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Trends in intense precipitations in Friuli Venezia Giulia (NE Italy)
No full textChanges in the intensity and frequency of precipitations are likely to affect the hydrologic
cycle much more than changes in the mean climate. In this work, the hypothesis that long
term series of short duration maximum annual rainfall are stationary has been evaluated.
Values of annual maximum of 1, 3, 6, 12, 24 hours precipitations from 21 weather stations in
Friuli Venezia Giulia region were collected for the period 1922‐2009; trend analysis on raw
data series was performed using linear regression and Mann‐Kendall test. For each duration
and location series, EV‐I distribution was used to calculate the critical values (quantiles) of
precipitation according to return periods of 2, 20, and 100 years on moving windows of 20
years including at least 15 useful values; on these data, trend analysis was performed using
linear regression and break points were searched using the Pettitt test.
Linear regression and Mann‐Kendall test performed on raw data suggested that in most
cases the maximum value of short‐duration rainfall increased along time; however, the trend
was only seldom statistically significant.
On the contrary, regression of 1, 3, 6, and 12 hours precipitations quantiles computed for all
return periods showed a significant increase with time, while the opposite was observed for
24h quantiles. Break points were detected in most series, with differences between periods
up to 50%.
The results indicate that trends of intense rainfall are not univocally defined, therefore
suggesting that data for hydrological design must be carefully selected
I Giardini Camerini
No full textI Giardini Camerini a Piazzola sul Brenta, sottoposti a vincolo paesaggistico, sono un frammento ritagliato e sospeso tra la monumentalità post-palladiana di Villa Contarini, l’archeologia industriale e l’ingegneria idraulica, testimonianza
dell’industrializzazione tessile ottocentesca del luogo. Il progetto di riqualificazione di CZstudio li restituisce al paesaggio contemporaneo, riscoprendoli, senza rinunciare a un processo di trasformazione che include il riciclo delle figure e dei materiali esistenti.----The Camerini Gardens in Piazzola sul Brenta, protected by environmental restrictions as part of the historic post-Palladian monument Villa Contarini, lie between the villa itself and left-over industrial archeology and hydraulic engineering from the area’s nineteenth century textile industry. The restoration project by CZstudio,
inviting visitors to rediscover the gardens, incorporates original elements and existing materials, integrating the site with today’s contemporary landscape
La risorsa alimentare globale e la capacità della scienza di superare i limiti attuali: Malthus ha ancora torto?
No full textMore than two centuries ago, T.R. Malthus postulated the human
reproductive capacity being higher than the earth’s feeding capacity.
As last decades’ population growth proved Malthus theory wrong,
experts agree that this can be attributed to the application of technology
in agriculture, leading to a significant enhancement of unit yields
(first green revolution). However, heavy social and environmental
costs were paid to reach such stunning achievements; moreover, they
have seemingly gained a steady level, owing to increasing pressure of
several limiting factors (e.g., soils, water, and nutrients availability;
global change, etc.). Malthus prediction is therefore still relevant when
trying to match population growth and food availability: the time
seems ripe to launch a second green revolution, focused on lowimpact,
easily accessible technologies
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