Abstract
This study estimates rainfall interception losses from natural wetland ecosystems based on maximum canopy storage measurements. Rainfall interception losses play an important role in water balance, which is crucial in wetlands, and has not yet been thoroughly studied in relation to this type of ecosystem. Maximum canopy storage was measured using the weight method. Based on these measurements, daily values of interception losses were estimated and then used to calculate long-term interception losses based on precipitation and potential evapotranspiration data for the 1971–2015 period. Depending mainly on the number of days with precipitation, the results show that total interception losses for the growing season as well as monthly interception losses are around 13% of gross rainfall. This value is similar to the values observed for some forests. Hence, interception losses should not be disregarded in hydrologic models of wetlands, especially because data trends in meteorological conditions (mainly number of days with precipitation) show that interception losses will increase in the future if those trends stay the same.
Highlights
Rainfall interception is the process where ground surfaces, whether vegetated or sealed because of human construction, catching and retaining water during precipitation [1]
In sections of the valley abandoned by agriculture, as it is typical of natural river valleys with wetland vegetation, sedges will form in hummock
Of the nearly 70 them to the ecosystems of our research area was difficult due to the issue of distinguishing certain applications we found in the literature, only four were agricultural [3], and these models are difficult model parameters
Summary
Rainfall interception is the process where ground surfaces, whether vegetated or sealed because of human construction, catching and retaining water during precipitation [1]. It is of considerable importance in water resource management [2], and in the context of climate change [3]. The lack of knowledge about rainfall interception means that this process has been disregarded or underestimated in rainfall-runoff analysis [10]. Other models simplify interception and lump its value with transpiration: Topmodel [15], European Hydrological modeling System SHE [16], Wetspa [17]
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