438
R. Graf and K. Pyszny
3.0 dm
3 s
−1 km
−2 for the catchment areas of its tributaries, with the average unitary
run-off for Poland totalling q = 5.5 dm
3 s
−1 km
−2 [41]. In the main, the disposable resources of the region are groundwaters from the quaternary stage (69%),
while 18% are resources from older stages [46]. The metropolitan Pozna´ n Water
Supply System functions within the boundaries of the metropolis. Its hydrogeological bases are determined first and foremost by groundwater resources, which have
been duly identified and documented: the Wielkopolska Fossil Valley (Main Reservoir of Groundwaters, GZWP no. 144), the Warsaw-Berlin Glacial Valley (GZWP
no. 150), and the Warta Gorge Valley, which constitute the main source of water
supply for the Pozna´ n metropolis [46, 47]. In the Pozna´ n Catchment Area of the
River Warta the degree of utilisation of groundwater resources available for development (source: PIG-PIB), which specifies the relation between current groundwater
consumption and their resource, is low (15–30%) and very low (under 15%) for the
remaining balance units: the River Warta from Obrzycko to the River Note´ c (XII)
and the River Obra (XIII). Groundwater resources are important both strategically
and in terms of usage as regards the provisioning of the Pozna´ n metropolis with
water.
18.4.3 Water Resources Management
18.4.3.1 The Security and Reliability of the Pozna ´
n
Water Supply System
Within the Pozna´ n metropolis, there is observed the mutual overlapping of
metropolitan functions: housing (compact and dispersed development), economic
(water intake points, sewage systems, sewage treatment plants) and environmental
(forms of nature protection). Water resources are coming under increasing pressure,
and this increases the risk of disruption of the equilibrium of the hydrological balance.
In consequence, there exists the potential threat of a deficit of water resources available for development arising in the event that the consumption of groundwaters is
exceeded in relation to the size of this resource, and also as the result of planned
investments in intermediate protection zones and water-bearing lands earmarked
for the development of intake points. Priority in this regard has been given to the
Mosina-Krajkowo water intake point, which is the leading supplier of the Pozna´ n
Water Supply System (Fig. 18.7), and also utilises intake points and water treatment plants located in Pozna´ n (D˛ ebina water intake point), Gruszczyn (commune
of Swarz˛ edz), Murowana Go´ slina, and in the communes of Kórnik and Suchy Las.
Together, the Pozna´ n Water Supply System and the Pozna´ n Sewage System constitute
fundamental elements of a water and sewage infrastructure that is metropolitan in
nature, with its largest operator being the water supply and sewage company Aquanet
S.A.; remaining networks are primarily local in nature [48].
To date, the quantitative and qualitative protection of water resources at the most
important water intake point, i.e. Mosina-Krajkowo, was implemented through the
R. Graf and K. Pyszny
3.0 dm
3 s
−1 km
−2 for the catchment areas of its tributaries, with the average unitary
run-off for Poland totalling q = 5.5 dm
3 s
−1 km
−2 [41]. In the main, the disposable resources of the region are groundwaters from the quaternary stage (69%),
while 18% are resources from older stages [46]. The metropolitan Pozna´ n Water
Supply System functions within the boundaries of the metropolis. Its hydrogeological bases are determined first and foremost by groundwater resources, which have
been duly identified and documented: the Wielkopolska Fossil Valley (Main Reservoir of Groundwaters, GZWP no. 144), the Warsaw-Berlin Glacial Valley (GZWP
no. 150), and the Warta Gorge Valley, which constitute the main source of water
supply for the Pozna´ n metropolis [46, 47]. In the Pozna´ n Catchment Area of the
River Warta the degree of utilisation of groundwater resources available for development (source: PIG-PIB), which specifies the relation between current groundwater
consumption and their resource, is low (15–30%) and very low (under 15%) for the
remaining balance units: the River Warta from Obrzycko to the River Note´ c (XII)
and the River Obra (XIII). Groundwater resources are important both strategically
and in terms of usage as regards the provisioning of the Pozna´ n metropolis with
water.
18.4.3 Water Resources Management
18.4.3.1 The Security and Reliability of the Pozna ´
n
Water Supply System
Within the Pozna´ n metropolis, there is observed the mutual overlapping of
metropolitan functions: housing (compact and dispersed development), economic
(water intake points, sewage systems, sewage treatment plants) and environmental
(forms of nature protection). Water resources are coming under increasing pressure,
and this increases the risk of disruption of the equilibrium of the hydrological balance.
In consequence, there exists the potential threat of a deficit of water resources available for development arising in the event that the consumption of groundwaters is
exceeded in relation to the size of this resource, and also as the result of planned
investments in intermediate protection zones and water-bearing lands earmarked
for the development of intake points. Priority in this regard has been given to the
Mosina-Krajkowo water intake point, which is the leading supplier of the Pozna´ n
Water Supply System (Fig. 18.7), and also utilises intake points and water treatment plants located in Pozna´ n (D˛ ebina water intake point), Gruszczyn (commune
of Swarz˛ edz), Murowana Go´ slina, and in the communes of Kórnik and Suchy Las.
Together, the Pozna´ n Water Supply System and the Pozna´ n Sewage System constitute
fundamental elements of a water and sewage infrastructure that is metropolitan in
nature, with its largest operator being the water supply and sewage company Aquanet
S.A.; remaining networks are primarily local in nature [48].
To date, the quantitative and qualitative protection of water resources at the most
important water intake point, i.e. Mosina-Krajkowo, was implemented through the