摘要
以美国通用土壤流失方程为基础,根据研究流域的特征和已有的研究成果确定方程中的因子算式,在地理信息系统GIS支持下,估算了各单元的土壤流失量,应用吸附态非点源污染负荷模型,对嘉陵江流域吸附态氮磷污染负荷进行了数值模拟与定量分析。结果表明:嘉陵江流域近年平均输沙模数为161.94 t/(km2.a),北碚出口吸附态氮磷污染负荷分别为29620.8 t/a和1391.96 t/a,吸附态氮磷流失较严重的地区主要分布在白龙江和西汉水流域,各土地利用类型吸附态氮磷流失模数大小顺序依次为:荒地>灌木>草地>农田>城镇>林地。
Some reasonable and suitable methods for factor calculation of the equation were chosen based on the American Universal Soil Loss equation,the characteristics of the Jialing River basin in P.R.China,and related research results.The soil erosion and loss in each hydrological unit of the basin were estimated using GIS.Employing the non-point source adsorbed nutrition load model,the loads of adsorbed nitrogen and phosphorus pollution were calculated and analyzed.The results show that the average sediment trans...
出处
《重庆建筑大学学报》
CSCD
北大核心
2008年第3期87-91,共5页
Journal of Chongqing Jianzhu University
基金
中国科学院西部行动计划项目“三峡库区水土流失与面源污染控制试验示范”(KZCX2-XB2-07)
重庆市科委基金项目(8091)
关键词
嘉陵江流域
非点源
水土流失
吸附态氮磷污染
Jialing River Basin
non-point source pollution
soil and water loss
adsorbed nitrogen and phosphorus pollution
