Compensation Valuation Due to Hydraulic Constraints

This work aims to valuate the benefits and/or damages related to the apposition of hydraulic constraints, considering the economic aspects and the appraisal ones. From an appraisal point of view, the valuation of hydraulic damage considers the ex ante compensation: for the imposition of the hydraulic constraint and for the preventive compensation of future damages. The constraint can probably produce a loss in terms of income and assets, but also a decrease in hydraulic risk and consequent economic benefits. Compensation for future damage concerns random events and expresses the variation in the hydraulic risk for the land subject to restriction. If the change in hydraulic risk produces a reduction in risk (due to less probability and/ or less damage), then the measure of the damage is negative and it corresponds to a surplus value of lands. The proposed methodological process essentially aims to define the function of the ex post damage and to identify the criteria and the procedural process in order to valuate the damage caused to land as a result of the imposition of the hydraulic constraint and future damage avoided which have to be indemnified in advance (ex ante).