On these hill-sides begins the “birth” of thermal water. 3.2.2. Rivers

From north to south along mountain range Považský Inovec flows river Váh. It is regulated ad touches the spa and city part of Piešťany. Along the river-bed of Váh is built drainage canal (Biskupický canal), which flows from water power-stations in Nové Mesto nad Váhom and Horná Streda. Near bridge which leads to the spa part of Piešťany, the drainage canal joins the main stream of Váh. Parallel with Váh, from village Čachtice flows river Dudváh, which catches and gains water from streams flowing from northern part of complex of mountains Malé Karpaty. Between Váh and Dudváh flows from Čachtice, through west part of city Piešťany, stream Dubová, which then runs into the water basin Sĺňava. Sĺňava is water basin, which spreads from half of Piešťany to village Drahovce and it’s long 6,4 km (area is 430 ha.)

Above village Moravany nad Váhom is built water basin Striebornica. Not far away from Piešťany, near village Vrbové on the stream Holeška, was built up water dam, which caused formation of water basin Čerenec – nice place for water sports and fishing. 3.2.3. Climate

Piešťany belong into the most warm parts of Slovak republic. The climate here is typical for basins, slightly dry, slightly windy. Mountains on the east and northwest are eliminating the strength of colder autumn and winter winds. On the other hand, the opened area to south provides warm southern flow of wind. The annual temperature 9,4°C is relatively high (January/-2,2°C, July/19,7°C.) The number of tropical days when temperature exceeds 30°C is in average 13, the number of summer days when temperature exceeds 25°C is in average 62. Number of days, when is the temperature about 0°C, is about 107 per year, and number of days when it is under 0°C is only 28. The cloud cover in Piešťany is very rare and therefore is here high amount of sunny days. The annual average of sunshine in Piešťany is 2147 hours, number of sunny days is above 200 per year. Related to the cloud cover, the precipitation is 611 mm in average per year, and it corresponds with the height above the sea level of the city. The fall of snow is about 20 cm per year and the snow-cover, 13 cm high, lasts in average 40 days during the year. The weather in spring is pleasant, summer is dry and warm, autumn is temperate and winter moist and temperate cold. 3.2.4.