GEOINFORMATION MODELING OF THE ESIL RIVER FLOOD ZONE BASED ON REMOTE SENSING DATA

Abstract

The article presents the technique for geoinformation modeling of a site of a river valley with an insufficient amount of hydrological data. The technique will make it possible to carry out a forecast of hydrological phenomena in order to prevent the flooding of adjacent territories by flood waters. The study is based on the use of Earth remote sensing (RS) data and the use of geoinformation technologies (GIS). The sequence of the work is briefly described. The study was carried out on the example of a site of the valley of the Yesil (Ishim) river, located near Petropavlovsk (North Kazakhstan region, Republic of Kazakhstan). On the basis of remote sensing data and GIS technologies, a digital relief model of the studied section of the river valley was developed. The initial data were SRTM (Shuttle Radar Topography Mission) images. The modeling of the scenario of possible flooding of adjacent territories by flood waters has been carried out. Modeling and mapping of flooding carried out for the flood peak. Modeling and construction of a flood map were carried out for the flood peak. An approach is proposed that makes it possible to perform a more accurate assessment of the boundaries of flooding without the procedure for calculating the hydrological characteristics of the river during the flood period and the absence of hydrometric observation data. Recommendations are given for the prevention of flood events, measures to protect adjacent lands from possible flooding. The obtained cartographic materials can be useful for planning and carrying out measures to prevent emergency situations related to floods on the river, reduce the risk of flooding of adjacent areas, and territorial design.