More intense urban and agricultural land uses have gone along with the occlusion of road-ditches and field-ditches, or their substitution with pipes. The water system networks of the past have often been demolished or modified by numerous small-scale (and often illegal) local actions (Rusconi, 1991 and Regione Veneto, 2007). One of the major consequences of these changes is the more frequent flooding

of the artificial reclamation networks, in particular ditches and canals, after small but intense rainfall events (D’Alpaos, 2006). In 2010, after several days of intense rain (500 mm in 48 h) (Barbi et al., 2007) the drainage system of the region failed, and several rivers overflowed, producing a flood (Fig. 1a and b) that hit about 130 municipalities, and caused damages click here to 500,000 people (Structure of the Extraordinary Commission for Recovering from the Flooding, 2011). More recently, in 2012 (Fig. 2c and d), 2013 (Fig. 2e and f) and again in the early 2014 (Fig. 2g and h)

the Veneto drainage network came under criticism in different locations. The present http://www.selleckchem.com/products/Bafilomycin-A1.html study, considering this background context, focus mainly on the analysis of the network Drainage Density (the ratio of the total network length to the area under analysis), and the network Storage Capacity (the volume of water in m3/ha that can be stored inside the channels). Drainage/reclamation service criteria, in fact, determine the requirements for the design of drainage channels and pumping stations (Malano and Hofwegen, 1999 and Cazorzi

et al., 2013). In the Veneto floodplain, the water in the drainage network is mechanically drained, therefore the analysis of these two parameters is critical, expecially considering that the flooding hazard can be exhacerbated simply by the interruption of the pumping services (Adige-Euganeo Land Reclamation Consortium, 2011). Storage of water is, moreover, the key principle at the basis of any water management nearly strategy, and scientific and engineering researches, and practical manuals have routinely underlined the provisioning of storage volumes, even when temporary and within the network, as a measure to mitigate the effects of land-use changes on flood discharge (i.e. Hough, 1984, Hall et al., 1993, Wheater and Evans, 2009, Crooks et al., 2000 and D.G.R. 1322/2006, 2006). The study area is a small area mechanically drained, about 2.7 km2 wide, located in the southern part of the province of Padova (Veneto, Italy) (Fig. 3). The southern province of Padova was one of the most involved during the 2010 flood, with about 190 M€ of damages, and as a matter of fact, for a profitable land use and planning, it requires a correct management of the artificial drainage system (Piani Territoriali di Coordinamento Provinciale, 2009).