SPATIAL AND TEMPORAL CHANGES IN PRECIPITATION IN THE YELLOW RIVER BASIN IN THE LAST 50 YEARS
Spatial and temporal features in precipitation in the Yellow River Basin was analyzed with GIS technology, with precipitation data from 827 gauge stations from 1951-1998. Spatial changes in 200, 400 and 800 mm precipitation contours were made, which showed precipitation contours moving toward the north and drought in the Loess plateau region. Spatial change contours in flood season, non-flood season and annual precipitation between 1951-1979 and 1980-1998 were made, which showed increased precipitation in most region of the Loess plateau. Downstream region showed decreased precipitation, whereas headstream region of the Yellow River, Yiluohe basin, headstream region and downstream region of the Fenhe basin showed a trend for increase. Fluctuation seen with precipitation were not exactly identical for flood season, non-flood season and annual precipitation.
precipitationspatial and temporal changestypical precipitation contoursthe Yellow River Basin