Physics and Chemistry of the Earth, Part C: Solar, Terrestrial & Planetary Science最新文献_第3页

The E layer shape: the combination with existing models E层形状:与现有模型的结合

Physics and Chemistry of the Earth, Part C: Solar, Terrestrial & Planetary Science Pub Date : 2001-01-01 Epub Date: 2001-06-04 DOI: 10.1016/S1464-1917(01)00006-X

J. Hafner , R. Leitinger , J. Titheridge

引用次数: 0

The shape and evolution of lower hybrid density cavities observed by FREJA 用FREJA观察低杂化密度空腔的形状和演化

Physics and Chemistry of the Earth, Part C: Solar, Terrestrial & Planetary Science Pub Date : 2001-01-01 Epub Date: 2001-12-06 DOI: 10.1016/S1464-1917(00)00110-0

S.H. Høymork , H.L. Pécseli , B Lybekk , J. Trusen , A. Eriksson

引用次数: 8

Particle acceleration and wave phenomena in the auroral region 极光区域的粒子加速和波动现象

Physics and Chemistry of the Earth, Part C: Solar, Terrestrial & Planetary Science Pub Date : 2001-01-01 Epub Date: 2001-12-06 DOI: 10.1016/S1464-1917(00)00084-2

R.L. Lysak , M. André

引用次数: 1

Calibration of tipping bucket hyetographs 倾卸斗温度计校正

Physics and Chemistry of the Earth, Part C: Solar, Terrestrial & Planetary Science Pub Date : 2001-01-01 Epub Date: 2002-02-14 DOI: 10.1016/S1464-1917(01)95017-2

H. Bergmann, H. Breinhälter, O. Hable, R. Krainer

{"title":"Calibration of tipping bucket hyetographs","authors":"H. Bergmann, H. Breinhälter, O. Hable, R. Krainer","doi":"10.1016/S1464-1917(01)95017-2","DOIUrl":"10.1016/S1464-1917(01)95017-2","url":null,"abstract":"<div><p>The Institute for Hydraulics and Hydrology of the Technical University Graz, Austria operates two hydrological observation nets - one in the area of Eastern Styria and the other one in the city of Graz. Precipitation, meteorological and runoff data are collected.</p><p>Comparative measurements of the tipping bucket hyetographs have shown the deviation between the recorded and the real precipitation intensity. Aim of the presented project was to get calibration curves for all tested precipitation gauges.</p><p>The following steps were necessary:</p><p>a) Development of a micro processor controlled calibration system. The calibration instrument is able to record a series of measurements for determining calibration factors.</p><p>b) Development of a control software for the calibration device, that is able to take over the menu control with a laptop and store the determined values in an MS Excel worksheet. These values are used for calculating correction values and to display them in an adequate graphical way.</p><p>c) Development of a practicable application software for correction of the measured precipitation data.</p><p>The determined correction factors permit to consider the source of failure (e.g. location, ageing and wear of the material) and make available improved hydrological data.</p></div>","PeriodicalId":101026,"journal":{"name":"Physics and Chemistry of the Earth, Part C: Solar, Terrestrial & Planetary Science","volume":"26 10","pages":"Pages 731-736"},"PeriodicalIF":0.0,"publicationDate":"2001-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1464-1917(01)95017-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73604377","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Image analysis for debris flow properties estimation 泥石流特性估计的图像分析

Physics and Chemistry of the Earth, Part C: Solar, Terrestrial & Planetary Science Pub Date : 2001-01-01 Epub Date: 2001-10-02 DOI: 10.1016/S1464-1917(01)00059-9

R. Genevois , A. Galgaro , P.R. Tecca

{"title":"Image analysis for debris flow properties estimation","authors":"R. Genevois , A. Galgaro , P.R. Tecca","doi":"10.1016/S1464-1917(01)00059-9","DOIUrl":"10.1016/S1464-1917(01)00059-9","url":null,"abstract":"<div><p>On August 1998 some debris flows were recorded by an automated monitoring system at Acquabona creek (Eastern Italian Alps). In this paper, motion picture of the flow, timing of single coarse particles on the flow surface, geophone recordings and ultrasonic logs were used to obtain velocity, depth and particle size data for the August 17 debris flow. Analogical images, recorded from zenithal camera located along the flow channel axis, have been converted in digital format and then processed in order to obtain a suitable identification of single flowing particles. Through image analysis techniques, grain-size and surface velocity distributions of debris flows are estimated. These properties are of the outmost importance in developing a proper rheological model for debris flows. Front velocities ranged from 1.8 to 4 m/s and corresponding flow surface velocities ranged from 2.26 to 4.18 m/s. A range of slurry shear strengths and viscosities occur in different surges of the same event. These differences in rheological flow behaviour appear to be influenced by concentration of particles and by flow particle-size distributions too. Coarser slurry are related a Bingham flow and finer slurry is associated to Newtonian flow. The development of rigid plugs is an index of rheological behaviour. In the observed surge Bingham flow is characterised by plug widths between 62 and 94% of flow width for flow depth higher than 45 cm. When depth dropped below 45 cm, slurry is finer and more liquid and flow transformed to hyperconcentrated flow. Turbulent small less concentrated surges are caused by a sort of pushing effect of the following coarser debris surge.</p></div>","PeriodicalId":101026,"journal":{"name":"Physics and Chemistry of the Earth, Part C: Solar, Terrestrial & Planetary Science","volume":"26 9","pages":"Pages 623-631"},"PeriodicalIF":0.0,"publicationDate":"2001-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1464-1917(01)00059-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78873906","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 25

