However, these data are generally considered only as an indicator of an adequate well purging. Before groundwater sampling, well water level values are measured during low-flow purging to check the correct driving of the activity. Hydrogeological characterization is required when investigating contaminated sites, and hydraulic conductivity is an important parameter that needs to be estimated. The model estimates, for any discharge value, the percentage of the topographic ar. As δ18O and δ2H values of groundwater samples are natural tracers of the recharge area’s elevation, we propose a model, based on the distribution of the basin surfaces involved as recharge areas, in relation to elevations. Oxygen-18 and deuterium isotope composition of Capodacqua di Spigno Spring, in the South of the Latium Region, has been applied with rainfall and discharge values related to the feeding aquifer of this spring. Regarding this topic, this paper presents an approach aimed at identifying karst aquifer recharge areas by the application of oxygen-18 and deuterium isotopes composition of groundwater coupled with hydrological features. On the other hand, their identification is very important in the aim of protecting the groundwater resources that these aquifers host. Karst aquifer recharge areas are usually difficult to identify because of the complexity of these aquifers’ characteristics. Due to the lack of flow rate data of springs in many. In this area important water resources are present, but even here in the last decades they are affected by groundwater depletion as a consequence of occurring drought events, the upward trend in the global average temperature and the increase in groundwater extraction. Most groundwater in the South-East Latium Region, Central Italy, as in the whole Apennine Mountains chain, is stored in karst aquifers. In this frame, to ensure temporal water availability in water-stressed areas, sustainable groundwater management is an increasing challenge. Dry years and extreme temperatures are common drivers of current climate impacts all over the world, including, for example, the freshwater supply for drinking and agriculture purposes, ecosystems, forestry, health, etc. The increasing occurrence of widespread drought phenomena is a global environmental emergency, especially for the effects of ongoing climate change on groundwater availability.
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