The Phenomenon of Nonzero Norm of Long-Term Changes in the Total Water Supply in River Basins

In hydrology, the norm of changes in water supply is considered to be equal to zero, under long-term averaging. This assumption allows for calculating and mapping the long-term evaporation rates linked by the water balance with maps of precipitation and river runoff. The phenomenon of nonzero norm of change of the total water supply is provided using the effect of detection in stochastic systems. Was discovered a previously unknown phenomenon of detection of long-term changes in water supply in soil of river basins, namely, that under non-zero interaction intensity of inflow (outflow) of moisture into a watershed and saturation (emptying) of soil, a non-zero value of the average annual values of water supply changes occurs, due to the systematic shift of the average value with respect to the mode of probability density distribution of water supplies. One of the obvious applications of the discovered phenomenon is the adjustment of maps of the average long term evaporation in the areas, where the norm of water supply change is significantly different from zero.