CLEANWATER / Activities                          IMPORTANT TO RETAIN

Modelling approach for environment protection and water service recovery costs

Description (what, how, where and when): This action is a demonstration action to be carried out at basin level, providing elements on assessment methods (simulation models and trend analysis) for the evaluation of trends in pollution pressures and water quality evolution under the influence of climatic conditions. Adaptation of mathematical models to the characteristics of the study area allows analyzing the pollution transfer within the river basin, to quantify the impact of human activity, to designate the vulnerable zones and to evaluate the effect of measures in terms of nutrient concentrations. Application of mathematical models (surface water, groundwater and soil models) taking into consideration the Barlad basin characteristics shall be carried out by incorporating inputs from the GIS database in the models, in order to run it for the presented environmental situation.

For the surface water the modeling approach concerns the use of Seneque/Riverstrahler model which is one of the few available approach for modeling nutrient cycling and ecological functioning in the river catchments.The model outputs are the runoff and associated seasonal and geographical variations of nutrients within the Barlad basin. The application of modeling approach at the basin scale will be performed by the experts of NIHWM, having technical assistance from the French scientists which have developed the model.

Additionally it will be used a complex modular two-dimensional transport model for the simulation of advection, dispersion, and chemical reactions of dissolved constituents in groundwater systems. The model outputs are the piezometriques maps and nitrate concentrations maps, for the aquifer cells, characterized by the pollution plume.

The environmental and resource costs are defined in the context of the WFD as the costs of measures aimed at the protection of aquatic ecosystems. The analysis is carried out by engineer- economist and other experts from the National Administration "Apele Romane" and the NIHWM. The cost-effectiveness analysis that we are planning to perform is linked to the measures provided in the Action Program, already taken or in place to reduce or eliminate the environmental damage caused by a specific pressure. Taking into account the international experience, other new measures shall be also considered.

Resource costs are related to the use of water as a scarce resource in a particular way (e.g. through abstraction or wastewater discharge) in time and space. The resource costs are the result of an inefficient allocation (in economic terms) of water and/or pollution over time and across different water users, because an alternative water use generates a higher net economic value. The environmental costs (e.g. cost for a higher treatment level or an increased treatment capacity) shall be estimated function of existed methodology and will be shaped into a cost database. The current costs refer to actual expenditures to protect aquatic ecosystems, while future cost refer to the costs associated with additional measure that have to be taken in order to meet environmental goals. This latter cost will be based on the cost-effectiveness analysis that has to be carried out in order to diminish the gap between the current and desired situation regarding the water status in 2015.