ИСТИНА

Studying river water regime is necessary for understanding nutrient and pollutant balances at the drainage catchment. In particular, continuous water discharge data are important for estimating chemical compounds runoff from the watershed. Such data, however, can be difficult to obtain at selected remote locations, especially for many small natural streams. In this study, we propose a framework that allows filling temporal data gaps using the observed dependence of water runoff discharge and stream water level. We used the daily data for several reference years (2001, 2005, 2010 and 2015) available for natural hydrological/hydro-chemical point of a small river Komarovka in the Russian Far East. The watershed of this mostly rain-fed river spans the steeper slope of Sikhote-Aline range. We identify two characteristic runoff-stream dependence regimes within each year of observations. The first one refers to the …