Abstract
This paper presents the results of the investigations, driven by different techniques, including environmental tracers and geophysical methods, in the aim of better understand the causes of the current salt-water intrusion in the Pontina Plain, in the south of the Lazio Region (Italy). In the last 50 years many investigation campaigns have been carried out to evaluate the evolution of salt-water intrusion. This is an area with a strong man-made residential and tourist impact and, in the some cases, it is characterized by intensive agricultural practices. Therefore, it can be affected not only by salt-water intrusion, but by the salinization of its groundwater also due to other factors. All these factors have led the Pontina Plain to a groundwater situation which makes the groundwater resource management and the planning of their future exploitation very difficult.
Highlights
The test site is the southern coastal plain of the Lazio Region
This paper presents the results of the investigations, driven by different techniques, including environmental tracers and geophysical methods, in the aim of better understand the causes of the current salt-water intrusion in the Pontina Plain, in the south of the Lazio Region (Italy)
In the last fifty years, when the wetland was turned into a plain, many man-made activities started operating such as industrial firms and farms producing most of the fruits and vegetables consumed in the central regions of Italy
Summary
The test site is the southern coastal plain of the Lazio Region (central Italy) It is an area of about 80 km, most of which has been characterized by coastland and wetland since the beginning of the previous century. The total crop water requirement is about 20 × 106 m3/a, mostly from groundwater; and the area is nowadays crossed by two main systems of irrigation channels in order to increase such yields. Thanks to the favourable climatic conditions and to the availability of irrigation water, these products generate high profits They significantly increase the total water consumption per year and require nitrate fertilization of the soil
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