基于PCRaster的流域非点源氮磷负荷估算 | |
赵广举 ; 田鹏 ; 穆兴民 ; 高俊峰 ; 李恒鹏 ; 张增信 | |
刊名 | 水科学进展
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2012 | |
卷号 | 23期号:1页码:80-86 |
关键词 | 氮 nitrogen 磷 phosphorus PCRaster PCRaster 月水文模型 monthly water balance model 输出系数模型 export coefficient model |
其他题名 | Estimation of nitrogen and phosphorus loads in the |
中文摘要 | 以太湖流域上游的西笤溪流域为研究区,应用动态环境模拟语言PCRaster构建月水文和氮磷营养物质输出模型,分析流域内氮磷输出的时空分布特征。以输出系数法为基础,将分布式水文模型与非点源负荷模型相结合,应用地理信息技术构建基于栅格的非点源污染模拟模型,根据1988~2007年的水文、水质实测数据对模型进行率定和验证,定量分析西笤溪流域非点源污染负荷量与氮磷输出的空间分布。研究结果显示:基于单元网格的月水文模型在该流域具有较好的应用效果,率定和验证期的Nash系数和线性相关系数R2均超过了0.80。应用模型估算西笤溪流域非点源污染2002~2005年总氮年输出量为1670~2035t/a,2002~2007年总磷输出量为102~164t/a。氮磷负荷的空间分布表明以稻麦或水稻/油菜轮作的农田是非点源污染的最主要来源。 |
英文摘要 | A monthly eco-hydrological model is developed to simulate the process of nutrient loading on the Xitiaoxi catchment of southeastern China. The environmental modeling language PCRaster is used in the model development. The eco-hydrological model combines a monthly water balance model with the export coefficient model ( MECM) for estimating total nitrogen ( TN) and total phosphorus ( TP) loads. The spatial-temporal distribution of nutrients loads on the catchment is analyzed. The result shows that the monthly streamflows at both Hengtangcun and Fanjiancun stations are well simulated by the eco-hydrological model as revealed by high values of Nash-Sutcliffe coefficients ( R2 > 0. 8) . The simulated TN loads vary from 1670 to 2035 t /a during 2002 - 2005,which are within the reasonable ranges. For the period 1999 - 2007,the TP load simulation is from 102 to 164 t /a,which are consistent with the observed values of Hengtangcun station. The spatial distribution of simulated nutrients loads indicates that the dominant sources of pollutions are from rice /wheat or rice /rapeseed lands. The results demonstrate the applicability of MECM in identifying sources of pollutions for water resources and fertilization managements on large-sized catchments. |
语种 | 中文 |
公开日期 | 2014-06-20 |
内容类型 | 期刊论文 |
源URL | [http://ir.iswc.ac.cn/handle/361005/5276] ![]() |
专题 | 水土保持研究所_水保所知识产出(1956-2013) |
推荐引用方式 GB/T 7714 | 赵广举,田鹏,穆兴民,等. 基于PCRaster的流域非点源氮磷负荷估算[J]. 水科学进展,2012,23(1):80-86. |
APA | 赵广举,田鹏,穆兴民,高俊峰,李恒鹏,&张增信.(2012).基于PCRaster的流域非点源氮磷负荷估算.水科学进展,23(1),80-86. |
MLA | 赵广举,et al."基于PCRaster的流域非点源氮磷负荷估算".水科学进展 23.1(2012):80-86. |
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