摘要
以红壤丘陵区典型流域——浏阳河流域为研究区域，利用1986、2000、2005年3个时段的土地利用数据，分析土地利用方式的变化，并结合土壤普查图和降雨数据，在RS和GIS的支持下，利用长期水文影响评价（L—THIA）模型，评估区域长期水文响应，采用相似流域的营养盐输出系数估算非点源污染负荷。结果表明，从1986～2005年期间，林地和草地有向城镇、农村居民点用地和农业用地转化的趋势，其中农业用地由13．75％增加到20％左右，城镇用地和农村居民用地分别由原来的1．34％和0．10％变为2．56％和0．80％，期间非点源污染敏感区面积不断扩大，污染负荷不断增加，TN由1986年的675．56t增加到2005年的1001．02t，TP从15．52t增加到了23．41t。
Taking a typical watershed in hilly red soil region--Liuyanghe watershed as a case study, com- bined with the land-use of 1986, 2000 and 2005, soil and precipitation data, under the support of RS and GIS, the dynamic change of land-use was analyzed and the long term average surface runoff volume were estimated using L-THIA model. The results show that there is a significant trend of transforming from forest and grass land to urban, agricultural and rural residential areas, and from agricultural land to urban area. The agricultural areas increase from 13.75% in 1986 to about 20% in 2005 of the total watershed, and the urban and urban residential areas are changed from 1.34% and 0.10% in 1986 to 2.56% and 0.80% in 2005, separately, which make the sensitive areas of non-point source pollution expanding, and the pollution degree is more and more seriously from 1986 to 2005. The loads of TN and TP increase from 675.56 t to 1 001.02 t, 15.52 t to 23.41 t, respectively.
出处
《环境工程学报》
CAS
CSCD
北大核心
2009年第2期377-380,共4页
Chinese Journal of Environmental Engineering
基金
国家高技术研究发展计划(863)项目(2007AA10Z222)
国家杰出人才基金资助项目(50425927)
