Yan G.,Harbin Normal University |
Yan G.,Institutions of Higher Education in Heilongjiang Province |
Zhang S.,Harbin Normal University |
Zhang S.,Institutions of Higher Education in Heilongjiang Province |
And 8 more authors.
Journal of Natural Disasters | Year: 2013
With effective control and management of point source pollution in Songhua River Basin, the surface source pollution is increasingly outstanding and has become the primary pollution source in Harbin section of the Songhua River Basin. To investigate output capacity of surface source pollution in different land use types, TM images and DEM data of the region were processed and analyzed by RS and GIS technology. Results show that, the areas of cultivated land, saline-alkaline land, GIS grassland area and construction used land are 14 918. 29 km2, 13 886. 12 km2 and 2 868. 8 km2 respectively, which occupy 44. 37%, 41. 3% and 8. 52% of the total basin area. The basin flow through Song-Nen Plain and the slope is gentle. The area with slope of less than 25°occupies 93. 42%, and the area with slope of less than 15°occupies 77. 56%. The largest part of pollution source is agricultural surface source pollutant, followed by saline-alkaline land and construction used land. These are main surface source pollutions. Principle sources of pollutants includes chemical fertilizer, pesticide, crop growth regulator, domestic animals and fowls manure wastewater, domestic sewage, domestic solid wastes and human wastes. The total quantity of surface source pollution of the basin were estimated by calculation model and monitor data.