EVALUATION OF THE INFLUENCE OF MOUNTAIN PEAT BOGS RESTORATION MEASURES ON THE GROUNDWATER LEVEL: CASE STUDY ROKYTKA PEAT BOG, THE ŠUMAVA MTS., CZECH REPUBLIC
The paper evaluates measures taken to restore mountain Peat Bogs and their effect on hydrological regime, with the main focus on groundwater levels. The level of groundwater is a key factor in maintaining the character of mountain Peat Bogs and the main objective of restoration is to increase and stabilize the groundwater level in disturbed Peat Bogs. At the same time, the paper provides a complex overview of the topic, which is being often discussed nowadays, mostly due to a big retention potential of mountain Peat Bogs. The paper is based on detailed measurements of groundwater levels in a selected experimental drainage ditch in the catchment of the Rokytka stream. Basic statistical characteristics, the equation of Penman-Montheit or antecedent precipitation index were used to show the dependence of groundwater level on precipitation or evapotranspiration. The results show a positive influence of the restoration measures on Peat Bogs. In this case it has been confirmed that restoration measures cause increase of groundwater level and decrease its fluctuation in the Peat Bog.