Debris flow magnitude in the Eastern Italian Alps: data collection and analysis 意大利东部阿尔卑斯地区泥石流震级:数据收集与分析

Physics and Chemistry of the Earth, Part C: Solar, Terrestrial & Planetary Science Pub Date : 2001-01-01 Epub Date: 2001-09-17 DOI: 10.1016/S1464-1917(01)00064-2

V. D'Agostino , L. Marchi

引用次数: 49

Radar: Is it a new technology applicable to water level gauging? 雷达:它是一种适用于水位测量的新技术吗?

Physics and Chemistry of the Earth, Part C: Solar, Terrestrial & Planetary Science Pub Date : 2001-01-01 Epub Date: 2002-02-14 DOI: 10.1016/S1464-1917(01)95020-2

S Kranz, T Zenz, U Barjenbruch

引用次数: 9

A statistical method to predict debris flow deposited volumes on a debris fan 预测碎屑扇上泥石流沉积体积的统计方法

Physics and Chemistry of the Earth, Part C: Solar, Terrestrial & Planetary Science Pub Date : 2001-01-01 Epub Date: 2001-09-17 DOI: 10.1016/S1464-1917(01)00067-8

L. Franzi, G. Bianco

{"title":"A statistical method to predict debris flow deposited volumes on a debris fan","authors":"L. Franzi, G. Bianco","doi":"10.1016/S1464-1917(01)00067-8","DOIUrl":"10.1016/S1464-1917(01)00067-8","url":null,"abstract":"<div><p>The present paper aims to give a useful methodology to predict the debris volume <em>G<sub>s</sub></em> associated to a debris flow and deposited on the basin's terminal fan in the alpine region. Predicting the occurrence and the magnitude of a debris flow is often a very difficult task, as it is necessary to consider the variability of the geological, hydraulic and pluviometric factors connected to the beginning, propagation and deposition of a debris flow. These factors are not easily quantifiable, as well as their influence on the debris volumes deposited on the debris fan. Even if some useful mathematical (and deterministic) relations have been proposed by some authors to predict the likely debris volumes, they do not seem to take into account the high variability of the influencing factors. For these reasons a statistical investigation of the relationship between <em>Gs</em> and the basin area <em>A</em> has been undertaken. By means of well known statistical methodologies and by using a sample of about two hundred data (referred to the alpine region), a new criterion is proposed, in the present paper, for the prediction of a probable <em>Gs</em> value. For a given basin, this value is obtained on the basis of a statistical risk degree arbitrarily chosen. A probabilistic methodology is also proposed, which, when results of an accurate survey are not available for a particular basin, may provide a rational basis for a first hazard zonation and the design of mitigative measures.</p></div>","PeriodicalId":101026,"journal":{"name":"Physics and Chemistry of the Earth, Part C: Solar, Terrestrial & Planetary Science","volume":"26 9","pages":"Pages 683-688"},"PeriodicalIF":0.0,"publicationDate":"2001-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1464-1917(01)00067-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80318620","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 24

Auroral particle acceleration by waves 极光粒子被波加速

Physics and Chemistry of the Earth, Part C: Solar, Terrestrial & Planetary Science Pub Date : 2001-01-01 Epub Date: 2001-12-06 DOI: 10.1016/S1464-1917(00)00099-4

R. Bingham , R.A. Cairns , R.O. Dendy , V.D. Shapiro , P.K. Shukla , L. Stenflo

引用次数: 4

A new model for the Schumann-Runge bands of O2 O2舒曼-龙格带的新模型

Physics and Chemistry of the Earth, Part C: Solar, Terrestrial & Planetary Science Pub Date : 2001-01-01 Epub Date: 2001-08-01 DOI: 10.1016/S1464-1917(01)00040-X

B.R. Lewis , S.T. Gibson , F.T. Hawes , L.W. Torop

引用次数: 7