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| Temporal and spatial distribution characteristics of NPS particulate phosphorus driven by land use in Hongze Lake tributary basin |
| Received:October 27, 2016 |
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| KeyWord:particulate phosphorus;land use;correlation;SEDD model |
| Author Name | Affiliation | E-mail | | YE Zu-xin | Key Laboratory of Karst Environment and Geohazard Prevention, Guizhou University, Guiyang 550003, China
Key Laboratory of Watershed Geographic Sciences, Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China | | | LIN Chen | Key Laboratory of Watershed Geographic Sciences, Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China | clin@niglas.ac.cn | | AN Yan-ling | Key Laboratory of Karst Environment and Geohazard Prevention, Guizhou University, Guiyang 550003, China | | | WU Qi-xin | Key Laboratory of Karst Environment and Geohazard Prevention, Guizhou University, Guiyang 550003, China | | | LIU Bin | Land Development and Consolidation Center of Jiangsu Province, Nanjing 210017, China | | | SUI Xue-yan | Land Development and Consolidation Center of Jiangsu Province, Nanjing 210017, China | | | MA Rong-hua | Key Laboratory of Watershed Geographic Sciences, Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China | |
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| Abstract: |
| Land use changes greatly influence non-point source particulate phosphorus pollution. Here,the effect of land types changes non-point source particulate phosphorus pollution was studied based on remote sensing image(Landsat TM/ETM) in 1990, 2000, 2005 and 2010 using the method of sediment delivery-distribution model. The results showed:There was a close relationship between land use types and non-point source(NPS) particulate phosphorus load. In the region of NO.2 and NO.3 sub-basins,constructed land and forest had significant positive correlation with particulate phosphorus load. Driven by the demand of Xuyi and surrounding cities. The arable land which in NO.2 and NO.3 sub-basins were conversed from the original cultivation of rice to vegetables and other high added value crops. For increasing application rate of phosphorus fertilizer,particulate phosphorus load increased which is close to the change trend of constructed land and forest.Dry land had negative correlation with particulate phosphorus load in NO.4 sub-basin,which is resulting of changing crop types. In the other sub-basins,mostly appearing that paddy field and dry land had significant positive correlation with particulate phosphorus load,but forest and constructed land reversed. |
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