Abstract
River deltas are characterized by a very complicated and unsteady water regime. They are affected by changes in the river regime at the upper boundary of the delta, changes in the sea level at its lower boundary, and by hydrological and morphological processes within the delta itself. The most significant indicators of all processes affecting the water regime in the delta are changes in water discharges and water levels at various points of the delta hydrographic network as a function of water discharge in the delta head. These dependences are taken as a basis for hydrologic calculations in river deltas. This paper presents a physicostatistical method for plotting, assessing accuracy, and establishing the dynamics of water discharges and water levels in delta streams as a function of water discharge in the delta head. The automated technique allows for an operative solution of hydrologic tasks in river mouths. Recommendations to optimize hydrometric works in river deltas are suggested, which would take into account time-specific changes in delta hydromorphology and delta monitoring tasks.
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