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基于InVEST模型的贵州省珠江流域水质净化功能分析(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2016年05期
Page:
87-92
Column:
研究论文
publishdate:
2016-09-30

Article Info:/Info

Title:
Analysis of water purification function in the Pearl River basin in Guizhou Province using InVEST model
Article ID:
1000-2006(2016)05-0087-06
Author(s):
HAN Huiqing1LUO Xuqiang2*YOU Renlong3LUO Xiaoshan3CHEN Yao3
1.College of Architecture and Urban Planning, Guizhou Institute of Technology, Guiyang 550003, China;
2.College of Geography and Tourism, Guizhou Normal College,Guiyang 550018 China;
3. College of Geography and Environmental Sciences, Guizhou Normal University, Guiyang 550001, China
Keywords:
water purification function InVEST model water quality assessment spatial heterogeneity Pearl River basin Guizhou Province
Classification number :
X522
DOI:
10.3969/j.issn.1000-2006.2016.05.014
Document Code:
A
Abstract:
Water purification function plays an important role in ensuring water quality in the whole basin and has great significance to sustainable economic and social development. Based on the remote sensing data of Landsat TM/ETM+, this paper explored the change of water purification function from 2000 to 2010 in the Pearl River basin in Guizhou Province using the InVEST model. The results showed that: ① the forest land, arable land and grassland dominated the land use types. Areas of these land use types accounted for more than 98.00% of the total area. Areas of forestland, grassland, built-up land and water body increased while the area of arable land declined. The 1 002 and 713 km2 declined arable land converted into forestland and grassland, respectively. The unused land remained unchanged. ② The average outputs and retentions of nitrogen(N)and phosphorous(P)in the whole basin decreased by 6.67% and 4.99%, respectively. The average outputs of N, P in Liujiang and Nanpanjiang basins were less than that in Beipanjiang and Hongshuihe basins. The average retentions of N, P in each basin showed that Nanpanjiang and Beipanjiang basins>Hongshuihe basin>Liujiang basin. The average outputs and retentions of N, P decreased in most part of the basin. The average outputs and retentions of N, P increased in a few parts of the basin. The spatial heterogeneity of land use pattern and the Green for Grain Project are the main factors affecting the spatial and temporal characteristic of water quality purification function in the basin.

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Last Update: 2016-10-30