MEASUREMENT AND MONITORING OF RESULTS.

Entity responsible: University of Granada. Water Institute.  

Description of action:

The following aspects are monitored in all the installed plant filters:

  1. The physical-chemical pollution of the water, before and after passing through the filters set up on the plots of land: measurement of BOD5 (biological oxygen demand), COD (chemical oxygen demand), SS (suspended solids), Nitrate, Ntotal (total nitrogen), Phosphate and Ptotal (total phosphorous), to verify their degree of reduction.
  2. The microbial population in the plant filters: microbiological control of the water and soil to determine the presence of microorganisms with the necessary denitrifying capacity to eliminate nitrogen from the water.
  3. The production of gases through the denitrification process, measuring the N2O gas and the evolution of the agronomic parameters.

The results of these measurements will be compared with those obtained in the witness plots, with similar characteristics, in which no filters have been installed, thus verifying the system’s degree of effectiveness.

MONITORING AND CONTROL LOG BOOK FOR THE MAINTENANCE AND OPTIMISATION OF THE PLANT FILTERS.

Entity responsible: Paisajes del Sur SL

Description of action:

With the help of a monitoring and control log book, maintenance work on the plant filters is supervised, making any necessary suggestions for the upkeep of the installations and vegetation.

QUANTIFICATION OF THE ENVIRONMENAL AND ECONOMIC ADVANTAGES OF THE APPLIED MODEL.

Entity responsible: Paisajes del Sur, SL.

Description of action:

The use of sub-products and plant remains to make the filters, the increased biomass produced in the soil and the reduced erosion will cause the productive capacity of the soil in the area of action to be maintained, and so prevent the loss of its fertile layer.

Within this framework, a list of practical field tasks is drawn up, quantifying the labour required, as well as the natural resources used as products or sub-products, with an estimation of the generated biomass and the reduction in erosion.

COST-BENEFIT ANALYSIS OF THE SYSTEM TO ESTABLISH ITS EFFICIENCY.

Entity responsible: University of Granada. Water Institute.  

Description of action:

The cost efficiency is evaluated, with an economic assessment of the benefits offered by the installation of plant filters as opposed to the alternative of not doing anything.

The methodology used is as follows:

  1. Measure the real effectiveness as regards the reduction in nitrogen through the plant filters.
  2. Assess the cost of their construction, bearing in mind the installations’ expected useful life.
  3. Calculate the cost entailed in the aspired reduction in fertilisers through preventive activities, using the IT tool as a guide for dosage.
  4. Financially calculate the intangible benefits of implementing the system, with regard to improving environmental conditions.

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