Answer to Question #141478 in Physical geography for hania

Question

how perrenial canals may create problem to farm land?

Answer 1

Perrenial canals are canals that originate in perrenial rivers (rivers with constant flow within a year) while some construction is going (a dam, road, and so on). Therefore, such canals carry construction waste and dirt to the fields and plants. Moreover, a lot of mosquitoes settle in such canals.