Keywords: horizontal drainage, soil, filtration coefficient, trench backfill, arable layer.

// Мелиорация.– 2022. – №2(100) – P 15–19

The article considers the experience of studying the drainage capacity of drainage on poorly permeable mineral soils according to the data of domestic and foreign scientists. The natural conditions of the studied objects and the applied drainage designs are characterized. The main reasons for the unsatisfactory operation of drainage and the factors causing them are noted. The most effective measures and constructive solutions for drainage systems are given, which increase their performance in difficult natural conditions on heavy soils. It is recommended to use this research experience in the development of drainage structures, taking into account changing natural conditions, using modern, more technological construction methods and new materialsl.