|Table of Contents|

The Evolution of Land Use Types and Its Effects on the Nitrogenand Phosphorus Loads in the Taihu Lake Basin(PDF)

《南京师大学报（自然科学版）》[ISSN:1001-4616/CN:32-1239/N]

Issue:
2020年02期
Page:
63-69
Research Field:
·地理学·
Publishing date:

Info

Title:
The Evolution of Land Use Types and Its Effects on the Nitrogenand Phosphorus Loads in the Taihu Lake Basin
Author(s):
Tian Jiaming1; Wang Yanhua1; 2; 3; Ye Chun4; Zhang Maoheng1; 2; 3; Zhang Mingli1
(1.School of Geography,Nanjing Normal University,Nanjing 210023,China)(2.Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application,Nanjing 210023,China)(3.Key Laboratory of Virtual Geographic Environment of Ministry of Education,Nanjing Normal University,Nanjing 210023,China)(4.Chinese Research Academy of Environmental Sciences,Beijing 100012,China)
Keywords:
Taihu Lake basin; land use; transition matrix; nitrogen and phosphorus loads; influencing factor
PACS:
X502
DOI:
10.3969/j.issn.1001-4616.2020.02.011
Abstract:
To analyze the present status and pollution characteristics of water environment in the Taihu Lake basin,the response of nitrogen and phosphorus loads in the water body to land use types was investigated. The influencing factors were identified and compared. Results show that during 1980-2010,the percentage of cultivated land in the basin decreased from 63.89% to 47.02%,while that of the constructed land increased from 9.70% to 25.16%. For the forest land,the area decreased slightly,and the water area increased slightly. Both areas of grassland and unused land were small and no obvious change was observed. The order of Di value of each land use type is as follows:constructed land>cultivated land>unused land>water area>forest land>grassland. The contribution of nitrogen and phosphorus discharged from each land use type to the water loads in the Taihu Lake basin due to the change of land use type is increasing annually. The discharged nitrogen amount increased by 67.51% in 2010 from 37 100 t in 1980. The phosphorus load was also enhanced from 3 300 t to 8 500 t in 2010.

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Last Update: 2020-05-15