428
G. ¸
Serban et al.
12.4.3 Surface Water Resource and the Population Water
Requirements
By using different extensions and GIS tools and also the statistical data related to
surface runoff and population water requirements, at the end of the study we came up
with a composite structured map, which compares both “nature’s offer”, the surface
water resource, and the population water requirements.
In order to properly respect the calculus algorithm, we used the most reduced
hydrographic subbasins surfaces (up to 7 km
2 ) and also didn’t overlook the larger
basins of the collectors, which crowd together many human habitats and a large
number of inhabitants.
The result is very interesting and offers a quite enlightening spatial image
(Fig. 12.19).
The features of the drained layer Y (mm)—component no. 1 of the figure, are
already known from the previous chapters. Therefore we will proceed to the explanation of the spatial distribution of the water requirement values.
The second component of Fig. 12.19 confirms a diametrically opposed situation
to the first component: the areas with high values of the water requirements for
population are the corridors, the main collectors valleys and the plains from the
western part of the studied area, which are those most favorable to human habitats
and their economic and social activities.
The highest values go up to 43.6 mm in the basin areas related to urban agglomerations (Sighetu Marmat , iei) and 0 mm in the runoff formation zone—the mountain
area, uninhabited. All along the main courses of Vis , eu, Iza, Tur and some of their
vigorous tributaries, the values range from 10 to 30 mm.
By using the Raster Calculator tool, the difference between the two grids was performed, which enhanced exactly those areas of deficit, regarding the water resource
versus the water requirements for population (component 3 of Fig. 12.19). These
differences reach up to 17.1 mm near the state frontier with Hungary, where river
Tur leaves our country. We are certain that, if we had been calculated and mapped
the global water requirement of the studied area related to the groundwater supply,
the water deficit would have been further accentuated.
G. ¸
Serban et al.
12.4.3 Surface Water Resource and the Population Water
Requirements
By using different extensions and GIS tools and also the statistical data related to
surface runoff and population water requirements, at the end of the study we came up
with a composite structured map, which compares both “nature’s offer”, the surface
water resource, and the population water requirements.
In order to properly respect the calculus algorithm, we used the most reduced
hydrographic subbasins surfaces (up to 7 km
2 ) and also didn’t overlook the larger
basins of the collectors, which crowd together many human habitats and a large
number of inhabitants.
The result is very interesting and offers a quite enlightening spatial image
(Fig. 12.19).
The features of the drained layer Y (mm)—component no. 1 of the figure, are
already known from the previous chapters. Therefore we will proceed to the explanation of the spatial distribution of the water requirement values.
The second component of Fig. 12.19 confirms a diametrically opposed situation
to the first component: the areas with high values of the water requirements for
population are the corridors, the main collectors valleys and the plains from the
western part of the studied area, which are those most favorable to human habitats
and their economic and social activities.
The highest values go up to 43.6 mm in the basin areas related to urban agglomerations (Sighetu Marmat , iei) and 0 mm in the runoff formation zone—the mountain
area, uninhabited. All along the main courses of Vis , eu, Iza, Tur and some of their
vigorous tributaries, the values range from 10 to 30 mm.
By using the Raster Calculator tool, the difference between the two grids was performed, which enhanced exactly those areas of deficit, regarding the water resource
versus the water requirements for population (component 3 of Fig. 12.19). These
differences reach up to 17.1 mm near the state frontier with Hungary, where river
Tur leaves our country. We are certain that, if we had been calculated and mapped
the global water requirement of the studied area related to the groundwater supply,
the water deficit would have been further accentuated.