Water runoff of small rivers flowing into the Gulf of Ob’ and Taz Bay: current state of research

Fresh water supply is a basic need of the gas and oil industry Yamal-Gydan region. Small rivers flowing into Ob’ Taz Bay could be used for solving this problem. The purpose study to summarise available research data on runoff small calculate catchment areas using GIS technologies. covers more than 200 in area Bay. It established that there have been no stationary observations them. Expedition discharges are summarized. More 40 involved consumption. from users State Water Registry questionable critically analyzed. Published annual maps region presented unified form. Consolidation showed an overall latitudinal distribution isolines. reliability river estimates largely determined by accuracy calculations. calculation has done two methods. Automated digitization DEM given incorrect results, which verified. Manual catchments labour-intensive, but gives reliable results lowland relief For first time, rivers’ obtained calculated. Difficulties arise names rivers, different one source another. necessary organize government monitoring including obligatory measurements discharge, all Sabetta-Yakha, Se-Yakha Messo-Yakha provide fresh economic facilities. modeling formation use satellite image promising directions assessment.