Open AccessEffectiveness of drainage of agricultural land by closed drainage in climatic conditions of the Novgorod Region
Author(s) -
O V Balun
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/613/1/012011
Subject(s) - drainage , arable land , topsoil , groundwater , hydrology (agriculture) , environmental science , watertable control , loam , tile drainage , drainage system (geomorphology) , trench , well drainage , geology , water table , soil science , soil water , agriculture , geotechnical engineering , geography , ecology , chemistry , archaeology , organic chemistry , layer (electronics) , biology
The objects of this study are closed drainage systems having a hydraulic connection of arable horizon with a drainage pipe. Experimental plots are located in the Novgorod region on sod-podzolic loamy soil. In the experiment we used such kinds of design as a standard construction with filling the drainage trench with sand-gravel mixture to the arable horizon, and a construction in the form of two-tiered drainage. The distance between drains is 14 m, the depth is 1.1 m. The design of two-tiered drainage provides for the upper tier of cavity-free drains with a depth of 0.5 m, a distance between the drains 6 m, located perpendicular to the lower tier. As a result of the study of dynamics of groundwater and soil humidification, we found out that in the experimental systems of two-tiered drainage in excessively wet years, groundwater had not risen into the topsoil during the entire growing period. Formation of groundwater after heavy rainfall was more intensive in the two-tiered drainage systems. The most favorable water-air regime in the years with different precipitation conditions (both in dry and abnormally wet years) was provided by the experimental two-tiered drainage systems with a smaller amplitude of fluctuations in moisture reserves in a soil arable layer which allowed us to conclude that draining of collectors was more effective on the base of the two-tiered drainage.