7,479 research outputs found
Snowmelt Floods in Relation to Compound Drivers in North America and Europe
No full textV okviru raziskave smo analizirali dejavnike, ki vplivajo na nastanek poplav zaradi taljenja snežne odeje in spadajo pod t.i. sestavljene dogodke. Do sestavljenih dogodkov pride ob sočasnem nastopu različnih naravnih pojavov ali nesreč, ko se le-ti pojavijo časovno ali prostorsko sočasno. Posledično je vpliv takih dogodkov večji kot zaradi običajnih dogodkov. V okviru naloge smo analizirali različne vplivne dejavnike kot so temperatura zraka, padavine, debelina snežne odeje, hitrost vetra, vlažnost tal, itd.. Izbrali smo 107 porečij v Evropi in Severni Ameriki, kjer so bili na voljo merjeni podatki o pretokih za obdobje 1979-2019. Največje letne poplave smo klasificirali glede na definirano tipologijo z upoštevanjem naslednjih tipov poplav: poplave zaradi kombinacije padavin in taljenja snežne odeje, poplave zaradi taljenja snežne odeje, poplave zaradi dolgotrajnih padavin in poplave zaradi kratkotrajnih padavin. Omenjene tipe poplav smo nadalje razdelili še glede na mokre in sušne začetne razmere na porečju.
Rezultati so pokazali, da se na izbranih porečjih najpogosteje pojavijo poplave zaradi taljenja snežne odeje. Na porečjih, ki so locirana na višjih nadmorskih višinah, se najpogosteje pojavljajo poplave zaradi kratkotrajnih ali dolgotrajnih padavinskih dogodkov. To je mogoče presenetljiv rezultat, saj so na višjih nadmorskih višinah temperature običajno nižje in bi pričakovali večji vpliv snega, vendar so bile poplave v primeru teh porečjih najpogosteje posledica večjih poletnih neviht. Na porečjih, ki so locirana na nižjih nadmorskih višinah, pa so poplave najpogosteje posledica taljenja snežne odeje. Nadalje smo ugotovili, da je predhodna vlažnost (mokri predhodni pogoji) eden izmed pomembnih dejavnikov nastanka poplav. Vlažnost tal je imela tudi največji relativni vpliv na merjene podatke o pretokih.
Izvedene so bile tudi analize sezonskosti. Zaznali smo območja, kjer je sezonskost zelo izrazita, kar pomeni, da se poplave skoraj vedno pojavijo v istem obdobju leta, kot je Severna Amerika ter osrednja Norveška in Švedska. To lahko pripelje do sočasnega pojava poplav na večjih območjih, kar še povečuje njihov vpliv in z njimi povezano gmotno škodo.This study assessed the drivers of snowmelt floods in relation to compound events. Compound events are when multiple drivers/hazards occur in the same geographic region/time scale, thus amplifying their impacts. The climate drivers considered in this study are temperature, precipitation, snow thickness, snow liquid water equivalent, wind speed, vapour pressure and soil moisture content. 107 different catchments across North America and Europe were investigated, from the years 1979-2019. Each annual maximum flood was sorted into a different flood typology. These typologies were rain-on-snow floods, snowmelt floods, long precipitation floods, and short precipitation floods. These four flood typologies are all split into another two categories, with a wet initial condition and a dry initial condition.
The results indicate that the considered catchments have snowmelt floods being the dominant flood type. The high elevation catchments had the dominant typologies being short precipitation floods and long precipitation floods. This initially surprised us, as higher elevations have colder weather and thus are expected to be more influenced by snowfall. However, these mountainous regions often experience large summer rainstorms, thus creating the maximum annual flood. Lower elevation catchments had snowmelt driven floods as the dominant typology. The wet initial conditions were also much more prevalent than the dry initial conditions, proving the importance of the soil moisture condition. This was confirmed through an investigation of the relative influence of the climate factors on the determination of the river discharge. Here, soil moisture had the largest relative influence.
