地理科学 ›› 2003, Vol. 23 ›› Issue (4): 460-463.doi: 10.13249/j.cnki.sgs.2003.04.460

• 论文 • 上一篇    下一篇

非点源营养负荷泥沙关系的建立及其应用

李怀恩, 蔡明   

  1. 西安理工大学环境科学研究所, 陕西 西安 710048
  • 收稿日期:2002-07-17 修回日期:2002-12-28 出版日期:2003-07-20 发布日期:2003-07-20
  • 基金资助:
    高等学校优秀青年教师教学科研奖励计划与陕西省自然科学研究计划项目.

Relationship Between Nonpoint Source Nutrient Load and Sediment and Its Application

LI Huai-En, CAI Ming   

  1. Environmental Science Institute, Xi'an, University of Technology, Xi'an Shaanxi 710048
  • Received:2002-07-17 Revised:2002-12-28 Online:2003-07-20 Published:2003-07-20

摘要: 为满足水污染控制规划和流域水资源保护工作的需要,以几个流域的非点源污染监测资料为基础,建立了TP、TN等营养物的非点源污染负荷—泥沙定量关系,相关系数高达0.9以上。以渭河的支流黑河和陕南的汉江流域为例,具体说明了污染负荷—泥沙关系法的应用步骤和预测结果,并与水质水量相关法的结果进行了对照。结果表明,该方法可用于次暴雨及不同频率代表年的非点源营养负荷量预测。

Abstract: Nonpoint source load is one of the main sources of surface water pollution. The representative annual load is the base of water pollution control. So it is very important to develop the load estimation methods of nonpoint source pollution under the limited data conditions since there are no long series of measurements on nonpoint source pollution in China. In order to meet the needs of water pollution control planning and water resources protection, on the basis of theory analysis and measured event data of nonpoint source pollution from four watersheds in the middle and the southern Shaanxi Province, with areas from 15 to 3092 km2, the linear relationships between the unit load of TP, TN and unit sediment are established. Their correlation coefficients are larger than 0.9. Two examples of load prediction of nonpoint source nutrients are carried out to show the specific application procedure. One of them is the prediction of TP and TN for single extreme flood, wet year and long-term average year for the Heihe River valley with an area of 1481 km2; and another the prediction of TP and TN for different representative years for the Baihe River section (56310 km2) of the Hanjiang River, the largest branch of the Changjiang(Yangtze) River. The prediction results are compared with those of correlation method of water quality and quantity, and there are no great differences. It is concluded that this method can be applied to estimate nonpoint source nutrient loads for single event and representative years with different frequencies. Since nonpoint source pollution depends on the process of rainfall-runoff-erosion, land-use types and many other factors, the obtained relationships between nutrients and sediment will be more typical if measured data consists of high, middle and small floods. In addition, the established relationship can only be applied to the same watershed or similar watersheds to reduce prediction error of nutrient loads.

中图分类号: 

  • X131.2