Geoscience Reference
In-Depth Information
The quality of stormwater from industrial areas is highly dependent upon the
type of industry and the conditions at the specific site. The variety of contaminants
(some of which can be related to atmospheric deposition) is large and its
concentrations can be very high. Whereas in areas of light industry stormwater quality
may be similar to that in commercial areas, in dense, heavy-industrial areas, storm-
water can be highly polluted with heavy metals and organic compounds (Mikkelsen
et al.
1994
). Residential areas usually produce high-quality stormwater (Remmler and
Hutter
1997
). However some contaminants, including detergents, plant-related
nutritional materials and fertilizers, herbicides and insecticides, often characterize
it (Pitt et al.
1999
).
5.2 Materials and Methods
5.2.1 Research Area
The area chosen for the research is located in the urban areas of Herzliya and
Ra'anana in the southern Sharon region located in the coastal plain of Israel
(Fig.
5.1
). The study sites contains number of urban basins with various land uses
(e.g. residential areas, industrial areas and major roads), as well variable sizes
ranging from (0.2 to 4.4 km
2
). The soil in the area is loam, sandstone and sand;
the topography is generally gentle, with a number of sandstone ridges. We have
Fig. 5.1 Drainage basins and sampling stations in the Herzliya and Ra'anana area
