The assimilation ability of the elements of reclaimed agricultural landscapes for constructed wetland creation

Abstract

Purpose: substantiation and consideration of the assimilating ability of natural and artificially waterlogged areas within the reclaimed landscapes to support the decision to discharge drainage runoff onto the relief or to create constructed wetland. Materials and methods. The calculation of the hydraulic and anthropogenic impact on the wetlands within the reclamation system and constructed wetlands parameters, taking into account the assimilating capacity of wetlands, was performed using computer program in Excel. Results. The possibility of creating artificially waterlogged sites (bioplatos) within a reclamation system for the discharge and purification of drainage flow with subsequent discharge into the river network is considered. In order to take into account the assimilation capacity of wetlands (bioplatos) and the possibility of dumping contaminated drainage waters into them, the computer calculations were performed and graphs were constructed, the dependence of the bioplatos area on the assimilating ability of higher aquatic plants, as well as the total cost which is trends within 50–250 thousands rubles under given conditions of calculations are obtained. Conclusions. The obtained graphs showing the dependence between bioplato area and phosphorous assimilation allow us to determine the area and assimilating capacity of the bioplatos at drainage flow discharge containing phosphorous in the range from 0.5 to 10 l/s per 1 ha of the area of the structure with a drained area in the range of 200–800 ha, depending on the assimilating ability of higher aquatic plants at concentrations of nutrients of the nitrogen and phosphorus groups exceeding the MPC by 3 times in nitrogen and 60 times in phosphorus at different temperatures conditions.

Keywords

• assimilation capacity
• swamps
• constructed wetland
• reclamation system
• drainage flow
• anthropogenic impact