摘要
以泸州市土桥子水库小流域为研究对象,采用Johns输出系数模型,结合查阅文献和现场实测的方法确定符合小流域特征的输出系数值,估算了小流域实施非点源污染控制措施——测土配方施肥技术和农村建设沼气池前后(2009年和2013年)的TN、TP输出量,以水质监测和降雨量数据计算实际负荷量验证模型估算结果。结果表明:模型估算结果与实际偏差较小,该饮用水源地小流域2009年的TN、TP污染负荷入河总量为10.74、0.90t/a,2013年TN、TP污染负荷入河总量为5.90、0.63t/a,实施测土配方施肥技术对TN、TP的削减率分别为33.3%、17.1%,农村建设沼气池对TN、TP的削减率分别为11.2%、13.0%,综合使用两种措施,TN、TP的削减率分别为45.0%、29.6%。
Tuqiaozi Reservoir located in the southern hilly regions in Sichuan is considered as the research object .Johns export coefficient model was used to estimate TN ,TP nutrient load of 2009 and 2013 .After 2009 ,soil testing and formulated fertilization and Biogas digesters were used to control the pollution of NPS .The value of output coefficient was determined by practical measured and survey data .The results of model estimation were tested by the real monitoring load .The results indicated that model estimation re‐sults reached the actual deviation ,the TN ,TP nutrient load of 2009 were10 .74 ,0 .90 t/a ,the TN ,TP nutrient load of 2013 were 5 .90 ,0 .63 t/a .If soil testing ＆amp;formulated fertilization was used ,the reduction rate of TN ,TP nutrient load were 33 .3% ,17 .1% , and if biogas digesters were established ,the reduction rate of TN ,TP nutrient load could be 11 .2% ,13 .0% .Then TN ,TP nutrient load would be reduced to 45 .0% and 29 .6% if both measurements were applied .
出处
《中国农村水利水电》
北大核心
2014年第11期63-67,共5页
China Rural Water and Hydropower
基金
四川省环境保护科技项目"基于川南丘陵山区饮用水水源地面源污染控制技术研究"
关键词
输出系数模型
非点源污染
乡镇
饮用水源地
测土配方施肥
沼气池
TN、TP削减
export coefficient model
non-point pollution
rural areas
drinking water source
soil testing and formulated fertiliza-tion~ biogas digester
reduction of TN, TP
