Spatial database of the northern area of yellow river for research of sediment discharge

Nowadays, the absolute shortage of the water is happening at 31 nations of Asia and etc. This points that how water resources should be controlled. Global water problems are very important to adjust the natural resources in the twenty-first century. In this study, the one of the vast river in the world, yellow river in china was focused on the spatial database field, but only northern part of whole river region. In this paper, we used the topographical map, GTOPO30, SRTM, digital map and satellite data for special database. This database was used for getting some useful information of watershed-based sampling data like a river shape, surface character and etc.. In this paper, the results of extraction GIS database from non-digitalized data for this research between calculated and referenced data are compared. Contour diagrams, river channel network figure and watershed information were extracted from the spatial database. This paper shows that the special database is very useful for watershed-based sampling design.