Urban water management in Lodz is challenged by its specific hydrological situation determined by geographical setting. Although located in the plain district of the country, the city itself lays in a relatively steep area (ranging between 180 to 235 m above sea level within the city) and is divided into 18 catchments drained by streams with average flows of <1m3 s1 (see Figure 9.8 and Figure 9.9).