RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2017, Vol. 26 >> Issue (04): 606-614.doi: 10.11870/cjlyzyyhj201704014

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RESEARCH ON SPATIO-TEMPORAL PATTERN EVOLUTIONOF NPS PARTICULATE PHOSPHORUS LOAD IN HONGZE LAKE BASIN UNDER DIFFERENT LANDUSE PATTERNS

MIN Min1,2, LIN Chen2,3, XIONG Jun-feng2,4, SHEN Chun-zhu3, JIN Zhi-feng3, MA Rong-hua2, XU Jin-duo2   

  1. 1. Key Research Institute of Yellow River Civilization and Sustainable Development&Collaborative Innovation Center on Yellow River Civilization of Henan Province, Henan University, Kaifeng 475001, China;
    2. Key Laboratory of Watershed Geographic Sciences/Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China;
    3. The Ministry of Land and Resources Development and Protection Key Laboratory of Coastal Zone, Nanjing 210024, China;
    4. School of Geography and Remote Sensing, Nanjing University of Information Science&Technology, Nanjing 210044, China
  • Received:2016-09-06 Revised:2016-11-30 Online:2017-04-20
  • Supported by:
    National Natural Science Foundation of China (41671284);Ministry of Land and Resources Development and Protection Key Laboratory of Coastal Zone (2015CZEPK01)

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Abstract: In this study, quantitative characterization of the spatial and temporal variation of non-point source (NPS) particulate phosphorus loads in the watershed area of the Hongze Lake since 1990 was carried out in order to find out the internal relation and the influence mechanism between non-point pollution and land use change Conclusions are as follows:1.during 1990~2012, the total loads of particulate phosphorus presented a trend of "fall-rise fall", with a gradual downward trend in 1990-1996, a stable growth state in 1996-2006, and a rapid downward trend after 2008. And the highest value was 2253.67 t/a in 2012, and the lowest value was 510.03 t/a in 1990; 2.There was significant spatial differences in the intensity of Par-P. The high value area was distributed in a variety of mixing zone of the tributaries of the Huaihe River basin, with an average Par-P intensity of of 3.88 t/km2/a. The low value area was mainly distributed in the wetland protection area of the Bian River Basin, with an average Par-P intensity of of 0.57 t/km2/a; 3. Average Par-P intensity of different land use patterns ranked as follows:Huaihe River Basin (681.84t/a), Gaosong River Basin (317.65t/a), Weiqiao River Basin (185.73t/a), Bian River Basin (121.09t/a). The corresponding land use pattern is a variety of mixed, urbanization rapid growth, the dominant land, wetland protection. The increase in the area of agricultural land and construction land will increase the phosphorus pollution, and the land types of forest land and wetland can significantly reduce the loss of particulate phosphorus. Rational land use planning has an important role in alleviating the non-point source pollution of particulate phosphorus. This study can extend the connotation of watershed NPS pollution research, and showed significant meaning for Integrated research of watershed scales, and also can provide the scientific basis for LUCC adjustment oriented to lake environment protection and management.

Key words: land use, non-point source pollution, particulate phosphorus loads, Hongze lake basin

CLC Number: 

  • X53
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