31. These waters constitute a vital hydrological supplement for the Mediterranean. 32. The Valley is still in a major hydrological drought, 33. The first hydrological power plant in Iceland was built in Hafnarfj�r�ur in 1904. 34. One could still hardly speak of dense topographic, orographic and hydrological information. 35. The hydrological features at this site are most unusual. 36. The hydrological parameters of the Sutla are regularly monitored in Croatia at Zelenjak. 37. The hydrological network of the town is composed of main rivers and tributaries. 38. He was also the founder of the Geographico-hydrological School of Oceanography. 39. The six distinct lagoons can be defined by their topographic and hydrological characteristics. 40. The geographical extent of the regions is based on their respective hydrological properties.