Methods and Tools for Drought Analysis and Management by I. Bordi, A. Sutera (auth.), Giuseppe Rossi, Teodoro Vega,

By I. Bordi, A. Sutera (auth.), Giuseppe Rossi, Teodoro Vega, Brunella Bonaccorso (eds.)

Implementation of powerful drought administration guidelines calls for either complex applied sciences and acceptable tools. tracking and forecasting platforms, useful instruments for probability review, in addition to uncomplicated and aim standards to choose and enforce applicable drought mitigation measures are key components for a profitable drought administration strategy.

These key concerns were tackled by way of universities and public companies curious about the european initiatives Sedemed and Sedemed II (Programme Interreg IIIB MEDOCC), aimed toward the definition of an built-in community for actual time tracking of drought, the improvement of universal methodologies for drought research and forecasting, in addition to the definition of right mitigation thoughts for the Mediterranean international locations.

The ebook offers the most results of such tasks with a distinct specialise in: drought tracking and forecasting ideas at diversified spatial scales; new or transformed agrometeorological indices and distant sensing strategy for drought identity and characterization; instruments to enhance floor water assets administration less than drought stipulations; tools and instruments for groundwater assets tracking and administration, in accordance with hydrogeological and hydrodynamics features of aquifers; common standards to choose and enforce mitigation thoughts to avoid or reduce drought affects.

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Sample text

In order to illustrate the phenomenology of large-scale atmospheric conditions associated to dry/wet extremes in Sicily we consider the 500hPa geopotential height extracted from the NCEP/NCAR data set. To quantify wet and dry conditions the SPI is applied. We limit the study to the SPI on 1-month time scale because the correlation introduced by longer time scales is an unwished property for applying standard extreme value technique. The analysis of extremes is usually based on the estimation of extreme event return times.

For example, Figure 2 describes a typical situation of European Blocking that, in this case, lasted through June and July 2006. The promontory of the high pressure system remains over the central Mediterranean basin. There has been no significant precipitation and the temperature has exceeded 35 degrees in many areas. This situation is favorable to a continued absence of precipitation leading to a deepening in drought conditions. Figure 3 illustrates the SPI drought index for the month of July 2006 over Emilia-Romagna as the consequence of the blocked pattern situation.

This leads to 13 extreme events for wet and dry conditions. Then, for each of the 13 cases, the geopotential anomaly map is computed (that is, we consider the difference between the geopotential field for the month with extreme SPI-1 and the long-term mean for that month). The anomalies associated to few extreme cases are displayed as an example in Figure 12a-c. 1). As can be seen by the figure, these Figure 11. 7: extreme wet (left) and extreme dry (right). Units are years DROUGHT MONITORING AND FORECASTING AT LARGE SCALE 23 Figure 12.

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