Calculation of solid runoff of the Chegem River in the area of the quarry below the village Chegem Vtoroy (Kabardino-Balkar Republic)

Abstract

The purpose of the work- is to study the channel of the Chegem River to assess the possibility of channel mining of alluvial rocks taking into account the hydrological, channel regime and to determine the permissible volumes of sand and gravel mining with minimal negative impact on the natural complex. In order to solve the set tasks, in May 2023, field surveys of the Chegem River bed, downstream of Chegem Vtoroy settlement, were conducted. The survey results, available information on the topic under study and archival materials on hydrological and geomorphological characteristics of the Chegem River were analyzed. Calculations were made to determine the morphometric and hydrological parameters of the Chegem River, including the water discharge of a 1% rainfall flood, as well as the volume of solid runoff of the river bed in the area of the channel quarry. It was found that the volume of average annual solid runoff in the Chegem River channel depends on the flood regime. Based on the results of the study calculated the average annual allowable amount of sand and gravel extraction depending on the flood regime to minimize the negative impact on the river channel processes. It is concluded that it is necessary to conduct periodic monitoring in order to obtain relevant hydromorphometric data on the state of the Chegem River.