Forests have especially high interception capacities and therefore the interception loss often forms a considerable part of the total evapotranspiration. H.Ĭanopy interception, the amount of precipitation captured by the surface of plants and trees, is a key component of the water cycle as it constrains the water flux to the ground below vegetation. Based on these equation and the FORESEE bias corrected precipitation data an estimation is outworked for better understanding of the feedback of forest crown on hydrologicalĮxamining the canopy interception at a forest field site using cosmic-ray neutron detectionĪndreasen, M. Interception measurements and the CREMAP evapotranspiration data help to calibrate a simple interception loss equation based on Merriam's work. With the combination of the ground based observations, MODIS LAI datasets a simple function is developed to describe the average yearly variations in canopy storage.

Long-term interception measurements are available in several forest sites in HidegvÃz Valley. The study site, namely HidegvÃz Valley experimental catchment, is located in the central valley of the Sopron Hills. Sopron Hills is located at the eastern foothills of the Alps in Hungary. In this study a site based estimation is outworked for the Sopron Hills area. It contains observation based precipitation data for the past and uses bias correction method for the climate projections. Rainfall distribution derived from the FORESEE database which is developed for climate change related impact studies in the Carpathian Basin. In this study MODIS sensor based LAI time series are used to estimate changes of the storage capacity. There are several methods to derive LAI from remote sensed data which helps to follow changes of it. LAI shows significant variability both spatial and temporal scale.

Some equations are available to quantify this dependence. It shows strong correlation with the leaf area index (LAI). Canopy storage capacity depends on several factors. Average amount of interception loss is determined by the storage capacity of tree canopies and the rainfall distribution.

This process determines the net intake of forest soils and so important factor of hydrological processes in forested catchments. They intercept significant amounts of precipitation and evaporate back into the atmosphere during and after precipitation event. Tree canopies play a rather important role in forest hydrology. Kalicz, PÃ©ter Herceg, AndrÃ¡s Kisfaludi, BalÃ¡zs CsÃ¡ki, PÃ©ter Gribovszki, ZoltÃ¡n Canopy interception variability in changing climate

Interception by Fiona Davenport