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Anthropogenic changes of water conditions...
In 1506 a contract was signed for the building of a water supply system in Lublin (Szczygieł 1986). For this purpose the Bystrzyca river bed was destroyed in Wrotków and a part of the water was directed into a canal about 4 km (Łoś 1986). This water was utilized to set going an appliance called ’rurmus’ which pumped spring-water, conveying it from Wrotków through wooden pipes to a water-tower. After reaching a height of about 25 m it was distributed in the city. The discharge is estimated at 4-5 m3/h.
Fig. 2. Spatial development of Lublin from the 16th c.
1 — rivers, water reservoirs (according to the present state), 2 — liąuidated mili dams,
3 — covered river bed, 4 — city boundaries in 1317, 5 — in 1875, 6 — in 1931, 7 — in 1992
At the beginning of the 16th c., Lublin had about 3000 inhabitants, Thus the diurnal water consumption was about 30 1/person (Mazurek 1986). These waterworks were functioning till the middle of the 17th c.
The damming-up facilities, canals conveying water and ponds, changed the character of the valley bottoms, generally increasing top water resources. It can be concluded that after the building of a number of such facilities
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