Keywords:  water regime, deep loosening, filtration coefficient, mole drainage, drainage system, reconstruction, groundwater level

 Мелиорация.– 2024. – №3 (109). – P 25–31

The article presents an overview of the reasons for the deterioration in the efficiency of drainage melioration in various natural conditions in the Republic and abroad. The conditions under which the intensity of the melioration systems decreases (in particular, the filtration coefficient in the subsoil layer decreases as a result of long-term operation of melioration systems are indicated) and a such rarely analyzed reason as soil degradation, i. e. its destructuring, depending on a number of factors, are given. The differentiation of drainage systems by factors of performance and degree of drainage is given. The measures for creating the required water regime of soils, capable of improving the drainage effect of drainage at reconstruction sites, are recommended.