IRRIGATION SYSTEM Russian patent published in 2001 - IPC

FIELD: agriculture. SUBSTANCE: irrigation system has water supply and water discharge channels, water intake sump with water level regulator, upper and lower stages of drains and drainage collector. Lower stage drain is laid under water supply channel and is connected to drainage collector which is connected via risers to water intake sump and upper stage drains. Return valves are positioned in collector outlet and inlet ends. Irrigation system is used for drainage and irrigation of agricultural lands. EFFECT: reduced construction and operational costs. 2 dwg