水土保持学报2017，Vol.31Issue(6)：20-26,7.DOI:10.13870/j.cnki.stbcxb.2017.06.004
流域基流氮磷流失的非点源污染定量研究
Quantitative Study on Nitrogen and Phosphorus Loss in Baseflow of Typical Agricultural Watershed Based on Non-point Source Pollution Model
摘要
Abstract
Based on the digital filtering technology baseflow nutrient load recession analysis and meteorological factors,a recursive filter loading separation algorithm (RFLSA) for the daily load fraction of baseflow nutrient estimation was proposed and established.Quantitative analysis of the total nitrogen (TN) and total phosphorus (TP) loss of baseflow was carried out in the Changle River Watershed of Zhejiang,Shengzhou.The results showed that the R2 of baseflow TN daily load simulation was 0.86,and the simulation efficiency coefficient NSE was 0.72,and the above parameters for baseflow TP were 0.65 and 0.63.The mean annual TN and TP loss through baseflow in the studied watershed from 2003 to 2012 were 1 317.6 t (15.25 kg/hm2) and 51.8 t (0.60 kg/hm2),respectively,and accounted for 61.82％ and 56.92％ of the TN and TP loss in annual total runoff.Along with the increasing of precipitation during 2003 to 2012,the baseflow TN and TP losses showed a significant upward trend,and has become an important pollution source of non-point source pollution of rivers.关键词
基流/氮/磷/养分流失/数字滤波/非点源污染Key words
baseflow/nitrogen/phosphorus/nutrient loss/digital filtering/non-point source pollution分类
资源环境引用本文复制引用
何圣嘉,吕军..流域基流氮磷流失的非点源污染定量研究[J].水土保持学报,2017,31(6):20-26,7.基金项目
国家自然科学基金项目“农业流域地下水富营养趋势与基流对非点源污染贡献的定量研究”(41571216) （41571216）
