[1]WANG Xiu-juan,LIU Rui-min,HE Meng-chang.Spatial-temporal Characteristic of Non-point Source Pollution (NPS) Nitrogen in Songliao Basin[J].Research of Soil and Water Conservation,2009,16(04):192-196,202.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
16
Number of periods:
2009 04
Page number:
192-196,202
Column:
Public date:
2009-08-20
- Title:
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Spatial-temporal Characteristic of Non-point Source Pollution (NPS) Nitrogen in Songliao Basin
- Author(s):
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WANG Xiu-juan, LIU Rui-min, HE Meng-chang
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State Key Laboratory of Environment Simulation and Pollution Control, School of Environment, Beijing Normal University, Beijing 100875, China
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- Keywords:
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Songliao basin; non-point source pollution; export coefficient modeling approach; TN; land use; non-land use
- CLC:
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X522
- DOI:
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- Abstract:
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Non-point source pollution (NPS) was mainly coursed by land-use and non-land use, so it was important to analyze the interaction between the land-use NPS and non-land use NPS in order to put forward the more effective management measures. In this paper, temporal-spatial changes and changing tendency of non-point source pollution in Songliao basin over the last 15 years was studied based on the simulation of nitrogen load by export coefficient model. The results indicated that the NPS TN load caused by land use and non-land use increased year by year. It increased from 1.29×106 tons in 1986 to 1.44×106 tons in 2000.The TN load caused by land use occupied quite a few proportions, Heilongjiang Province and Inner Mongolia Autonomous Region are the most important two contributors, with an average annual contribution-ratio of 83%. From 1986 to 2000, the TN load proportion caused by non-land use increased, and the region of Jilin Province had the highest change proportion, with an average annual contribution-ratio of 38.5%. These areas should be paid more attention in the future.