Justification of Repair of the Open Conducting Network According to the Duration of Flood of the Ameliorated Agricultural Lands

Abstract

The technique for construction of the typical hydrographs of the spring and rain floods has been presented. The effect of the tested conveyance on the duration of the flood and impoundment of the agricultural lands, delay of performing the spring field works, harvesting conditions, terms of sawing the winter crops, etc. that conditions the damages to the agricultural production are determined by the hydrological calculations. The conveyance is determined by the ordinary methods of hydraulics. It is recommended to determine the characteristics of the water regime causing the damages according to the design hydrographs constructed according to the watercourse analogues of regional belonging with long-term periods of observations after performing the ameliorative construction. Such an approach makes it possible to take into account the local conditions to the maximum extent and refuse the sophisticated calculations of the nonstationary waterflow in canals.