Automated construction method of drainage basin of rivers of Nakhchivan Republic based on digital elevation model

Abstract

Currently, geoinformation technologies are widely used in hydrology for operational calculations and assessment of water resources. The use of aerospace technologies, in particular, digital three-dimensional relief models, makes it possible to quickly carry out automated complex analysis and interpretation of materials from the hydrological analysis of river networks. This article provides a detailed description of the stages of building a model of the river drainage basin on the territory of the Nakhchivan Autonomous Republic of Azerbaijan (NAR) based on a digital elevation model and the use of hydrological analysis tools in a geographic information system. As a result of the study, the morphometric characteristics of the relief were generalized into operational-territorial units of analysis - river basins. For each river basin, average, minimum, and maximum heights, range of heights, average values of slope steepness, exposure, erosion potential of the relief, and other statistical parameters are determined. A number of hydrological maps have been compiled. A feature of the constructed model for the Nakhchivan Autonomous Republic, presented in this article, is the ability to extend it to the creation of a drainage basin of any territory in an automated mode, changing only the initial data.

Keywords: Hydrology, River basins, Digital elevation model.