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Use of Senti.el-1 i.agery for flood management i. a reservoi.-regulated ri.er basi.

Fronti.rs of Earth Sci.nce 2018年第3期12卷 506-520页

作者： T. PERROU A. GAR/OUD i. parcharidis Department of Geography Harokopio University of Athens Athens Greece European Space Agency/ESRi. Frascati Rome Italy Department of Geography University Paris Diderot Paris France

Flood hazard moni.ori.g and mappi.g i. of great i.portance because i. represents a si.ni.i.ant contri.uti.n to ri.k management. The present study i.vesti.ated the flood event that occurred downstream from the transboundary Strymon Ri.er basi., more speci.i.ally at Serres basi.-a reservoi.-regulated basi., i. the begi.ni.g of 2015. The focus of thi. study was to better understand the spati.-temporal dynami. of the flood and the causes that i.i.i.ted the hazard. Wi.hi. the Serres basi., the Strymon transboundary ri.er outflows to Lake Kerki.i. whi.h regulates water flow downstream for i.ri.ati.n purposes and flood protecti.n. For thi. research, a dataset of Senti.el-1 SAR GRD i.ages was collected and processed coveri.g the peri.d of October 2014-October 2015 to i.vesti.ate the water level changes i. Lake Kerki.i. Based on SAR i.ages, bi.ary water/non-water products and multi.emporal RGB ampli.ude i.ages were generated and i.terpreted. Senti.el-1 products have proved to be an effecti.e tool on flood hazard dynami. extensi.n mappi.g and esti.ati.n of water extent bodi.s retai.ed by small reservoi.s. i. agreement wi.h hydro-meteorologi.al data and the hi.h-resoluti.n DEM, i. was concei.ed that the flood event occurred due to the water volume flowi.g from upstream i. the reservoi. and the large amount of water drai.i.g from the tri.utari.s i.to nearby sub-basi.s. Moreover, i.effi.i.nt water management of the overwhelmi.g water flow through the dam could further strengthen the flood event. The proposed approach, whi.h i. enti.ely based on open access remotely sensed data and processi.g tools, could be i.plemented i. the same area for past flood events to produce archi.e retrospecti.e data, as well as i. other si.i.ar reservoi.-regulated ri.er basi.s i. terms of water management and flood ri.k management.

关键词： flood mappi.g Senti.el-1 SAR bi.ary i.ages multi.emporal i.age ri.er basi.

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九寨沟震区地表形变监测及震损物源估算

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长江流域资源与环境 2019年第1期28卷 184-191页

作者：熊轲詹宇 i.saak parcharidis 杜杰第宝锋四川大学-香港理工大学灾后重建与管理学院四川成都610207 四川大学建筑与环境学院四川成都610065 Department of Geography Harokopio University 九寨沟风景名胜区管理局四川阿坝藏族羌族自治州623402

地震及其次生地质灾害(滑坡、崩塌、泥石流等)引发的松散物质(即震损物源)剧烈迁移会给震区环境与安全造成极为深远的影响。"8·8"九寨沟地震发生后,大量的震损物源加剧了九寨沟景区地质灾害易发性及湖泊淤积风险。获取震损物源的分布... 详细信息

地震及其次生地质灾害(滑坡、崩塌、泥石流等)引发的松散物质(即震损物源)剧烈迁移会给震区环境与安全造成极为深远的影响。"8·8"九寨沟地震发生后,大量的震损物源加剧了九寨沟景区地质灾害易发性及湖泊淤积风险。获取震损物源的分布与数量,是减少灾害风险与保护湿地景观的基础。因此,利用Di.SAR技术实施地表形变监测,基于形变数据,再结合光学遥感数据解译和实地观测,估算九寨沟景区震损物源,解析空间分布与数量特征。研究结果显示:地震在震中的西北侧造成了较大的沉降形变,在震中东南侧也产生了轻微隆起形变,雷达视线向形变量达-23～11 cm;景区震损物源呈带状分布,沿沟谷和道路较为发育,以五花海区域最为集中,估算数量达1. 658×10~5m^3。研究结果将为九寨沟景区地质灾害隐患的监测防治及河湖湿地的绿色防淤提供支撑。

关键词： “8·8”九寨沟地震 Di.SAR 地表形变遥感解译震损物源

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Balloon valvuloplasty as desti.ati.n therapy i. elderly wi.h severe aorti. stenosi.： a cardi.c catheteri.ati.n study

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Journal of Geri.tri. Cardi.logy 2015年第3期12卷 218-225页

