The Po is the longest river in Italy. It rises in the Cottian Alps and travels a course of about 405 miles (652 kilometers) before flowing into the Adriatic Sea.

Physical features

Rising on the slopes of Monte Viso near the French border, the Po River begins its eastward journey as a turbulent mountain stream. It falls quite steeply for its first 22 miles (35 kilometers). After that it evens out. In the middle and lower parts of its course, the Po makes several meandering curves, which have left behind many oxbows, or circular lakes. The river forms part of the boundary between the regions of Lombardy and Veneto and Emilia-Romagna before it arrives at the Adriatic. The major tributaries of the Po include the Dora Baltea and the Sesia.

Economy

The waters of the Po River have been used extensively for irrigation, especially in the lower part of the course. The river forms a lowland plain of rich soil that has a climate favorable to farming. This plain is the widest and most fertile in the country. The products grown in the area feed a large part of the Italian population.

Environmental issues

The Po River has often caused many disastrous floods. Several efforts have been made to reduce the danger of such floods. The first attempts to regulate the flow of the river were made thousands of years ago before the period of the Roman Empire. Those projects were later abandoned, but efforts to contain the river were resumed in the Middle Ages. In more recent years dikes have been built to control the river's waters, and canals have been constructed to divert silt.