B. Silveira  Flávio A. Pavan  Nilton F. Gelos  Eder C. Lima  Silvio L. P. Dias 《洁净——土壤、空气、水》2014,42(7):939-946

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Ionization of the earth’s atmosphere by solar and galactic cosmic rays   总被引：1，自引：0，他引：1  

Ilya G. Usoskin  Laurent Desorgher  Peter Velinov  Marisa Storini  Erwin O. Flückiger  Rolf Bütikofer  Gennady A. Kovaltsov 《Acta Geophysica》2009,57(1):88-101

A brief review of the research of atmospheric effects of cosmic rays is presented. Numerical models are discussed, that are capable to compute the cosmic ray induced ionization at a given location and time. Intercomparison of the models, as well as comparison with fragmentary direct measurements of the atmospheric ionization, validates their applicability for the entire atmosphere and the whole range of the solar activity level variations. The effect of sporadic solar energetic particle events is shown to be limited on the global scale, even for the most severe event, but can be very strong locally in polar regions, affecting the physical-chemical properties of the upper atmosphere, especially at high altitudes. Thus, a new methodology is presented to study cosmic ray induced ionization of the atmosphere in full detail using realistic numerical models calibrated to direct observations.  相似文献   

A Chart for Judging Optimal Sample Spacing for Ore Grade Estimation: Part II     

Drumond  David Alvarenga  Amarante  Flávio Azevedo Neves  Koppe  Vanessa Cerqueira  Costa  João Felipe Coimbra Leite 《Natural Resources Research》2020,29(1):551-560

Natural Resources Research - Resources of mineral deposits are commonly estimated using data extracted from rock cores obtained by drilling. Information of good quality and quantity is essential to...  相似文献   

Hyper‐resolution global hydrological modelling: what is next?          下载免费PDF全文

Marc F. P. Bierkens  Victoria A. Bell  Peter Burek  Nathaniel Chaney  Laura E. Condon  Cédric H. David  Ad de Roo  Petra Döll  Niels Drost  James S. Famiglietti  Martina Flörke  David J. Gochis  Paul Houser  Rolf Hut  Jessica Keune  Stefan Kollet  Reed M. Maxwell  John T. Reager  Luis Samaniego  Edward Sudicky  Edwin H. Sutanudjaja  Nick van de Giesen  Hessel Winsemius  Eric F. Wood 《水文研究》2015,29(2):310-320

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Erratum to: Modeling the photosynthetically active radiation in South West Amazonia under all sky conditions     

Leonardo J. G. Aguiar  Graciela R. Fischer  Richard J. Ladle  Ana C. M. Malhado  Flávio B. Justino  Renata G. Aguiar  José Maria N. da Costa 《Theoretical and Applied Climatology》2012,108(3-4):641-643

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Modelling of ground water recharge-potential in the hard-rock Aravalli terrain,India: a GIS approach   总被引：2，自引：2，他引：0  

C. Bhuiyan  Ramesh P. Singh  W. A. Flügel 《Environmental Earth Sciences》2009,59(4):929-938

Modelling of ground water recharge-potential in hard-rock areas principally aims at water-resource evaluation. Various techniques are available to assess recharge-potential, and their capability in estimating recharge is also variable. However, the water level fluctuation method is found capable in computing actual ground water recharge. Demarcation of ground water recharge-potential zones in arid and semi-arid regions is of great importance for human survival and sustainable development. Remote sensing and geographic information systems (GIS) techniques have been widely used by numerous researchers for qualitative assessment of ground water potential of a basin or terrain. In the present study, a GIS-based water table fluctuation method has been attempted for quantitative modelling of ground water recharge of the hard-rock Aravalli terrain. This GIS-based model is further used to evaluate recharge-potential of the terrain by integrated assessment of infiltration capacity, normal rainfall, and its cumulative frequency.  相似文献