Search results for "Water"

Le nymphai e l’acqua in Sicilia: contesti rituali e morfologia dei votivi

2012

L'articolo analizza la fenomenologia (contesti, votivi, iconografie) dei culti relativi all'acqua e al nymphai in Sicilia The paper analyzes the phenomenology (contexts, votives, iconographies) of the cults relating to water and nymphai in Sicily

Assessing priority of intervention on water distribution networks with reduced information

2008

Real-time optimal control of water distribution systems - Models and techniques, including intermittent supply conditions.

2014

Optimal Network Design with the Use of Reliability Constraints and Simulated Annealing Tecnique

1996

Water quality analysis in network and private storage tanks in intermittent distribution systems

2012

In countries suffering from chronic water shortages, water distribution systems are often operated on an intermittent basis. As a consequence, the network is involved by cyclical filling and emptying periods causing water quality degradation. During the emptying period, the distribution system is unpressurised and it may occur that pollutants move into the network. Moreover, the stagnation period can promote microbial growth. For this reason water is usually heavily chlorinated in order to maintain it potable. Due to intermittent water service users acquire private tanks, which are used for collecting water during serviced periods and distributing it when public service is not available. Th…

Estimation of chlorine residual in a drinking water distribution system.

2006

Alternative analysis of transient infiltration experiment to estimate soil water repellency

2019

The repellency index (RI) defined as the adjusted ratio between soil‐ethanol, Se, and soil‐water, Sw, sorptivities estimated from minidisk infiltrometer experiments has been used instead of the widely used water drop penetration time and molarity of ethanol drop tests to assess soil water repellency. However, sorptivity calculated by the usual early‐time infiltration equation may be overestimated as the effects of gravity and lateral capillary are neglected. With the aim to establish the best applicative procedure to assess RI, different approaches to estimate Se and Sw were compared that make use of both the early‐time infiltration equation (namely, the 1 min, S1, and the short‐time linear…

Monitoring of erosion on two calanchi fronts – Northern Sicily (Italy)

2011

In the present research, two neighbouring calanchi fronts have been monitored by means of repeated readings on erosion pins, that were carried out between November 2006 and October 2008. During the monitoring period, a gauge station has been recording rainfalls, allowing us to compute the Rainfall-Runoff Erosivity Factor of the USLE model. The research highlighted: i) a general correspondence between rainfalls temporal trends and surface variation rhythms; ii) alternating erosion and deposition phases result in a retreat of the “calanchi” fronts.

Geochemical characterization of trace elements in thermomineral waters of Greece

2020

Trace elements have a fundamental role in natural and anthropogenic systems. In waters, they present a great variability of concentrations that mostly depends on the degree of gaswaterrock interactions and geochemical conditions such as pH, temperature, redox and/or exchange reactions, etc. Even though, they are present in very low contents in hostrocks, elevated concentrations in ground or surface waters may have a hazardous impact on human and animal health and thus, it is important to both quantify and try to understand their behaviour in natural systems. Here we present the results of about 300 cold and thermal mineral waters collected along the entire Hellenic territory. Physicochemica…

Gestions de l'eau et du développement urbain dans l'espace dijonnais :quels modes d'intégration territoriale ?

2006

Urban growth, jointed to technical networks, contributes to human pressure on water resources. In the meantime, the water French policy put management of urban development in accordance with catchments and hydrologic dynamics; that makes districts and intermunicipal groupings adopt new areas and action systems. The urban area of Dijon is located in three catchments and above a wide groundwater. This case shows urban water management gives greater place to precariousness and common character of water resources, even if institutional responses mainly concern town planning regulation.