农业工程学报2011，Vol.27Issue(4)：54-59,6.DOI:10.3969/j.issn.1002-6819.2011.04.010
基于流域尺度的农业用地景观-水质关联分析
Analysis on linkage between farm landscape and water quality in Jiulong River watershed
摘要
Abstract
Correlation analysis was performed to explore the relationships between CODMn, NＨ4+-N, TP and farm landscape in the Jiulong River watershed. Linear regressions between water quality and farm land percents were also processed in flood season, dry season and average season. The results showed that the total proportion of farm lands located in the slopes less than 15 degrees and greater than 25 degrees were positively correlated with CODMn, NH4+-N and TP concentrations in the water. Contagion index (CONTAG) of farm lands was positively correlated with TP concentrations, and Shannon Diversity Index (SHDI) of farm lands was negatively correlated with TP concentrations.The determinate coefficients were 0.565 and -0.527, respectively. Water eutrophication was susceptible to farm land pollutions in flood season and dry season. The farm lands located in the slopes less than 15 degrees took up 74.3％ in the 100m-width riparian buffer. The farm lands located in the riparian buffer and in the deep slopes played a crucial role in water quality management, especially the non-point source pollution control in the Jiulong River watershed.关键词
水质/农田/环境影响/非点源污染/坡度/景观指数Key words
water quality/ farm/ environmental impact/ non-point source pollution/ slope/ landscape metrics分类
资源环境引用本文复制引用
孙芹芹,黄金良,洪华生,李青生,林杰,冯媛..基于流域尺度的农业用地景观-水质关联分析[J].农业工程学报,2011,27(4):54-59,6.基金项目
国家自然科学基金项目(40901100,40810069004) （40901100,40810069004）
福建省自然科学基金项目(2009J01222) （2009J01222）
