Activity 5.1. Snowmelt infiltration assessment for the unsaturated zone

The assessment of the existing infiltration methods based on energetic equilibrium and on the temperature index revealed the advantages and disadvantages of both methods. The models based on the temperature index are easy to apply and have reasonable results, bur sensitive to weather conditions, especially wind speed and solar radiation. In order to improve these methods and to raise the accuracy of the results it recommended using the parameters concerning the wind and the humidity. The energetic equilibrium models are sensitive to data input estimation errors (wind, solar radiation and albedo). Thus, a better parameterization of the albedo factor, the wind function and a better estimation of the meteorological conditions could increase the accuracy of the results. In-situ measurements were performed to determine the infiltration from snowmelt. Based on these measurements a mathematical simulation model for water flow into the unsaturated zone was developed.

Activity 5.2. Aquifer modelling

Three representative study areas were chosen for the project. For each of them the geological, hydrogeological and climatic settings were described in detailed. The three study areas are: 1. Bolboci – Vf. Omu, 2. Prahova-Teleajen Aluvial Cone and 3. Colentina Site (Bucharest City).

The aquifer recharge process was considered for each of the hydro structures: fissured mountain aquifer and the las type of aquifer, represented by the Colentina Site. The predictions of water infiltration trough frozen soils can be used to assess the risks and damages caused by climate chance especially in mountain region and regions with permafrost.

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