Results were determined for the seasonality of the floods as the average day of the year the floods occur on. Based on the results of this, there are geographic regions, such as northeastern North America and central Sweden and Norway, which have a strong seasonality and the floods occur at roughly the same time every year. This can lead to spatially compounding events, where many hazards occur in one geographic region at the same time, thus amplifying their impacts
Steven Johnson Author Talk Poster
No full textK-State Book NetworkA poster advertising an author talk by Steven Johnson at Kansas State University on September 3, 2014. Steven Johnson's book "The Ghost Map" was the 2014-2015 common book
Steven Bialer and Patti Smith, July 1978
No full textMusician, poet, and author Patti Smith sits on a bed in a hotel room in July 1978. The photograph was taken by Don Hamerman as part of a session for "Unicorn Times," an alternative performing arts periodical in Washington, D.C. Steven Bialer, the Design Director for "Unicorn Times," is seated on the bed next to Smith
Steven Garber
No full textSteven Garber speaks on the importance and value of truth.
Steven Garber is the principal of The Washington Institute for Faith, Vocation & Culture, which is focused on reframing the way people understand life, especially the meaning of vocation and the common good. A consultant to foundations, corporations and educational institutions, he is a teacher of many people in many places. The author of The Fabric of Faithfulness: Weaving Together Belief and Behavior, and Visions of Vocation: Common Grace for the Common Good, he is also a contributor to the books, Faith Goes to Work: Reflections from the Marketplace, and Get Up Off Your Knees: Preaching the U2 Catalogue. He lives with his wife Meg in Virginia
Steven Yedinak Interview
No full textLTC (RET) Steven M. Yedinak commissioned in the U. S. Army Infantry in 1963 and subsequently spent 26 years in Special Forces and Airborne Infantry. He served two combat tours in Vietnam (1966-67 & 1971-1972), and started the Mobile Guerrilla Force. He is the author of Hard to Forget: An American with the Mobile Guerrilla Force in Vietnam (Random House, 1998). He retired from the Army in 1989
Gamification is broken. An interview with Steven Poole
No full textSteven Poole is the author of Trigger Happy (2000. New York, NY: Arcade Publish), Unspeak (2006. New York, NY: Grove Press), and You Aren’t What You Eat (2012. In press). He has written extensively on books, culture, and videogames for The Guardian and other publications
Steven Pinker on language and thought
No full textEducação Superior::Linguística, Letras e Artes::LinguísticaThis video presents an exclusive preview of Steven Pinker's book: the stuff of thought. The author looks at language and how it expresses what goes on in our minds and how the words we choose communicate much more than we realize. For Steven Pinker, the brilliance of the mind lies in the way it uses just two processes to turn the finite building blocks of our language into infinite meanings. The first is metaphor: we take a concrete idea and use it as a stand-in for abstract thoughts. The second is combination: we combine ideas according to rules, like the syntactic rules of language, to create new thoughts out of old one
Steven Pinker on language and thought
No full textEducação Superior::Linguística, Letras e Artes::LinguísticaThis video presents an exclusive preview of Steven Pinker's book: the stuff of thought. The author looks at language and how it expresses what goes on in our minds and how the words we choose communicate much more than we realize. For Steven Pinker, the brilliance of the mind lies in the way it uses just two processes to turn the finite building blocks of our language into infinite meanings. The first is metaphor: we take a concrete idea and use it as a stand-in for abstract thoughts. The second is combination: we combine ideas according to rules, like the syntactic rules of language, to create new thoughts out of old one
Steven Pinker on language and thought
No full textEducação Superior::Linguística, Letras e Artes::LinguísticaThis video presents an exclusive preview of Steven Pinker's book: the stuff of thought. The author looks at language and how it expresses what goes on in our minds and how the words we choose communicate much more than we realize. For Steven Pinker, the brilliance of the mind lies in the way it uses just two processes to turn the finite building blocks of our language into infinite meanings. The first is metaphor: we take a concrete idea and use it as a stand-in for abstract thoughts. The second is combination: we combine ideas according to rules, like the syntactic rules of language, to create new thoughts out of old one
Steven Pinker on language and thought
No full textEducação Superior::Linguística, Letras e Artes::LinguísticaThis video presents an exclusive preview of Steven Pinker's book: the stuff of thought. The author looks at language and how it expresses what goes on in our minds and how the words we choose communicate much more than we realize. For Steven Pinker, the brilliance of the mind lies in the way it uses just two processes to turn the finite building blocks of our language into infinite meanings. The first is metaphor: we take a concrete idea and use it as a stand-in for abstract thoughts. The second is combination: we combine ideas according to rules, like the syntactic rules of language, to create new thoughts out of old one
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