作者： Vasi.ei.s Kamperi.i. Stavros Hadji.i.ti.des Antoni.s Zi.kas Georgi.s Si.nos Georgi.s Kazi.aki. George Gi.nnakoulas Sophi.-Anastasi. Mouratoglou Athanasi. Sarafi.ou i.anni. Ventouli. Georgi.sK Efthi.i.di. Georgi.s parcharidis Haralambos Karvouni. The Fi.st Department of Cardi.logy AHEPA University Hospital Thessaloniki Greece

Background i. the current era of transcatheter aorti. valve replacement, there i. renewed i.terest i. balloon aorti. valvuloplasty （BAV） and i.vasi.e hemodynarni. evaluati.n of aorti. stenosi. （AS）. The current report ai.ed to study the i.vasi.e hemodynami.s of se- vere AS pati.nts treated wi.h BAV as desti.ati.n therapy and to i.enti.y factors associ.ted wi.h better hemodynami. outcome and prognosi.. Methods From 2009 to 2012, 63 hi.h ri.k elderly pati.nts were treated wi.h BAV as desti.ati.n therapy for symptomati. severe AS and were all prospecti.ely i.cluded i. the study. Thei. hemodynami.s were i.vasi.ely evaluated duri.g catheteri.ati.n, pre- and post-BAV at the same sessi.n. All Post-BAV pati.nts were regularly followed-up. Results The pati.nts （82 ~ 6 years, 52% male） had post-BAV aorti. valve area i.dex （AVAi. si.ni.i.antly i.creased and mean pressure gradi.nt （MPG） si.ni.i.antly reduced. Duri.g the follow-up of 0.9 （maxi.um 3.3） years, those wi.h post-BAV AVAi.〈 0.6 cm2/m2 compared wi.h the AVAi._〉 0.6 cm2/m2 group had si.ni.i.antly hi.her mortali.y （60% vs. 28%, log-rank P = 0.02）, even after adjusti.g for age, gender, atri.l fi.ri.lati.n, chroni. ki.ney di.ease, di.betes melli.us, coronary artery di.ease and EuroSCORE [HR： 5.58, 95% confi.ence i.terval （Ci.： 1.62-19.20, P = 0.006]. The only i.dependent predi.tor of moderate AS post-BAV was the pre-BAV AVAi.i.crease by 0.1cm^2/m^2 （OR： 3.81, 95% Ci. 1.33-10.89, P = 0.01）. Pre-BAV AVAi.〉 0.39 cm^2/m^2 could predi.t wi.h sensi.i.i.y 84% and speci.i.i.y 70% the post-BAV hemodynami. outcome. Conclusi.ns BAV as desti.ati.n therapy for severe AS offered i.medi.te and si.ni.i.ant hemodynami. i.provement. The survi.al was si.ni.i.antly better when a moderate degree of AS was present.

关键词： Balloon aorti. valvuloplasty i.vasi.e hemodynami.s Outcome Severe aorti. stenosi. The elderly

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A Method for Developi.g Sei.mi. i.tensi.y Maps from Twi.ter Data

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Journal of Ci.i. Engi.eeri.g and Archi.ecture 2016年第7期10卷 839-852页

作者： Stathi. G. Arapostathi. parcharidis i.aak Stefanaki. Emmanuel Drakatos George Kalogeras i.anni. Department of Geography Harokopio University Kallithea-Athens 17671 Greece Department of Geodesy and Geomati.s Engi.eeri.g University of New Brunswick Frederincton E3B EA3 Canada Nati.nal Observatory of A them Athens 11810 Greece

Ai. of thi. arti.le, i. to present a methodology for extracti.g macrosei.mi. i.tensi.y i.formati.n and produci.g sei.mi. i.tensi.y maps from VGi.（volunteered geographi. i.formati.n）. As a VGi.source for obtai.i.g and assessi.g macrosei.mi. observati.ns, the authors chose twi.ter. Our methodology i. vali.ated i. two recent earthquakes occurred i. Greece： the January 26, 2014 ML = 5.8 i. Kefalli.i., and the November 17, 2014 ML = 5.2 i. Evoi.os. Twi.ter data publi.hed wi.hi. the fi.st 6 h, 12 h, 24 h and 48 h after the earthquake occurrence were analyzed to develop sei.mi. i.tensi.y maps. Those maps were evaluated through i.tensi.y maps for the same earthquakes, publi.hed by i.ternati.nal i.sti.utes. Evaluati.n results provi.e a strong empi.i. evi.ence for the credi.i.i.y of our methodology, the accuracy of the produced sei.mi. i.tensi.y maps and accentuate VGi. generated by twi.ter, as an adequate alternati.e source for collecti.g macrosei.mi. i.formati.n.

关键词： Volunteered geographi. i.formati.n twi.ter sei.mi. i.tensi.y i.tensi.y maps earthquakes.

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