不同种植模式下地表径流污染的空间分布特征  

The Special Distribution Characteristic of Contamination of Surface Runoff in Different Planting Pattern

作　　者：王侨[1] 何丙辉[1] 许红艳[1] 苏锋[1,2] 

机构地区：[1]西南大学资源环境学院,重庆400716 [2]重庆市合川区水利事业发展中心,重庆401520

出　　处：《水土保持学报》2008年第6期25-29,共5页Journal of Soil and Water Conservation

基　　金：国家自然科学基金(40671115);重庆市自然科学基金重点项目(2007BA1015)

摘　　要：对重庆市渝北区鸽子沟小流域7种不同种植模式径流小区的雨后径流进行了水样分析,结果表明:与治理前相比,整个集雨区的径流污染治理程度以中、下坡植被覆盖度较高的复合种植模式径流小区总体治理效果最为显著,中坡为单一种植模式,下坡为植被覆盖度较低的复合种植模式径流小区总体治理效果最差。下坡为新栽柑橘的复合种植模式径流小区Cd含量最高,中坡为单一种植模式,下坡为植被覆盖度较低的复合种植模式径流小区Pb含量最高。径流污染程度最小的是中、下坡植被覆盖度较高的复合种植模式径流小区,径流污染程度最大的是下坡为新栽柑橘的复合种植模式径流小区。径流中TN,Cd,TP,Pb含量和泥沙有显著相关关系;COD和TP、泥沙呈显著关系;TN含量是影响COD的主要影响因子。Water property of runoff in seven planting patterns was conducted in runoff area of Gezigou watershed, Yubei, Chongqing. The results show that： compared with the un-harnessed area, the comprehensive planting patterns in middle and foot slope runoff sections with high vegetation cover are harnessed effectively, the signal planting patterns in the middle slope but comprehensive planting patterns in the foot slope runoff sections with lower vegetation cover are worst. The content of Cd in the comprehensive planting patterns in the foot slope runoff section with oranges planted recently and the content of Pb in the signal planting patterns in the middle slope but comprehensive planting patterns in the foot slope runoff sections with lower vegetation cover are the highest. The contamination degree in the comprehensive planting patterns in the foot slope runoff section with oranges planted recently is the least, but the most contamination degree appealed in the comprehensive planting patterns in middle and foot slope runoff sections with high vegetation cover. There are remarkably correlation between TN, TP, Pb, Cd, COD and sedimentation in surface runoff; there are also remarkably correlation between the content of COD and TP,sedimentation, moreover the content of TN is the principal factor affected COD in surface runoff.

关 键 词：种植模式 地表径流污染 空间分布 

分 类 号：TV121[水利工程—水文学及水资源] X131.2[环境科学与工程—环境科学]