摘要
为研究太湖流域的水环境现状和污染特征,通过分析研究区氮磷负荷变化对土地利用方式的响应,对太湖流域各土地利用方式与氮磷负荷特征的相关性及其影响因素进行研究.结果表明:1980年至2010年,太湖流域耕地面积占比由63.89%降到47.02%;而建设用地面积占比由9.70%增加到25.16%;林地面积微缩小;水域面积微提升;草地和未利用地面积不大且变化可忽略.各土地利用状态指数D_i大小依次为:建筑用地>耕地>未利用地>水域>林地>草地.太湖流域由于土地利用方式的转变带来的氮和磷排放对水体总氮(TN)负荷和总磷(TP)负荷的贡献均呈逐年递增趋势. TN在1980年3.71万t的基础上,2010年排放量增加了67.51%. TP负荷从0.33万t增加到了2010年的0.85万t.
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 D_i 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.
作者
田甲鸣
王延华
叶春
张茂恒
张明礼
Tian Jiaming;Wang Yanhua;Ye Chun;Zhang Maoheng;Zhang Mingli(School of Geography,Nanjing Normal University,Nanjing 210023,China;Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application,Nanjing 210023,China;Key Laboratory of Virtual Geographic Environment of Ministry of Education,Nanjing Normal University,Nanjing 210023,China;Chinese Research Academy of Environmental Sciences,Beijing 100012,China)
出处
《南京师大学报（自然科学版）》
CAS
CSCD
北大核心
2020年第2期63-69,共7页
Journal of Nanjing Normal University(Natural Science Edition)
基金
国家“十三五”水体污染控制与治理科技重大专项(2017ZX07203-005)
国家自然科学基金项目(41673107).
关键词
太湖流域
土地利用
转移矩阵
氮磷负荷
影响因子
Taihu Lake basin
land use
transition matrix
nitrogen and phosphorus loads
influencing factor
