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Floods are exceptional processes, observed in daily life as part of the hydrological cycle or as unusual extreme events. As a result of significant precipitation, snowmelt or/and anthropogenic pressures and technogenic disasters river flow rapidly increase causing an overflow on rivers floodplain with possible damages on the crop, households, economy, infrastructure, social life, etc. Observed consequences depend on the local conditions. They can be negative or insignificant in case of comparatively minor floods, ...

Drought is a phenomenon with a possible negative effect on agroecosystems. It can cause significant impact and damages on crop, when the water balance is seriously affected. But additional harmful effects can be observed also on the whole agroecosystem. This is connected to the land surface and vadose zone, to the physical and chemical properties of soil and water; to the adjacent organisms, etc. To prevent and mitigate the possible dangerous effects of importance is best to know all the specifics of the drought p...