袁水上游小流域非点源污染研究——实验设计与数据初步分析

选择江西赣江上游袁水小流域作为实验区域，并对实验结果进行了统计分析与模型模拟计算。结果表明，不同土地利用类型产生的污染物负荷存在着较大的差异，非溶解性污染物负荷与地面覆盖情况密切相关，而部分溶解性污染物与土壤背景值密切相关。SWAT(Soil and Water Assessment Tool)模型的模拟结果基本上体现了实验区域的非点源污染状况，在模型的帮助下，可以将基于实验区域的研究成果推广到全流域。

Non-Point Sources of a Small Watershed in Upper Yuan River: Experimental Design and Primary Data Analysis

As experiment is an important mean to study impact of non-point sources, in this paper, a small watershed in upper Yuan River was chosen to carry out experiments, and primary analysis was done, including statistics and model simulation. The results obtained from the experiments suggested that the quantities of pollutants varied greatly with land use types. It has been found that the land cover played an important role in transportation of undissolved pollutants, and the background contents in soils contributed greatly to the movement of some solutes. The status of non-point source in the watershed was described well by the output of the SWAT model. With the aid of the model, we could obtain the scene of the whole watershed on the base of the achievement of the small study area.