HOW PROTECTIVE AND FILTER MATE-RIALS AFFECT CLOSED DRAINAGE NETWORK ON PEAT SOILS
The article shows how closed drainage system works being equipped with protective and filter materials, reclamation facility is placed on peat soils of central part of Belarus. The analysis of features shows that drains enhanced by near-wall filter of patent BY 15513 have maximum module of drainage flow, what should be taken into account in design of close drainage, particularly in complex hydro geological conditions. Among protective and filter materials the most suitable for peat soil drainage are Typar® SF32*,Typar® SF27*, Gronema I-150-S, PINEMA T-150*, PINEMA T-150.Drainage runoff, soil moisture, groundwater levels indicate the work of drainage filters.