5. Os riscos naturais e ambientais.
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Transcript of 5. Os riscos naturais e ambientais.
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Sociedade e contorno natural1
1. Prehistoria e Idade Antiga. Unha paisaxe modelada polas forzas naturais daba espacio á crecente diversificación das actividades que iniciaba o home.
2. Nas aldeas medievais e modernas, os campos e camiños comenzan a esculpir unha nova paisaxe
3. A industria fai a súa a-parición no s. XIX e o medionatural resíntese do seu e-fecto rapidamente.
4. O desenvolvemento das cidades actuais demanda to-do e agora do medio no que se asentan. Producindo gran-des transformacións no con-torno.
A transformación do espacio xeográfico
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Residuos urbanos 3
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Contaminación atmosférica 4
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Verquidos 5
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Sobreexplotación de recursos6
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Contaminación acústica 7
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Riscos naturais. Tipos 8
Esfera da terra Riscos ambientaisLitosfera. Sismos
VulcanismoAluviónsEscorregamentos
Atmosfera. Ventos fortesOndas de frío.Temporais de neve
Biosfera. IncendiosPlagasepidemias
Hidrosfera. InundaciónsSecasAludes
Tipos de riscos naturais
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Inundacións 9
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As oscilacións do Jet Stream10
Formación dunha gota fría
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Terreos potencialmente inundables11
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Riscos naturais de orixe meteorolóxica: A seca12
Mapa de % de precipitación sobre o normal. 2005
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Encoro en niveis mínimos 13
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Cauce seco dun río. 14
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Oscilación de precipitacións en España.15
A seca: un fenómeno cíclico na Península
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Temporal de vento 16
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Temperaturas e ventos o 16-II-2006 (80 km/h)17
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Os efectos do vento en terra18
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Mapa de isotermas. 18-II-198719
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Os efectos do frío sobre os cultivos20
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Efectos dos temporais de neve21
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Efectos dos temporais de neve22
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efectos da neve nas poboacións.23
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A xeración da sismicidade. 24
Límites e movementos das placas tectónicas
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Mapa da sismicidade potencial da Península Ibérica25
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Efectos dun terremoto en España26
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Riscos naturais de orixe xeolóxica27
•
Mapa da actividade sísmica do NO penínsular
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Erupción do volcán Teneguía. Illa da Palma (Canarias) 197128
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Diversos tipos de escorregamentos e desprendementos29
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Gran escorregamento de terras30
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Problemas ambientais: degradación da vexetación.31
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Problemas ambientais: a deforestación.32
Deforestaciónproducida pola
roturación
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A deforestación: incendios 33
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Problemas ambientais: a erosión.35
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Problemas ambientais: a desertificación.36
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Problemas ambientais: a desertificación.37
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Problemas ambientais: a contaminación atmosférica.38
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Problemas ambientais: gases contaminantes da atmósfera.39
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Problemas ambientais: o efecto "illa de calor"40
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Problemas ambientais: a chuvia ácida.41
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Problemas ambientais: o efecto invernadoiro.42
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Problemas ambientais: a contaminación dos solos.43
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Problemas ambientais: a contaminación das augas44
InsecticidasFert i l izantes
Augas residuais
Verquidos industriais
Acuífero subterráneo
Agricultura Cidade Industria
Pozo
Axentes contaminantes das augas
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Problemas ambientais: contaminación do mar.45
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Problemas ambientais: contaminación das augas fluviais.46
Río
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Problemas ambientais: reciclado de resíduos.47
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Problemas ambientais: incineración de resíduos.48
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Problemas ambientais: materias primas da compostaxe.49
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Preservación do medio: Parques Nacionais.50
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Preservación do medio: reservas da biosfera.51
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Preservación do medio: reservas da biosfera52